# Surveying MCQ Questions & Answers

Surveying MCQs : This section focuses on the "Surveying". These Multiple Choice Questions (MCQs) should be practiced to improve the Surveying skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A bearing of a line is also known as

A. magnetic bearing
B. true bearing
C. azimuth
D. reduced bearing

Question 2

ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is

A. 90°
B. 120°
C. 210°
D. 270°

Question 3

Accuracy of 'fix' by two point problem, is

B. good
C. not reliable
D. unique.

Question 4

An ideal vertical curve to join two gradients, is

A. circular
B. parabolic
C. elliptical
D. hyperbolic

Question 5

An imaginary line joining the points of equal elevation on the surface of the earth, represents

A. contour surface
C. contour line
D. level line

Question 6

Closed contours of decreasing values towards their centre, represent

A. a hill
B. a depression
D. a river bed.

Question 7

Diopter is the power of a lens having a focal length of

A. 25 cm
B. 50 cm
C. 75 cm
D. 100 cm

Question 8

For the construction of highway (or railway)

A. longitudinal sections are required
B. cross sections are required
C. both longitudinal and cross sections are required
D. none of these.

Question 9

For true difference in elevations between two points A and B, the level must be set up

A. at any point between A and B
B. at the exact mid point of A and B
C. near the point A
D. near the point B.

Question 10

Hydrographic surveys deal with the mapping of

A. large water bodies
B. heavenly bodies
C. mountaineous region
D. canal system

Question 11

If θ is the slope of the ground and l is the measured distance, the correction is

A. 2l sin2 θ/2
B. 2l cos2 θ/2
C. 2l tan2 θ/2
D. 2l cot2 θ/2.

Question 12

If R is the radius of the main curve, θ the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is

A. (R - S) tan θ/2 - L/2
B. (R + S) tan θ/2 - L/2
C. (R + S) tan θ/2 + L/2
D. (R - S) tan θ/2 + L/2

Question 13

If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

A. R/10
B. R/15
C. R/20
D. R/25.

Question 14

In chain surveying field work is limited to

A. linear measurements only
B. angular measurements only
C. both linear and angular measurements
D. all the above.

Question 15

In chain surveying tie lines are primarily provided

A. to check the accuracy of the survey
B. to take offsets for detail survey
C. to avoid long offsets from chain lines
D. to increase the number of chain lines.

Question 16

In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by

A. adding 180°, if the given bearing is less than 180°
B. subtracting 180°, if the given bearing, is more than 180°
C. changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
D. none of these.

Question 17

Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than

A. 30 m
B. 25 m
C. 20 m
D. 15 m

Question 18

Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to

A. 14.14
B. 28.28 m
C. 200 m
D. none of these.

Question 19

One of the Lehmann's rules of plane tabling, is

A. location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances
B. when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray
C. when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays
D. none of these.

Question 20

One of the tacheometric constants is additive, the other constant, is

A. subtractive constant
B. multiplying constant
C. dividing constant
D. indicative constant.

Question 21

Pick up the correct statement from the following :

A. the eyepiece plays no part in defining the line of sight
B. the diaphragm plays no part in defining the line of sight
C. the optical centre of the objective plays no part in defining the line of sight
D. none of these.

Question 22

Pick up the correct statement from the following :

A. the tangent screw enables to give small movement under conditions of smooth and positive control
B. standing on the tripod is the levelling head or trib arch
C. the levelling screws are used to tilt the instrument so that its rotation axis is truly vertical
D. all the above.

Question 23

Pick up the correct statement from the following :

A. the apparent error on reversal is twice the actual error
B. the correction may be made equal to half the observed discrepancy.
C. the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results
D. all the above.

Question 24

Pick up the correct statement from the following:

A. the theodolite in which telescope can be rotated in vertical plane is called a transit
B. when the vertical circle is to the left of the telescope during observation, it is called to be in left face
C. when the vertical circle is to the right of the telescope during observation, it is called to be in right face
D. all the above.

Question 25

Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following

A. chain surveying
B. compass surveying
C. plan table surveying
D. tacheometric surveying.

Question 26

The accuracy of measurement in chain surveying, does not depend upon

A. length of the offset
B. scale of the plotting
C. importance of the features
D. general layout of the chain lines.

Question 27

The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is

A. 102°
B. 78°
C. 45°
D. none of these.

Question 28

The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to

A. the distance between the zero of gradient and the foot of the staff
B. twice the distance between the zero of graduation and the foot of the staff
C. thrice the distance between the zero of graduation and the foot of the staff
D. none of the above.

Question 29

The 'fix' of a plane table station with three known points, is bad if the plane table station lies

A. in the great triangle
B. outside the great triangle
C. on the circumference of the circumscribing circle
D. none of these.

Question 30

The intercept of a staff

A. is maximum if the staff is held truly normal to the line of sight.
B. is minimum if the staff is held truly normal to the line of sight.
C. decreases if the staff is tilted away from normal
D. increases if the staff is tilted towards normal.

Question 31

The limiting length of an offset does not depend upon

A. accuracy of the work
B. method of setting out perpendiculars
C. scale of plotting
D. indefinite features to be surveyed.

Question 32

The main principle of surveying is to work

A. from part to the whole
B. from whole to the part
C. from higher level to the lower level
D. from lower level to higher level.

Question 33

The most reliable method of plotting a theodolite traverse, is

A. by consecutive co-ordinates of each station
B. by independent co-ordinates of each station
C. by plotting included angles and scaling off each traverse leg
D. by the tangent method of plotting.

Question 34

The probable error of the adjusted bearing at the middle is

A. rn
B. rn
C. rn
D. rn.

Question 35

The radius of curvature of the arc of the bubble tube is generally kept

A. 10 m
B. 25 m
C. 50 m
D. 100 m

Question 36

The real image of an object formed by the objective, must lie

A. in the plane of cross hairs
B. at the centre of the telescope
C. at the optical centre of the eye-piece
D. anywhere inside the telescope.

Question 37

The sensitiveness of a level tube decreases if

A. radius of curvature of its inner surface is increased
B. diameter of the tube is increased
C. length of the vapour bubble is increased
D. both viscosity and surface tension are increased.

