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
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 2
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 3
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 4
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 5
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 6
A metallic tape is made of
A. steel
B. invar
C. linen
D. cloth and wires
Question 7
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 8
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 9
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 10
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 11
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 12
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 13
Overturning of vehicles on a curve can be avoided by using
A. compound curve
B. vertical curve
C. reverse curve
D. transition curve
Question 14
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 15
An ideal vertical curve to join two gradients, is
A. circular
B. parabolic
C. elliptical
D. hyperbolic
Question 16
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 17
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 18
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 19
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 20
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 21
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 22
The angle of intersection of the two plane mirrors of an optical square is
A. 30°
B. 45°
C. 60°
D. 90°
Question 23
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 24
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 25
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 26
The Polaris describes a small circle round the pole whose radius is approximately
A. 1°
B. 2°
C. 3°
D. 4°
Question 27
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 28
Three point problem can be solved by
A. Tracing paper method
B. Bessels method
C. Lehman’s method
D. all of the above
Question 29
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 30
The maximum tolerance in a 20 m chain is
A. ±2 mm
B. ±3 mm
C. ±5 mm
D. ±8 mm
Question 31
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 32
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 33
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 34
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 35
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 36
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 37
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
D. contour gradient
Question 38
A bearing of a line is also known as
A. magnetic bearing
B. true bearing
C. azimuth
D. reduced bearing
Question 39
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 40
The principal plane contains
A. Nadir point
B. Iso-centre
C. Principal point
D. All the above
Question 41
One of the tacheometric constants is additive, the other constant, is
A. subtractive constant
B. multiplying constant
C. dividing constant
D. indicative constant.
Question 42
The Polaris remains below horizon at
A. 10° N
B. 50° N Latitude
C. Equator
D. 5° S latitude
Question 43
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 44
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
A. NE quadrant
B. SE quadrant
C. NW quadrant
D. SW quadrant
Question 45
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 46
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 47
Parallax bar measures
A. Parallax
B. Height
C. Parallax difference
D. Height difference
Question 48
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 49
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 50
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 51
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 52
A series of closely spaced contour lines represents a
A. steep slope
B. gentle slope
C. uniform slope
D. plane surface
Question 53
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 54
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 55
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 56
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 57
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 58
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 59
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 60
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 61
The distance between the projection centre and the photograph, is called
A. Principal distance
B. Principal line
C. Isocentric distance
D. Focal length
Question 62
The instrument used for accurate centering in plane table survey is
A. spirit level
B. alidade
C. plumbing fork
D. trough compass
Question 63
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 64
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 65
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 66
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 67
If the length of a chain is found to be short on testing, it can be adjusted by
A. straightening the links
B. removing one or more small circular rings
C. closing the joints of the rings if opened out
D. all of the above
Question 68
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 69
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 70
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 71
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 72
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 73
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 74
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 75
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 76
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 77
At western elongation, the pole star moves
A. Eastward
B. Westward
C. Northward
D. Southward
Question 78
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 79
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 80
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 81
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 82
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 83
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 84
Homologous point is
A. Photo principal point
B. Ground principal point
C. Ground isocenter
D. All the above
Question 85
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 86
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 87
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 88
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 89
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 90
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 91
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 92
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 93
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 94
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 95
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 96
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 97
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
Question 98
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 99
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 100
The correction for sag is
A. always additive
B. always subtractive
C. always zero
D. sometimes additive and sometimes subtractive
Question 101
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 102
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 103
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 104
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 105
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 106
The coverage is least if photography is
A. High oblique
B. Low oblique
C. Vertical
D. None of these
Question 107
The probable error of the adjusted bearing at the middle is
A. rn
B. rn
C. rn
D. rn.
Question 108
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 109
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 110
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 111
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 112
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 113
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 114
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 115
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 116
The main object of the astronomer to obtain
A. Astronomical latitude
B. Astronomical longitude
C. Astronomical bearing
D. All of these
Question 117
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 118
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 119
Hydrographic surveys deal with the mapping of
A. large water bodies
B. heavenly bodies
C. mountaineous region
D. canal system
Question 120
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 121
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 122
At lower culmination, the pole star moves
A. Eastward
B. Westward
C. Northward
D. Southward
Question 123
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 124
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 125
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 126
In an internal focussing type of telescope, the lens provided is
A. concave
B. convex
C. plano-convex
D. plano-concave
Question 127
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 128
Sensitiveness of a level tube is designated by
A. radius of level tube
B. length of level tube
C. length of bubble of level tube
D. none of the above
Question 129
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 130
Accuracy of 'fix' by two point problem, is
A. bad
B. good
C. not reliable
D. unique.
Question 131
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 132
Which of the following is not used in measuring perpendicular offsets ?
A. line ranger
B. steel tape
C. optical square
D. cross staff
Question 133
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 134
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 135
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 136
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 137
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 138
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 139
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 140
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 141
The moon rotates round the earth once in every
A. 29 days
B. 29.35 days
C. 29.53 days
D. 30 days
Question 142
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 143
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 144
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 145
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 146
At eastern elongation, the pole star moves
A. Eastward
B. Westward
C. Northward
D. Southward
Question 147
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 148
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 149
The principal line is the line joining the principal point and
A. Nadir
B. Isocenter
C. Perspective centre
D. None of these
Question 150
The type of surveying which requires least office work is
A. tacheomefry
B. trigonometrical levelling
C. plane table surveying
D. theodolite surveying
Question 151
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 152
For a well-conditioned triangle, no angle should be less than
A. 20°
B. 30°
C. 45°
D. 60°
Question 153
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 154
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 155
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 156
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 157
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 158
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 159
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 160
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 161
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 162
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 163
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 164
The orthogonal projection of the perspective centre on a tilted photograph, is called
A. Nadir
B. Isocenter
C. Principal point
D. Plumb point
Question 165
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 166
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 167
The smaller horizontal angle between the true meridian and a survey line, is known
A. Declination
B. Bearing
C. Azimuth
D. Dip
Question 168
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 169
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 170
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 171
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 172
Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ?
