# Structural Design Specifications MCQ Questions & Answers

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

Question 1

For the reinforced concrete member totally immersed in sea water, the normal cover provided for the reinforcing bars is further increased by

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

Question 2

For heavily reinforced concrete member, the nominal maximum size of the aggregates should be restricted to

A. 5 mm less than the minimum clear distance between the main bars
B. 5 mm less than the minimum cover to the reinforcement
C. smaller of (a) and (b)
D. greater of (a) and (b)

Question 3

If the dimensions of a rectangular section of a short column are 15 cm x 20 cm, its unsupported length should be restricted to

A. 9.0 m
B. 10.0 m
C. 11.0 m
D. 12.0 m

Question 4

For the plain reinforcing bars in compression, the permissible design bond stress in tension, is increased by

A. 10%
B. 15%
C. 20%
D. 25%

Question 5

The grade of plain concrete to be used in sea water or structures exposed to sea water, should be

A. M lO
B. M 15
C. M 20
D. M 30

Question 6

In compression members, the lap length of a bar should not be less than

A. 12 φ
B. 16 φ
C. 20 φ
D. 24 φ

Question 7

For battened struts, the effective length is increased by

A. 5%
B. 7.50%
C. 10%
D. 12.50%

Question 8

A continuous beam shall be deemed to be a deep beam if the ratio of its effective span to overall depth, is

A. 2
B. 2.5
C. less than 2
D. less than 2.5

Question 9

The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least

A. 01-Mar
B. 01-Feb
C. 03-Feb
D. 2

Question 10

Pick up the incorrect statement from the following:

A. The gross section of the web of rolled I-beams is the depth of the beam multiplied by the web thickness
B. The gross section of the web of channels is the depth of the web multiplied by its thickness
C. The gross section of the web of plate girders is the depth of the web plate multiplied by its thinkness
D. None of these.

Question 11

The outstand of stiffeners should be (where t is the thickness of flat).

A. 6 t
B. 8 t
C. 10 t
D. 12 t

Question 12

The maximum deflection of a structure should not normally exceed lesser of the span/350 or

A. 10 mm
B. 15 mm
C. 20 mm
D. 25 mm

Question 13

In case of continuous beams, the distance between the points of zero moment, may be obtained as (where l is the effective span).

A. 0.5 l
B. 0.6 l
C. 0.7 l
D. 0.8 l

Question 14

The grade of concrete generally not used in the reinforced concrete, is

A. M 10
B. M 15
C. M 20
D. M 40

Question 15

The maximum area of compression reinforcement in a beam of cross section B x D is limited to

A. 0.02 BD
B. 0.03 BD
C. 0.04 BD
D. 0.05 BD

Question 16

Moist curing of the exposed surfaces of concrete is done at least for

A. 3 days
B. 5 days
C. 7 days
D. 14 days

Question 17

The creep coefficient i.e. the ratio of ultimate creep and elastic strain after

A. 7 days is 2.2
B. 28 days is 1.6
C. 365 days is 1.1
D. all the above.

Question 18

The minimum pitch i.e., the distance between centres of rivet holes is not less than

A. 1.5 times the hole diameter
B. 2.0 times the hole diameter
C. 2.5 times the hole diameter
D. 3.0 times the hole diameter

Question 19

The test strength of the sample is taken as the average of the strength of

A. 2 specimens
B. 3 specimens
C. 4 specimens
D. 5 specimens

Question 20

The cover to the main reinforced may be reduced up to one third of the specified cover but not less than

A. 5 mm
B. 7 mm
C. 10 mm
D. 15 mm

Question 21

The slenderness ratio of single angle discontinuous struts conmected by a single rivet or bolt, shall not exceed

A. 110
B. 130
C. 150
D. 180

Question 22

The designed transverse shear in lacing is assumed as

Question 23

The distance between, rivet line and the nearest edge of a joint not exposed to weather, is taken (where t is thickness in mm of the thinner outside plate).

A. 6 t
B. 8 t
C. 10 t
D. 12 t

Question 24

For the stability of a structural part, the weight or anchorage should be

C. sum of (a) and (b)
D. none of these.

Question 25

For rolled I-beams and channels, permissible tensile and compressive stresses does not exceed

A. 1400 kg/cm2
B. 1500 kg/cm2
C. 1650 kg/cm2
D. 1800 kg/cm2

Question 26

The over all depth of a solid slab is 20 cm and effective depth is 15 cm. The horizontal distance between parallel main reinforcement should not be more than

A. 30 cm
B. 40 cm
C. 45 cm
D. 60 cm

Question 27

The depth 'd' of webs without horizontal stiffeners and consisting of tongue plates is taken lesser than the depth of the girder between the flanges less the sum of the depth of the tongue plates, and

A. eight times the sum of the thickness of tongue plates
B. six times the sum of the thickness of tongue plates
C. four times the sum of the thickness of tongue plates
D. None of the above.

Question 28

The concrete is deemed not to comply with the strength requirements if the strength is less than the greater of

A. characteristic strength minus 1.35 times the standard deviation
B. 0.8 times the characteristic strength
C. the average strength of all the samples is less than the characteristic strength plus times the standard deviation.
D. all the above.

Question 29

The reduced level of third floor of a building near a column is 205.350 m. The reduced levels of the undersides of four beams supporting the fourth floor framing into the column mutually perpendicular are 208.350 m, 208.450 m, 208.500 m and 208.550 m. The supported length of the column is

A. 3.000 m
B. 3.100 m
C. 3.150 m
D. 3.200 m

Question 30

If the ratio of effective span to overall depth of a simply supported beam is equal or greater than 1 but less than or equal to 2, the lever arm, is

A. 0.2 (l + 2D)
B. 0.3 (l + 3D)
C. 0.2 (l + 3D)
D. 0.3 (l + 2D)

Question 31

The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of

A. 7 N/mm2
B. 10 N/mm2
C. 20 N/mm2
D. 30 N/mm2

Question 32

The maximum compressive strength on 15 cm cubes of M 20 grade concrete at 7 days, should be a minimum of

A. 7 N/mm2
B. 10 N/mm2
C. 15 N/mm2
D. 20 N/mm2

Question 33

The effective and actual lengths of a cantilever are same if continuous at the support,

A. unstrained against torsion at the support and free at the end
B. with partial restraint against torsion of the support and free at the end
C. restrained against torsion at the support and free at the end
D. none of the these.