Question 38

The slope correction for a length of 30 m along a gradient of 1 in 20, is

A. 3.75 cm
B. 0.375 cm
C. 37.5 cm
D. 2.75 cm.

Question 39

True meridians are generally preferred to magnetic meridians because

A. these converge to a point
B. these change due to change in time
C. these remain constant.
D. None of these.

Question 40

Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is

A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm

Question 41

While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is

A. correctly focussed
B. not correctly focussed
C. said to have parallax
D. free from parallax.

Question 42

To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30,000, with a camera of 30 cm focal length, the flying height is

A. 4000 m
B. 5000 m
C. 6000 m
D. 7000 m

Question 43

The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height ‘H’ is 100 m. If mean photo base is 95.2 mm, the flying height is

A. 8,000 m
B. 10,000 m
C. 12,000 m
D. 14,000 m

Question 44

The correction for parallax, is

A. - 8".8 cos α
B. + .8" sin α
C. + 8".8 cos α
D. - 8".8 cos α

Question 45

The Polaris describes a small circle round the pole whose radius is approximately

A. 1°
B. 2°
C. 3°
D. 4°

Question 46

Sensitiveness of a level tube is designated by

B. length of level tube
C. length of bubble of level tube
D. none of the above

Question 47

Agate cap is fitted with a

A. cross staff
B. level
C. chain
D. prismatic compass

Question 48

The length of a chain is measured from

A. centre of one handle to centre of other handle
B. outside of one handle to outside of other handle
C. outside of one handle to inside of other handle
D. inside of one handle to inside of other handle

Question 49

The nautical mile is the length of

A. 1 minute of latitude
B. 1 minute of longitude
C. 1 degree of latitude
D. 1 degree of longitude

Question 50

If the equatorial distance between two meridians is 100 km, their distance at 60° latitude will be

A. 1000 km
B. 800 km
C. 600 km
D. 500 km

Question 51

The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is

A. 1 : 10,000
B. 1 : 15,000
C. 1 : 20,000
D. 1 : 30,000

Question 52

In an internal focussing type of telescope, the lens provided is

A. concave
B. convex
C. plano-convex
D. plano-concave

Question 53

Which of the following is not the function of levelling head ?

A. to support the main part of the instrument
B. to attach the theodolite to the tripod
C. to provide a means for leveling the theodolite
D. none of the above

Question 54

Local attraction in compass surveying may exist due to

A. incorrect levelling of the magnetic needle
B. loss of magnetism of the needle
C. friction of the needle at the pivot
D. presence of magnetic substances near the instrument

Question 55

A Nautical mile is

A. One minute arc of the great circle passing through two points
B. One minute arc of the longitude
C. 1855.109 m
D. All the above

Question 56

With the rise of temperature, the sensitivity of a bubble tube

A. decreases
B. increases
C. remains unaffected
D. none of the above

Question 57

Direct method of contouring is

A. a quick method
B. adopted for large surveys only
C. most accurate method
D. suitable for hilly terrains

Question 58

The correction applied to the measured base of length ‘L’ is

A. Tension = (P - Ps)L/AE
B. Sag = L³w²/24P² where w is the weight of tape/m
C. Slope = (h²/2L) + (h⁴/8L³) where h is height difference of end supports
D. All the above

Question 59

The shortest distance between two places measured along the surface of the earth, is

A. Length of the equator between their longitudes
B. Length of the parallel between their longitudes
C. Length of the arc of the great circle passing through them
D. None of these

Question 60

Longitude of a place is the angular distance between the meridian of the place and

A. The standard meridian
B. The International Date Line
C. That of Greenwich
D. Both (A) and (C) of above

Question 61

If the altitudes of a star at its upper and lower transits are 60° 30' and 19° 30' respectively, the latitude of the place, is

A. 30°
B. 35°
C. 30°
D. 45°

Question 62

The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The latitude of the place, is

A. 80°
B. 70°
C. 60°
D. 40°

Question 63

Triangulation surveys are carried out for locating

A. Control points for surveys of large areas
B. Control points for photogrammetric surveys
C. Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
D. All the above

Question 64

For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through

A. Isocenter
B. Plumb point
C. Principal point
D. None of these

Question 65

If the general ground level of any area is 10% of the flying height, the principal points may be used as the centers of radial directions for small scale mapping even in tilted photograph up to

A. 1°
B. 2°
C. 3°
D. 4°

Question 66

A star is said to elongate

A. When the star momentarily moves vertically
B. When the angle at the star of the spherical triangle is 90°
C. When the star
D. All the above

Question 67

If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is

A. 7.5 m
B. 25 m
C. 50 m
D. 75 m

Question 68

The latitude of a place was obtained by subtracting the zenith distance of a star from its declination, the observed star was between

A. Horizon and equator
B. Equator and zenith
C. Zenith and pole
D. Pole and horizon

Question 69

The latitude of a place was obtained by subtracting the declination of a star from its zenith distance, the observed star was between

A. Horizon and equator
B. Zenith and pole
C. Equator and zenith
D. Pole and horizon

Question 70

The flying height of the camera is 1,000 m above mean ground level, the distance of the top of a building from a nadir point is 10 cm and the relief displacement of building is 7.2 mm. The height of the building, is

A. 52 m
B. 62 m
C. 72 m
D. 82 m

Question 71

The stereo plotting instruments are generally manufactured on the principle of

A. Optical projection
B. Optical mechanism projection
C. Mechanical projection
D. All the above

Question 72

The true and mean suns occupy the same meridian at the same time on

A. April 15
B. June 14
C. September 1
D. All the above

Question 73

If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is

A. πR²E/90°
B. πR²E/180°
C. πR²E/270°
D. πR²E/360°

Question 74

The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as

A. Satellite station
B. Eccentric station
C. False station
D. Pivot station

Question 75

In a spherical triangle ABC right angled at C, sin b equals to

A. sin c sin B
B. cos c cos B
C. tan c tan B
D. sin c cos B

Question 76

23 cm × 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents

A. 1 m
B. 2 m
C. 4 m
D. 8 m

Question 77

The declination and right ascension of the sun becomes 23° 27' N and 90° respectively on

A. March 21
B. June 21
C. September 21
D. December 22

Question 78

The declination and right ascension of the sun becomes 23° 27' S and 270° respectively on

A. March 21
B. June 21
C. September 21
D. December 22

Question 79

The following sights are taken on a “turning point”

A. foresight only
B. backsight only
C. foresight and backsight
D. foresight and intermediate sight

Question 80

The horizontal angle between the true meridian and magnetic meridian at a place is called

A. azimuth
B. declination
C. local attraction
D. magnetic bearing

Question 81

A ’level line’ is a

A. horizontal line
B. line parallel to the mean spheriodal surface of earth
C. line passing through the center of cross hairs and the center of eye piece
D. line passing through the objective lens and the eye-piece of a dumpy or tilting level

Question 82

Accidental errors

A. Do not follow any definite mathematical law
B. Cannot be removed by applying corrections to the observed values
C. Are generally small
D. All the above

Question 83

Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

A. By subtracting their longitudes if places are in the same hemisphere
B. By adding their longitudes if places are in the different hemispheres
C. By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
D. All the above

Question 84

Refraction correction

A. completely eliminates curvature correction
B. partially eliminates curvature correction
C. adds to the curvature correction
D. has no effect on curvature correction

Question 85

The number of horizontal cross wires in a stadia diaphragm is

A. one
B. two
C. three
D. four

Question 86

The prime vertical passes through

A. The east point of the horizon
B. The west point of the horizon
C. The zenith point of the observer
D. All the above

Question 87

The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is

A. B = bH/f
B. B =f/bH
C. B = b/fH
D. B = H/bf

Question 88

The principal plane contains

B. Iso-centre
C. Principal point
D. All the above

Question 89

Latitude of the observer's position is equal to altitude of

A. North pole
B. Pole star
C. Celestial pole
D. All the above

Question 90

The parallax equation Δp = BmΔh/H - h is applicable to entire overlap of the photographs only if parallax is measured

