civil engineering MCQs – Page 239

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs

4761. The approximate value of the ratio between direct tensile strength and flexural strength is_____________?
0

A. 0.75

B. 0.5

C. 1

D. 0.33

4762. One of the criteria for the effecvve width of flange of T-beam is bf =+ bw +6Df 6 In above formula, l0 signifies_______________?
0

A. clear span of the T-beam

B. effective span of T-beam

C. distance between points of zero moments in the beam

D. distance between points of maximum moments in the beam

4763. If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section_______________?
0

A. depends on as, only

B. depends on aCbC only

C. depends on both crst and acbc

D. is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bending compression

4764. Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is_______________?
0

A. 32 liters

B. 28 liters

C. 30 liters

D. 34 liters

4765. For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is__________________?
0

A. 75 mm

B. 50 mm

C. 100 mm

D. 120 mm

4766. The factor of safety for______________?
0

A. steel is higher than that for concrete

B. steel and concrete are same

C. steel is lower than that for concrete

D. none of the above

4767. The minimum cover to the ties or spirals should not be less than________________?
0

A. 50mm

B. 20 mm

C. 25 mm

D. 15 mm

4768. The ratio of the diameter of reinforcing bars and the slab thickness is_______________?
0

A. 4-Jan

B. 1/8

C. 5-Jan

D. 6-Jan

4769. Approximate value of shrinkage strain in concrete, is________________?
0

A. 0.00003

B. 0.03

C. 0.0003

D. 0.003

4770. The permissible diagonal tensile stress in reinforced brick work is_____________?
0

A. about 1.0 N/mm2

B. 0.3 N/mm2 to 0.7 N/mm2

C. about 0.1 N/mm2

D. zero

4771. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?
0

A. 5% more

B. 5% less

C. 10% more

D. 10% less

4772. The strength of concrete after one year as compared to 28 days strength is about_______________?
0

A. 10 to 15% more

B. 15 to 20% more

C. 25 to 50% more

D. 20 to 25% more

4773. According to IS : 456- 1978, minimum slenderness ratio for a short column is_______________?
0

A. less than 18

B. between 18 and 24

C. less than 12

D. more than 24

4774. For the design of retaining walls, the minimum factor of safety against overturning is taken as_____________?
0

A. 3

B. 2.5

C. 2.0

D. 1.5

4775. If the permissible stress in steel in tension is 140 N/mm2, then the depth of neutral axis for a singly reinforced rectangular balanced section will be___________________?
0

A. 0.45 d

B. 0.35 d

C. 0.40 d

D. dependent on grade of concrete also

4776. The most commonly used admixture which prolongs the setting and hardening time is_______________?
0

A. gypsum

B. all of the above

C. calcium chloride

D. sodium silicate

4777. For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is______________?
0

A. 4 m

B. 4.5 m

C. 3.5 m

D. 5 m

4778. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________?
0

A. tcr rcs = tct

B. fcr<fcs

C. fc5>fcr>fC

D. fcr>fcs>fc

4779. If the storey height is equal to length of RCC wall, the percentage increase in strength is_____________?
0

A. 0

B. 30

C. 20

D. 10

4780. In counterfort retaining walls, the main reinforcement in the stem at support is_______________?
0

A. not provided

B. provided only on inner face

C. provided only on front face

D. provided both on inner and front faces

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