A. radiation
B. intersection
C. traversing
D. resection
Question 173
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 174
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 175
Stellar astronomy deals with
A. Plane surveying
B. Geodetic surveying
C. Star observations
D. Planet observations
Question 176
Closed contours, with higher value inwards, represent a
A. depression
B. hillock
C. plain surface
D. none of the above
Question 177
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 178
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 179
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 180
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 181
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 182
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 183
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 184
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 185
The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called
A. radiation
B. intersection
C. resection
D. traversing
Question 186
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 187
In a tropical year, the numbers of sidereal days are
A. 365
B. 365.2224
C. 365.2422
D. 366.2422
Question 188
An aerial photograph may be assumed as
A. Parallel projection
B. Orthogonal projection
C. Central projection
D. None of these
Question 189
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 190
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 191
In field astronomy, the quantities observed are entirely
A. Lengths
B. Angles
C. Heights
D. All of these
Question 192
‘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 193
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 194
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 195
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 196
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 197
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 198
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 199
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 200
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 201
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 202
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 203
Perspective centre relates to
A. Parallel projection
B. Orthogonal projection
C. Central projection
D. None of these
Question 204
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 205
The normal longitudinal overlap is generally kept
A. 50 %
B. 60 %
C. 70 %
D. 75 %
Question 206
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 207
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 208
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 209
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 210
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 211
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 212
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 213
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 214
The point on the celestial sphere vertically below the observer's position, is called
A. Zenith
B. Celestial point
C. Nadir
D. Pole
Question 215
Different grades are joined together by a
A. Compound curve
B. Transition curve
C. Reverse curve
D. Vertical curve
Question 216
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 217
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 218
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 219
Closed contours of decreasing values towards their centre, represent
A. a hill
B. a depression
C. a saddle or pass
D. a river bed.
Question 220
Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
A. 24 %
B. 36 %
C. 40 %
D. 60 %
Question 221
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 222
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 223
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 224
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 225
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 226
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 227
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 228
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 229
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 230
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 231
With the rise of temperature, the sensitivity of a bubble tube
A. decreases
B. increases
C. remains unaffected
D. none of the above
Question 232
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 233
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 234
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 235
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 236
Detailed plotting is generally done by
A. radiation
B. traversing
C. resection
D. all of the above
Question 237
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 238
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 239
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 240
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 241
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 242
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 243
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 244
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 245
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 246
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 247
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 248
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 249
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 250
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 251
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 252
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 253
Benchmark is established by
A. hypsometry
B. barometric levelling
C. spirit levelling
D. trigonometrical levelling
Question 254
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 255
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 256
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 257
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 258
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 259
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 260
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 261
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 262
Rotation of the camera at exposure about its vertical axis, is known as
A. Swing
B. Tilt
C. Tip
D. None of these
Question 263
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 264
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 265
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 266
Intersection method of detailed plotting is most suitable for
A. forests
B. urban areas
C. hilly areas
D. plains
Question 267
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 268
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 269
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 270
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 271
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
C. Nadir point
D. Isocenter
Question 272
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 273
Agate cap is fitted with a
A. cross staff
B. level
C. chain
D. prismatic compass
Question 274
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 275
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 276
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 277
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 278
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 279
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 280
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 281
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 282
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 283
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 284
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 285
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 286
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 287
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 288
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 289
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 290
The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called
A. Rational horizon
B. True horizon
C. Celestial horizon
D. All the above
Question 291
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 292
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 293
Triangulation surveys are carried out for providing
A. Planimetric control
B. Height control
C. Both planimetric and height control
D. None of these
Question 294
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 295
For which of the following permanent adjustments of theodolite, the spire test is used ?
A. adjustment of plate levels
B. adjustment of line of sight
C. adjustment of horizontal axis
D. adjustment of altitude bubble and vertical index frame
Question 296
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 297
The two point problem and three point problem are methods of
A. resection
B. orientation
C. traversing
D. resection and orientation
Question 298
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 299
The station pointer is generally used in
A. Triangulation surveying
B. Astronomical surveying
C. Hydrographical surveying
D. Photogrammetric surveying
Question 300
The average eye base is assumed as
A. 58 mm
B. 60 mm
C. 62 mm
D. 64 mm
Question 301
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 302
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 303
The number of horizontal cross wires in a stadia diaphragm is
A. one
B. two
C. three
D. four
Question 304
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 305
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 306
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 307
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 308
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 309
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 310
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 311
At upper culmination, the pole star moves
A. Eastward
B. Westward
C. Northward
D. Southward
Question 312
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 313
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 314
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 315
The solar tidal force divided by lunar tidal force is
A. 1-3
B. 1-2
C. 3-4
D. 5-4
Question 316
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 317
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 318
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 319
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 320
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 321
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 322
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 323
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 324
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 325
An imaginary line joining the points of equal elevation on the surface of the earth, represents
A. contour surface
B. contour gradient
C. contour line
D. level line
Question 326
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 327
The method of surveying by triangulation was first introduced by the Dutchman Snell in
A. 1600
B. 1615
C. 1630
D. 1650
Question 328
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 329
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 330
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 331
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 332
Longitudes are measured from 0° to
A. 180° eastward
B. 180° westward
C. 180° east or westward
D. 360° eastward
Question 333
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 334
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 335
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 336
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 337
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 338
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