A. Normal to base line
B. Parallel to base line
C. Both (A) and (B)
D. Neither (A) nor (B)

Question 91

If the length of a chain is found to be short on testing, it can be adjusted by

B. removing one or more small circular rings
C. closing the joints of the rings if opened out
D. all of the above

Question 92

In the double application of principle of reversion, the apparent error is

A. equal to true error
B. half the true error
C. two times the true error
D. four times the true error

Question 93

The solar tidal force divided by lunar tidal force is

A. 1-3
B. 1-2
C. 3-4
D. 5-4

Question 94

Closed contours, with higher value inwards, represent a

A. depression
B. hillock
C. plain surface
D. none of the above

Question 95

The average eye base is assumed as

A. 58 mm
B. 60 mm
C. 62 mm
D. 64 mm

Question 96

The longitudes of two places at latitude 60° N are 93° E and 97° W. Their departure is

A. 5100 nautical miles
B. 5700 nautical miles
C. 120 nautical miles
D. 500 nautical miles

Question 97

The distance between the minor control point and the principal point should be equal to

A. Base line of the left photograph of stereo pair
B. Base line of the right photograph of stereo pair
C. Sum of the base lines of stereo pair
D. Mean of the base lines of the stereo pair

Question 98

The meridian of a place is

A. A great circle passing through the place and the poles
B. A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
C. A semi-circle which passes through the place and is terminated at the poles
D. An arc of the great circle which passes through the place and is perpendicular to the equator

Question 99

The coverage is least if photography is

A. High oblique
B. Low oblique
C. Vertical
D. None of these

Question 100

Rotation of the camera at exposure about horizontal axis normal to the line of flight, is known as

A. Swing
B. Tilt
C. Tip
D. None of these

Question 101

The principal line is the line joining the principal point and

B. Isocenter
C. Perspective centre
D. None of these

Question 102

The product of the distances of plumb point and horizon point of a vertical photograph from its principal point, is

A. f2
B. 2f2
C. 3f2
D. ½f

Question 103

A series of closely spaced contour lines represents a

A. steep slope
B. gentle slope
C. uniform slope
D. plane surface

Question 104

Places having same latitude

A. Lie on the parallel of the latitude
B. Are equidistant from the nearer pole
C. Are equidistant from both the poles
D. All the above

Question 105

The sun's declination remains north between

A. March 21 to June 21
B. June 21 to September 21
C. September 21 to December 21
D. Both (A) and (B) of above

Question 106

Benchmark is established by

A. hypsometry
B. barometric levelling
C. spirit levelling
D. trigonometrical levelling

Question 107

The normal longitudinal overlap is generally kept

A. 50 %
B. 60 %
C. 70 %
D. 75 %

Question 108

The difference of parallax for a given difference in elevation is independent of

A. Focal length of the camera
B. Overall size of the photo graphs
C. Percentage of overlap
D. All the above

Question 109

If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is

A. 0.1
B. 0.4
C. 0.6
D. 1.33

Question 110

Latitude of a place is the angular distance from

A. Greenwich to the place
B. Equator to the poles
C. Equator to the nearer pole
D. None of these

Question 111

If α, H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ, the following relation holds good

A. cos H = tan λ/tan δ
B. sin α = sin λ/sin δ
C. sin A = cos δ/cos λ
D. All the above

Question 112

The latitude (λ) of a place and the altitude (α) of the pole are related by

A. λ = α
B. λ = 90° - α
C. λ = α - 90°
D. λ = 180° - α

Question 113

The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as

A. Isocenter
B. Principal point
C. Perspective centre
D. Plumb line

Question 114

Pick up the incorrect statement from the following. High oblique photographs

A. May have tilt up to 30°
B. May include the image of the horizon
C. May not include the image of the horizon
D. None of these

Question 115

Parallax bar measures

A. Parallax
B. Height
C. Parallax difference
D. Height difference

Question 116

Homologous points are

A. Opposite corners of a photograph
B. Nodal points of the camera lens
C. Corresponding points on the ground and photograph
D. Plumb points of stereo pair of photographs

Question 117

Limiting gradient for locating the base line on evenly-sloping ground, is

A. 1 in 12
B. 1 in 10
C. 1 in 8
D. 1 in 6

Question 118

According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

A. Tangents of two adjacent parts
B. Sines of two adjacent parts
C. Cosines of two adjacent parts
D. Both (A) and (B) above

Question 119

Pick up the incorrect statement from the following:

A. Latitudes north of the equator are taken as positive
B. Latitudes south of the equator are taken as negative
C. Longitudes east of Greenwich are taken as negative
D. Longitudes west of Greenwich are taken as positive

Question 120

Pick up the correct statement from the following:

A. North end of the polar axis is known as North Pole
B. South end of the polar axis is known as South Pole
C. Point where polar axis when produced northward intersects the celestial sphere, is known as north celestial pole
D. All the above

Question 121

The value of geocentric parallax to be added to the observed altitude of sun is

A. 9" cos α
B. 9" sin α
C. 9" tan α
D. 9" cot α

Question 122

While making astronomical observations, the observer is mainly concerned with

A. The direction of the vertical, the axis of rotation of the instrument
B. The direction of the poles of the celestial sphere
C. The direction of the star from the instrument
D. All the above

Question 123

If v, t and f/H are the ground speed of the aircraft, the shutter speed of the camera and the scale of the photograph respectively, then the amount of image displacement

A. i = v. t. H/f
B. i = v. f/t. H
C. i = v. t. (f/H)
D. i = t. H/v. f

Question 124

An aerial photograph may be assumed as

A. Parallel projection
B. Orthogonal projection
C. Central projection
D. None of these

Question 125

G.M.T. corresponding to given mean time, equals

A. L.M.T. - East longitude in time
B. L.M.T. + East longitude in time
C. L.M.T. - West longitude in time
D. None of these

Question 126

There are two stations A and B. Which of the following statements is correct?

A. The fore bearing of AB is AB
B. The back bearing of AB is BA
C. The fore and back bearings of AB differ by 180°
D. All the above

Question 127

Homologous point is

A. Photo principal point
B. Ground principal point
C. Ground isocenter
D. All the above

Question 128

Intersection method of detailed plotting is most suitable for

A. forests
B. urban areas
C. hilly areas
D. plains

Question 129

The maximum tolerance in a 20 m chain is

A. ±2 mm
B. ±3 mm
C. ±5 mm
D. ±8 mm

Question 130

In the quadrantal bearing system, a whole circle bearing of 293° 30′ can be expressed as

A. W23°30’N
B. N66°30’W
C. S113°30’N
D. N23°30’W

Question 131

The sensitivity of a bubble tube can be increased by

A. increasing the diameter of the tube
B. decreasing the length of bubble
C. increasing the viscosity of liquid
D. decreasing the radius of curvature of tube

Question 132

Pick up the correct statement from the following:

A. Aerial photographs may be either vertical or oblique
B. Vertical photographs are taken with the axis of camera pointing vertically downward
C. Vertical photographs are used for most accurate maps
D. All the above

Question 133

Pick up the incorrect statement from the following:

A. Apparent solar time is measured from the lower transit of the true sun
B. Mean solar time is measured from the lower transit of the mean sun
C. Sidereal time is measured from the lower transit of the first point of Aries
D. Sidereal time is measured from the upper transit of the first point of Aries

Question 134

The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The declination of the star, is

A. 80°
B. 70°
C. 60°
D. 50°

Question 135

The maximum error in radial line assumption, is

A. h/H f tan θ
B. h/H f² tan θ
C. h/H f² sin θ
D. h/H f cos θ

Question 136

Different grades are joined together by a

A. Compound curve
B. Transition curve
C. Reverse curve
D. Vertical curve

Question 137

If in a closed traverse, the sum of the north latitudes is more than the sum of the south latitudes and also the sum of west departures is more than the sum of the east departures, the bearing of the closing line is in the

Question 138

In triangulation surveys

A. The area is divided into triangular figures
B. Control stations are located from which detailed surveys are carried out
C. Sides are not measured excepting the base line
D. All the above

Question 139

If θ and δ be the latitude of a place and declination of a star respectively, the upper culmination of the star will be north of zenith if its zenith distance, is

A. δ - θ
B. θ - δ
C. θ + δ
D. (θ + δ)/2

Question 140

Pick up the correct statement from the following:

A. One degree of longitude has greatest value at the equator
B. One degree of longitude has greatest value at the poles
C. One degree of longitude has the same value everywhere
D. One degree of latitude decreases from the equator to the poles

Question 141

Pick up the correct statement from the following:

A. Refraction correction is zero when the celestial body is in the zenith
B. Refraction correction is 33' when the celestial body is on the horizon
C. Refraction correction of celestial bodies depends upon their altitudes
D. All the above

Question 142

If θ and δ be the latitude of an observer and declination of a heavenly body respectively, the upper culmination of the body will be south of zenith if its zenith distance, is

A. δ - θ
B. θ - δ
C. θ + δ
D. ½ (θ - δ)

Question 143

Which of the following methods of offsets involves less measurement on the ground?

A. method of perpendicular offsets
B. method of oblique offsets
C. method of ties
D. all involve equal measurement on the ground

Question 144

The difference between a level line and a horizontal line is that

A. level line is a curved line while hori-zontal line is a straight line
B. level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
C. horizontal line is normal to plumb line while level line may not be normal to the plumb line
D. both are same

Question 145

Pick up the correct statement for horizontal photographs.

A. Parallel lines do not appear parallel in central projection
B. The two sides of a road meet at the vanishing point
C. The lines parallel to the negative plane are projected as parallel lines
D. All the above

Question 146

In observations of equal precision, the most probable values of the observed quantities are those that render the sum of the squares of the residual errors a minimum, is the fundamental principle of

A. Gauss' Mid Latitude formula
B. D'Alembert's method
C. Legendre's method
D. Least square method

Question 147

Contour interval is

A. Inversely proportional to the scale of the map
B. Directly proportional to the flatness of ground
C. Larger for accurate works
D. Larger if the time available is more

Question 148

Assuming human normal vision distance 25 cm, smallest measurable angle 20", and intraocular distance 6.5 cm, the smallest depth to be discerned is

A. 0.1 mm
B. 0.5 mm
C. 1.00 mm
D. 1.1 mm

Question 149

If the distance between the projectors is altered by a movement along X-axis of one projector,

A. The length of the air base is increased
B. The scale of the model is altered
C. y-parallax is not affected
D. All the above

Question 150

Pick up the correct statement from the following:

A. Centre of the celestial sphere is taken as the position of the observer
B. Centre of the celestial sphere is taken as the centre of the earth
C. Stars move and maintain their relative positions
D. All the above

Question 151

Pick up the incorrect statement from the following:

A. Correction for refraction is always negative
B. Correction for parallax is always positive
C. Correction for semi-diameter is always negative
D. Correction for dip is always negative

Question 152

The relief displacement of a building 72 m high on photograph is 7.2 mm and its top appears 10 cm away from principal point. The flying height of the camera, is

A. 500 m
B. 1000 m
C. 1500 m
D. 2000 m

Question 153

The orthogonal projection of the perspective centre on a tilted photograph, is called

B. Isocenter
C. Principal point
D. Plumb point

Question 154

The distance between the projection centre and the photograph, is called

A. Principal distance
B. Principal line
C. Isocentric distance
D. Focal length

Question 155

The great circle which passes through the zenith, nadir and the poles, is known as

A. Meridian
B. Vertical circle
C. Prime vertical
D. None of these

Question 156

Pick up the correct statement from the following:

A. Sidereal time at any instant is equal to the hour angle of the first point of Aries
B. Local sidereal time of any place is equal to the right ascension of its meridian
C. Sidereal time is equal to the right ascension of a star at its upper transit
D. All the above

Question 157

Pick up the correct statement from the following:

A. The angle between the plane of the negative and the horizontal plane containing perspective axis is the tilt of the photograph
B. The direction of maximum tilt is defined by the photo principal line
C. The principal plane is truly vertical plane which contains perspective centre as well as principal point and plumb point
D. All the above

Question 158

The following points form a pair of homologous points:

A. Photo principal point and ground principal point
B. Photo isocenter and ground isocenter
C. Photo plumb point and ground plumb point
D. All the above

Question 159

The necessary geometrical condition for triangulation adjustment is:

A. The sum of the angles around a station should be 360°
B. The sum of the three angles of a plane triangle should be 180°
C. The sum of the eight angles of a braced quadrilateral should be 360°
D. All the above

Question 160

If α is the observed altitude, the refraction correction in seconds, is

A. 58" cot α
B. 58" tan α
C. 58 sin α
D. 58 cos α

Question 161

The elevation of the star at elongation is obtained by

A. sin α = sin φ cosec δ
B. sin α = sin φ sec δ
C. sin α = cos φ sec δ
D. sin α = cos φ cosec δ

Question 162

For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are

A. Two angle equations and two side equations
B. One angle equation and three side equations
C. Three angle equations and one side equation
D. None of these

Question 163

An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as

A. contour line
B. horizontal equivalent
C. contour interval

Question 164

The angle of intersection of the two plane mirrors of an optical square is

A. 30°
B. 45°
C. 60°
D. 90°

Question 165

Longitudes are measured from 0° to

A. 180° eastward
B. 180° westward
C. 180° east or westward
D. 360° eastward

Question 166

If ‘δ’ is the declination of the star and ‘φ’ is the latitude of the observer then the hour angle of the star at elongation is given by

A. sin H = tan φ . cot δ
B. cos H = tan φ . cot δ
C. tan H = tan φ . cot δ
D. None of these

Question 167

If ‘δ’ is the declination of the star and ‘φ’ is the latitude of the observer, then the azimuth of the star at elongation is given by

A. sin z = sec φ . cos δ
B. cos z = sec φ . cos δ
C. tan z = sec φ . cos δ
D. None of these

Question 168

The altitude of a circumpolar star is maximum when it is

A. At east elongation
B. At upper culmination
C. At west elongation
D. At lower culmination

Question 169

Rotation of the camera at exposure about its vertical axis, is known as

A. Swing
B. Tilt
C. Tip
D. None of these

Question 170

The angle between the observer's meridian and declination circle of a heavenly body, is known as

A. Hour angle
B. Azimuth
C. Right ascension
D. Declination

Question 171

A metallic tape is made of

A. steel
B. invar
C. linen
D. cloth and wires

Question 172

If S is the sum of three angles of a spherical triangle, the spherical excess equals

A. S - 90°
B. S - 180°
C. S - 270°
D. S - 360°

Question 173

The suitable contour interval for a map with scale 1 : 10000 is

A. 2 m
B. 5 m
C. 10 m
D. 20 m

Question 174

Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ?

B. intersection
C. traversing
D. resection

Question 175

Which of the following errors cannot be eliminated by taking both face observations ?

A. error due to horizontal axis not being perpendicular to the vertical axis
B. index error i.e. error due to imperfect adjustment of the vertical circle vernier
C. error due to non-parallelism of the axis of telescope level and line of collimation
D. none of the above

Question 176

Which of the following errors can be eliminated by taking mean of bot face observations ?

A. error due to imperfect graduations
B. error due to eccentricity of verniers
C. error due to imperfect adjustment of plate levels
D. error due to line of collimation not being perpendicular to horizontal axis

Question 177

The scale of a vertical photograph of focal length ‘f’ taken from height of ‘H’ metres above M.S.L., at a point of reduced level ‘h’, is

A. f/H
B. f/(H + h)
C. f/(H - h)
D. (H - h)/f

Question 178

Perspective centre relates to

A. Parallel projection
B. Orthogonal projection
C. Central projection
D. None of these

Question 179

Circumpolar stars

A. Rotate round the North Pole
B. Rotate round the celestial pole
C. Remain always above the horizon
D. Are seldom seen near the pole star

Question 180

The rise and fall method of levelling provides a complete check on

A. backsight
B. intermediate sight
C. foresight
D. all of the above

Question 181

Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel

A. 24 %
B. 36 %
C. 40 %
D. 60 %

Question 182

In direct method of contouring, the process of locating or identifying points lying on a contour is called

A. ranging
B. centring
C. horizontal control
D. vertical control

Question 183

If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a level The correct answer is

A. only (i)
B. both (i) and (iv)
C. only (iii)
D. both (ii) and (iii)

Question 184

In the cross-section method of indirect contouring, the spacing of cross-sections depends uponi) contour intervalii) scale of planiii) characteristics of groundThe correct answer is

A. only (i)
B. (i) and (ii)
C. (ii) and (iii)
D. (i), (ii) and (iii)

Question 185

Height of instrument method of levelling is

A. more accurate than rise and fall method
B. less accurate than rise and fall method
C. quicker and less tedious for large number of intermediate sights
D. none of the above

Question 186

The slotted template method

A. Is prepared, by graphical method
B. Is suitable for large areas with less control
C. Is rapid and accurate
D. All the above

Question 187

When a star is between the pole and the horizon, the relationship between latitude (λ), zenith distance (z) and declination δ, is

A. θ = z + δ
B. θ = δ - z
C. θ = 180° - (z + δ)
D. θ = (z + δ) - 180°

Question 188

The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by

A. sin λ
B. cos λ
C. tan λ
D. cot λ

Question 189

The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for any other meridian + longitude:

A. Mean sun
B. True sun
C. Vernal equinox
D. All the above

Question 190

Which of the following is not used in measuring perpendicular offsets ?

A. line ranger
B. steel tape
C. optical square
D. cross staff

Question 191

The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than

A. 0.01 second
B. 0.001 second
C. 0.0001 second
D. None of these

Question 192

Right ascension of a heavenly body is its equatorial angular distance measured

A. Westward from the first point of Libra
B. Eastward from the first point of Aeries
C. Westward from the first point of Aeries
D. Eastward from the first point of Libra

Question 193

α and β are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being ‘S’ and ‘f’ respectively. Parallax displacement of the point due to relief, is

A. h tan α/S
B. h tan β/S
C. h (tan α + tan β)/S
D. h (tan α - tan β)/S

Question 194

The method of surveying by triangulation was first introduced by the Dutchman Snell in

A. 1600
B. 1615
C. 1630
D. 1650

Question 195

The rise and fall method

A. is less accurate than height of instrument method
B. is not suitable for levelling with tilting levels
C. provides a check on the reduction of intermediate point levels
D. quicker and less tedious for large number of intermediate sights

Question 196

A telescope is said to be inverted if its

A. vertical circle is to its right and the bubble of the telescope is down
B. vertical circle is to its right and the bubble of the telescope is up
C. vertical circle is to its left and the bubble of the telescope is down
D. vertical circle is to its left and the bubble of the telescope is up

Question 197

Size of a theodolite is specified by

A. the length of telescope
B. the diameter of vertical circle
C. the diameter of lower plate
D. the diameter of upper plate

Question 198

If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be

A. +50 m, +86.6 m
B. +86.6 m, -50 m
C. +50 m, -86.6 m
D. +70.7 m, -50 m

Question 199

A lemniscate curve between the tangents will be transitional throughout if the polar deflection angle of its apex, is

A. Δ/2
B. Δ/3
C. Δ/4
D. Δ/6

Question 200

A plate parallel is the line on the plane of the negative

A. Parallel to the principal line
B. Perpendicular to the principal line
C. Along the bisector of the angle between the principal line and a perpendicular line through principal plane
D. None of these

Question 201

At eastern elongation, the pole star moves

A. Eastward
B. Westward
C. Northward
D. Southward

Question 202

At upper culmination, the pole star moves

A. Eastward
B. Westward
C. Northward
D. Southward

Question 203

At western elongation, the pole star moves

A. Eastward
B. Westward
C. Northward
D. Southward

Question 204

At lower culmination, the pole star moves

A. Eastward
B. Westward
C. Northward
D. Southward

Question 205

The instrument used for accurate centering in plane table survey is

A. spirit level
C. plumbing fork
D. trough compass

Question 206

The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called

A. Equator
B. Celestial equator
C. Ecliptic
D. None of these

Question 207

The methods used for locating the plane table stations arei) radiationii) traversingiii) intersectioniv) resectionThe correct answer is

A. (i) and (ii)
B. (iii) and (iv)
C. (ii) and (iv)
D. (i) and (iii)

Question 208

Pick up the correct statement from the following:

A. The star's movement is apparent due to the actual steady rotation of the earth about its axis
B. The stars move round in circular concentrated parts
C. The centre of the circular paths of stars is the celestial pole
D. All the above

Question 209

The graduations in prismatic compassi) are invertedii) are uprightiii) run clockwise having 0° at southiv) run clockwise having 0° at northThe correct answer is

A. (i) and (iii)
B. (i) and (iv)
C. (ii) and (iii)
D. (ii) and (iv)

Question 210

The correction for sag is

B. always subtractive
C. always zero
D. sometimes additive and sometimes subtractive

Question 211

The point on the photograph where bisector between the vertical line through optical centre of the camera lens and the plate perpendicular meets, is known as

A. Principal point
B. Isocenter
C. Plumb point
D. Perspective centre

Question 212

The two point problem and three point problem are methods of

A. resection
B. orientation
C. traversing
D. resection and orientation

Question 213

Which of the following angles can be set out with the help of French cross staff?

A. 45° only
B. 90° only
C. either 45° or 90°
D. any angle

Question 214

Check lines (or proof lines) in Chain Surveying, are essentially required

A. To plot the chain lines
B. To plot the offsets
C. To indicate the accuracy of the survey work
D. To increase the out-turn

Question 215

A negative declination shows that the magnetic meridian is to the

A. eastern side of the true meridian
B. western side of the true meridian
C. southern side of the true meridian
D. none of the above

Question 216

The latitude of the observer's position, is

A. Elevation of the elevated pole
B. Declination of the observer's zenith
C. Angular distance along the observer's meridian between equator and the observer
D. All the above

Question 217

If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be

A. true R.L.
B. more than true R.L.
C. less than true R.L.
D. none of the above

Question 218

At the first point of Aeries, the sun moves

A. Northward
B. Southward
C. From south to north of the equator
D. From north to south of the equator

Question 219

The cross hairs in the surveying telescope are placed

A. midway between eye piece and objec-tive lens
B. much closer to the eye-piece than to the objective lens
C. much closer to the objective lens than to the eye piece
D. anywhere between eye-piece and objective lens

Question 220

The smaller horizontal angle between the true meridian and a survey line, is known

A. Declination
B. Bearing
C. Azimuth
D. Dip

Question 221

If ‘δ’ is the declination of the Polaris and ‘λ’ is the latitude of the place, the azimuth of the Polaris, is

A. cos δ/cos λ
B. cos (90° - δ)/cos (90° - λ)
C. sin (90° - δ)/sin (90° - λ)
D. tan (90° + δ)/tan (90° + λ)

Question 222

The difference in longitude of two places expressed in time is equal to the difference in their

A. Sidereal time
B. Apparent solar time
C. Mean solar time
D. All the above

Question 223

For a line AB

A. the forebearing of AB and back bearing of AB differ by 180°
B. the forebearing of AB and back bearing of BA differ by 180°
C. both (A) and (B) are correct
D. none is correct

Question 224

Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer's meridian measured from the pole, is

A. Co-declination
B. Co-altitude
C. Co-latitude
D. Polar distance

Question 225

Detailed plotting is generally done by

B. traversing
C. resection
D. all of the above

Question 226

The station pointer is generally used in

A. Triangulation surveying
B. Astronomical surveying
C. Hydrographical surveying
D. Photogrammetric surveying

Question 227

Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

A. error due to eccentricity of verniers
B. error due to displacement of station signals
C. error due to wrong adjustment of line of collimation and trunnion axis
D. error due to inaccurate graduation

Question 228

The negative sign is assigned to

A. Reduction to mean sea level
B. Correction for horizontal alignment
C. Correction for slope
D. All the above

Question 229

The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is

A. f/H sec θ
B. f sec θ/H
C. f/H
D. f/H cos ½θ

Question 230

The altitude of a heavenly body is its angular distance, measured on the vertical circle passing through the body, above

A. Equator
B. Horizon
C. Pole
D. None of these

Question 231

‘H’ is the flying height above mean ground level and ‘f’ is the principal distance of a vertical photograph. The mean scale of the photographs is

A. H. f
B. H/f
C. f/H
D. H + f

Question 232

Which of the following errors can be neutralised by setting the level midway between the two stations ?

A. error due to curvature only
B. error due to refraction only
C. error due to both curvature and re-fraction
D. none of the above

Question 233

Select the correct statement.

A. A contour is not necessarily a closed curve.
B. A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour.
C. Two contours of different elevations do not cross each other except in case of an overhanging cliff.
D. All of the above statements are correct.

Question 234

Select the correct statement.

A. Contour interval on any map is kept constant.
B. Direct method of contouring is cheap¬er than indirect method.
C. Inter-visibility of points on a contour map cannot be ascertained.
D. Slope of a hill cannot be determined with the help of contours.

Question 235

Select the incorrect statement.

A. The true meridians at different places are parallel to each other.
B. The true meridian at any place is not variable.
C. The true meridians converge to a point in northern and southern hemispheres.
D. The maps prepared by national survey departments of any country are based on true meridians.

Question 236

If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is

A. 99.345 m
B. 100.345 m
C. 100.655 m
D. 101.870 m

Question 237

Dumpy level is most suitable when

A. the instrument is to be shifted frequently
B. fly levelling is being done over long distance
C. many readings are to be taken from a single setting of the instrument
D. all of the above

Question 238

The angle between the direction of star and the direction of earth's axis of rotation is called

A. Co-declination
B. Co-latitude
C. Declination
D. Latitude

Question 239

For a well-conditioned triangle, no angle should be less than

A. 20°
B. 30°
C. 45°
D. 60°

Question 240

Pick up the correct statement from the following:

A. If the applied tension to the tape is more than the standard, the tension correction is positive
B. If the applied tension to the tape is less than the standard, the tension correction is negative
C. If the temperature during measurement is greater than the standard temperature, the temperature correction is positive
D. All the above

Question 241

Pick up the incorrect statement from the following:

A. In truly vertical photographs without relief angles are true at the plumb point
B. In tilted photographs without relief, angles are true at the iso-centre
C. In tilled photographs with relief, angles are true at the principal point
D. None of these

Question 242

The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as

A. Ground principal point
B. Ground plumb point
C. Iso-centre
D. Perspective centre

Question 243

Triangulation surveys are carried out for providing

A. Planimetric control
B. Height control
C. Both planimetric and height control
D. None of these

Question 244

The point at which sun's declination changes from north to south, is known as

A. First point of Aeries
B. First point of Libra
C. Vernal Equinox
D. Both (B) and (C) of the above

Question 245

Contour interval is

A. The vertical distance between two consecutive contours
B. The horizontal distance between two consecutive contours
C. The vertical distance between two points on same contour
D. The horizontal distance between two points on same contour

Question 246

If ‘f’ is the focal length of the camera lens and ‘θ’ is the angle of tilt, the distance of the plumb point from the principal point will be

A. f sin θ
B. f cos θ
C. f tan θ
D. f sec θ

Question 247

Pick up the incorrect statement from the following. In a spherical triangle

A. Every angle is less than two right angles
B. Sum of the three angles is equal to two right angles
C. Sum of the three angles less than six right angles and greater than two right angles
D. Sum of any two sides is greater than the third

Question 248

If the image of a triangulation station of R.L. 500 m is 4 cm from the principal point of a vertical photo taken from an altitude of 2000 m, above datum, the height displacement will be

A. 2 mm
B. 4 mm
C. 6 mm
D. 10 mm

Question 249

The process of turning the telescope about the vertical axis in horizontal plane is known as

A. transiting
B. reversing
C. plunging
D. swinging

Question 250

For mapping any country

A. Geodetic triangulation of greatest possible sides and accuracy is carried out
B. Primary triangles are broken down into secondary triangles of somewhat lesser accuracy
C. Secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys
D. All the above

Question 251

In the prismatic compass

A. the magnetic needle moves with the box
B. the line of the sight does not move with the box
C. the magnetic needle and graduated circle do not move with the box
D. the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

Question 252

If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is

A. 10°
B. 20°
C. 30°
D. 40°

Question 253

The permissible error in chaining for measurement with chain on rough or hilly ground is

A. 1 in 100
B. 1 in 250
C. 1 in 500
D. 1 in 1000

Question 254

The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as

A. Photo plumb point
B. Plumb point
D. Isocenter

Question 255

The angle between the prolongation of the preceding line and the forward line of a traverse is called

A. deflection angle
B. included angle
C. direct angle
D. none of the above

Question 256

To avoid large centering error with very short legs, observations are generally made

A. To chain pins
B. By using optical system for centering the theodolite
C. To a target fixed on theodolite tripod on which theodolite may be fitted easily
D. All the above

Question 257

For which of the following permanent adjustments of theodolite, the spire test is used ?

B. adjustment of line of sight
D. adjustment of altitude bubble and vertical index frame

Question 258

The resection by two point problem as compared to three point problem

A. gives more accurate problem
B. takes less time
C. requires more labour
D. none of the above

Question 259

The angular distance of a heavenly body from the equator, measured along its meridian, is called

A. Declination
B. Altitude
C. Zenith distance
D. Co-latitude

Question 260

The station where observations are not made, but the angles at the station are used in triangulation series, is known as

A. Satellite station
B. Subsidiary station
C. Pivot station
D. Main station

Question 261

The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is

A. f/H sec θ
B. f sec θ/H
C. f/H
D. f/H cos ½θ

Question 262

The equation which is obtained by multiplying each equation by the coefficient of its unknowns and by adding the equations thus formed, is known as

A. Observation equation
B. Conditional equation
C. Normal equation
D. None of these

Question 263

The main object of the astronomer to obtain

A. Astronomical latitude
B. Astronomical longitude
C. Astronomical bearing
D. All of these

Question 264

Stellar astronomy deals with

A. Plane surveying
B. Geodetic surveying
C. Star observations
D. Planet observations

Question 265

The line of collimation method of reduction of levels, does not provide a check on

A. Intermediate sights
B. Fore sights
C. Back sights
D. Reduced levels

Question 266

Transit rule of adjusting the consecutive coordinates of a traverse is used where

A. linear and angular measurements of the traverse are of equal accuracy
B. angular measurements are more accurate than linear measurements
C. linear measurements are more accurate than angular measurements
D. all of the above

Question 267

The moon rotates round the earth once in every

A. 29 days
B. 29.35 days
C. 29.53 days
D. 30 days

Question 268

The height displacement on a vertical photograph

A. Increases as the horizontal distance increases from the principal point
B. Increases as the ground elevation increases
C. Decreases as the flying height increases
D. All the above

Question 269

The chord of a curve less than peg interval, is known as

A. Small chord
B. Sub-chord
C. Normal chord
D. Short chord

Question 270

The angle between the axis of earth and the vertical at the station of observation is called

A. Astronomical latitude
B. Astronomical co-latitude
C. Co-declination of star
D. Declination of star

Question 271

A star may culminate at zenith if its declination is

A. Greater than the longitude of the place
B. Less than the latitude of the place
C. Equal to the latitude of the place
D. None of these

Question 272

Pick up the correct statement from the following:

A. The vertical plane containing the zenith, the station of observation and the celestial pole is the observer's meridian plane
B. The angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star
C. The complement of the altitude of star is called the zenith distance of the star
D. All the above

Question 273

Which of the following statements is incorrect ?

A. Error due to refraction may not be completely eliminated by reciprocal levelling.
B. Tilting levels are commonly used for precision work.
C. The last reading of levelling is always a foresight.
D. All of the above statements are incorrect.

Question 274

Pick up the correct statement from the following:

A. Ursa Minor's remains always north of pole star
B. Polar star remains always north of Polaris
C. Polaris remains always north of Ursa Minor's
D. Ursa Minor's pole star and Polaris are the names of the same star

Question 275

The displacement of the pictured position of a point of h elevation on a vertical photograph taken with a camera of 30 cm focal length, from an altitude of 3000 m, is

A. 4.4 mm
B. 5.5 mm
C. 6.5 mm
D. 7.5 mm

Question 276

Bowditch rule is applied to

A. an open traverse for graphical adjustment
B. a closed traverse for adjustment of closing error
C. determine the effect of local attraction
D. none of the above

Question 277

The adjustment of horizontal cross hair is required particularly when the instrument is used for

A. leveling
B. prolonging a straight line
C. measurement of horizontal angles
D. all of the above

Question 278

Pick up the correct statement from the following:

A. The horizontal direction of the pole is called astronomical north
B. The angle between the direction of true north and the direction of a survey line is called astronomical bearing
C. The astronomical bearing is generally called azimuth
D. All the above

Question 279

Pick up the correct statement from the following:

A. The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
B. The difference between the absolute parallax of two points depends upon the difference in their elevations
C. The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
D. All the above

Question 280

For any star to be a circumpolar star, its

A. Declination must be 0°
B. Declination must be 90°
C. Distance from the pole must be less than the latitude of the observer
D. Hour angle must be 180°

Question 281

The sidereal day is the time interval between two successive upper transits of

A. Mean sun
B. First point of Aries
C. First point of Libra
D. The polar star

Question 282

If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will

A. increase
B. decrease
C. not change
D. either ‘A’ or ‘B’

Question 283

The prismatic compass and surveyor’s compass

A. give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
B. both give QB of a line and WCB of a line
C. both give QB of a line
D. both give WCB of a line

Question 284

The position of the sun when its north declination is maximum is known as

A. Vernal equinox
B. Autumnal equinox
C. Summer solstice
D. Winter solstice

Question 285

In field astronomy, the quantities observed are entirely

A. Lengths
B. Angles
C. Heights
D. All of these

Question 286

The net ground area of a vertical photograph 20 cm × 20 cm on scale 1 : 10,000 having overlaps 60% and 30%, is

A. 0.50 sq km
B. 0.56 sq km
C. 0.60 sq km
D. 0.64 sq km

Question 287

Spring tides are caused when

A. Sun and moon are in line with earth
B. Solar tidal force acts opposite to lunar tidal force
C. Solar tidal force and lunar tidal force both coincide
D. None of these

Question 288

Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year

A. Once
B. Twice
C. Thrice
D. Four times

Question 289

The time interval between successive transits of the moon, is

A. 24 hours 10 minutes
B. 20 hours 25 minutes
C. 24 hours 50 minutes
D. 23 hours 50 minutes

Question 290

If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to

A. d
B. 1/d
C. d2
D. 1/d2

Question 291

A star in northern sphere is said to transit

A. When its altitude is maximum
B. When its azimuth is 180°
C. When it is in south
D. All the above

Question 292

Normal tension is that pull which

A. is used at the time of standardising the tape
B. neutralizes the effect due to pull and sag
C. makes the correction due to sag equal to zero
D. makes the correction due to pull equal to zero

Question 293

After fixing the plane table to the tripod, the main operations which are needed at each plane table station are (i) Levelling (ii) Orientation (iii) CenteringThe correct sequence of these operations is

A. (i), (ii), (iii)
B. (i), (iii), (ii)
C. (iii), (i), (ii)
D. (ii), (iii), (i)

Question 294

The rate of change of parallax dp/dh with respect to change in h, may be expressed as

A. fB/(H - h)
B. fB/(H - h)²
C. fB/(H + h)
D. fB/(H + h)²

Question 295

For accurate work, the steel band should always be used in preference to chain because the steel band

A. is lighter than chain
B. is easier to handle
C. is practically inextensible and is not liable to kinks when in use
D. can be easily repaired in the field

Question 296

Sidereal day

A. Is the period of time taken by the earth in making a complete rotation with reference to stars
B. Is slightly shorter than an ordinary solar day
C. Is divided into the conventional hours, minutes and seconds
D. All the above

Question 297

In a tropical year, the numbers of sidereal days are

A. 365
B. 365.2224
C. 365.2422
D. 366.2422

Question 298

In a tropical year, the numbers of sidereal days are

A. One less than mean solar days
B. One more than mean solar days
C. Equal to mean solar days
D. None of these

Question 299

The point on the celestial sphere vertically below the observer's position, is called

A. Zenith
B. Celestial point
D. Pole

Question 300

The type of surveying which requires least office work is

A. tacheomefry
B. trigonometrical levelling
C. plane table surveying
D. theodolite surveying

Question 301

During chaining along a straight line, the . leader of the party has 4 arrows in his hand while the follower has 6. Distance of the follower from the starting point is

A. 4 chains
B. 6 chains
C. 120 m
D. 180m

Question 302

The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be

A. equidistant from A and B
B. closer to the higher station
C. closer to the lower station
D. as far as possible from the line AB

Question 303

Subtense bar is an instrument used for

A. levelling
B. measurement of horizontal distances in plane areas
C. measurement of horizontal distances in undulated areas
D. measurement of angles

Question 304

Cross staff is an instrument used for

A. measuring approximate horizontal angles
B. setting out right angles
C. measuring bearings of the lines
D. none of the above

Question 305

Theodolite is an instrument used for

A. tightening the capstan-headed nuts of level tube
B. measurement of horizontal angles only
C. measurement of vertical angles only
D. measurement of both horizontal and vertical angles

Question 306

Systematic errors

A. Always follow some definite mathematical law
B. Can be removed by applying corrections to the observed values
C. Are also known as cumulative errors
D. All the above

Question 307

In a spherical triangle ABC, right angled at C, sin b equals

A. sin a cos A
B. cos a sin A
C. tan a cot A
D. cot A tan a

Question 308

Pick up the correct statement from the following:

A. The plane passing through the perspective centre of a stereo pair and a ground point, is known as basal plane
B. Each pair of image points on stereo pair have their own basal plane
C. Relative orientation means reconstructing the basal plane
D. All the above

Question 309

Pick up the correct statement from the following:

A. The principal point coincides with plumb point on a true vertical photograph
B. The top of a hill appears on a truly vertical photograph at greater distance than its bottom from the principal point
C. The top of a hill is represented on a vertical photograph at larger scale than the area of a nearby valley
D. All the above

Question 310

On vertical photographs, height displacement is

A. Positive for points above datum
B. Negative for points below datum
C. Zero for points vertically below the air station
D. All the above

Question 311

The First Point of Aeries

A. Is the point in the celestial sphere where zero meridian crosses the celestial equator
B. Is usually denoted by the Greek letter ?
C. Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
D. All the above

Question 312

The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called

B. intersection
C. resection
D. traversing

Question 313

If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated

A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate

Question 314

The position of a heavenly body on the celestial sphere can be completely specified by

A. Its altitude and azimuth
B. Its declination and hour angle
C. Its declination and right ascension
D. All the above

Question 315

The want of correspondence in stereo-photographs

A. Is a good property
B. Is a function of tilt
C. Is not affected by the change of flying height between photographs
D. Is minimum when θ is 3°

Question 316

If two points differing by 1° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about

A. 10 km
B. 25 km
C. 30 km
D. 50 km

Question 317

With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be

A. 7 h 00 m
B. 7 h 30 m
C. 8 h 00 m
D. 9 h 00 m

Question 318

In a truly vertical photograph,

A. Principal point coincides the isocenter
B. Iso-centre coincides the plumb point
C. Plumb point coincides the principal point
D. All the above

Question 319

Polaris is usually observed for the determination of the latitude when it is

A. At culmination
B. At elongation
C. Neither at culmination nor at elongation
D. Either at culmination or at elongation

Question 320

The parallax of a point on the photograph is due to

A. Ground elevation
B. Flying height
C. Length of air base
D. All the above

Question 321

To have greatest coverage of the area, the type of photography used, is

A. High oblique
B. Low oblique
C. Vertical
D. None of these

Question 322

Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

A. Measuring angle and distance from one transit station
B. Measuring angles to the point from at least two stations
C. Measuring angle at one station and distance from other
D. Measuring distance from two points on traverse line

Question 323

Horizontal distances obtained by thermometric observations

A. require slope correction
B. require tension correction
C. require slope and tension corrections
D. do not require slope and tension corrections

Question 324

If 16 flight lines are run perpendicular to an area 30 km wide, their spacings on a photographical map on scale 1 : 50,000 , will be

A. 1 cm
B. 2 cm
C. 3 cm
D. 4 cm

Question 325

Which of the following methods of contouring is most suitable for a hilly terrain?

A. Direct method
B. Square method
C. Cross-sections method
D. Tachometric method

Question 326

The size of a plane table is

A. 750 mm × 900 mm
B. 600 mm × 750 mm
C. 450 mm × 600 mm
D. 300 mm × 450 mm

Question 327

The angle between the plane of the equator and the plane of the ecliptic, is known as obliquity of the ecliptic and its value is

A. 22° 30'
B. 23° 27'
C. 23° 30'
D. 24° 0'

Question 328

For a tacheometer the additive and multi-plying constants are respectively

A. 0 and 100
B. 100 and 0
C. 0 and 0
D. 100 and 100

Question 329

From the principal point the horizon point lies on the principal line at a distance of

A. f tan θ
B. f sin θ
C. f cot θ
D. f cos θ

Question 330

If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is

A. 77° N
B. 23° S
C. 13° E
D. 13° W

Question 331

Overturning of vehicles on a curve can be avoided by using

A. compound curve
B. vertical curve
C. reverse curve
D. transition curve

Question 332

The error due to eccentricity of inner and outer axes can be eliminated by

A. reading both verniers and taking the mean of the two
B. taking both face observations and taking the mean of the two
C. double sighting
D. taking mean of several readings distributed over different portions of the graduated circle

Question 333

The Polaris remains below horizon at

A. 10° N
B. 50° N Latitude
C. Equator
D. 5° S latitude

Question 334

Three point problem can be solved by

A. Tracing paper method
B. Bessels method
C. Lehman’s method
D. all of the above

Question 335

The zenith is the point on the celestial sphere

A. East of observer
B. West of observer
C. North of observer
D. South of observer

Question 336

The allowable length of an offset depends upon the

A. degree of accuracy required
B. method of setting out the perpendiculars and nature of ground
C. scale of plotting
D. all of the above

Question 337

The great circle whose plane is perpendicular to the axis of rotation of the earth, is called

A. Equator
B. Terrestrial equator
C. 0° latitude
D. All the above