civil engineering Mcqs
4751. As compared to ordinary portland cement, use of pozzuolanic cement_______________?
comments icon0
A. increases shrinkage

B. reduces workability

C. increases strength

D. increases bleeding

4752. The limits of percentage p of the longitudinal reinforce-ment in a column is given by_____________?
comments icon0

A. 0.15% to 2%

B. 0.8% to 4%

C. 0.8% to 8%

D. 0.8% to 6%
4753. For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankines theory_______________?
comments icon0

A. is always greater than 1

B. can be less than 1

C. is always less than 1

D. can be more than 1

4754. For walls, columns and vertical faces of all structural members, the form work is generally removed after______________?
comments icon0
A. 24 to 48 hours

B. 7 days

C. 14 days

D. 3 days

4755. For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be________________?
comments icon0
A. above 0.92

B. 0.75-0.80

C. 0.80-0.85

D. 0.85 0.92

4756. The average permissible stress in bond for plain bars in tension is_______________?
comments icon0
A. increased by 25% for bars in compression

B. decreased by 10% for bars in compression

C. decreased by 25% for bars in compression

D. increased by 10% for bars in compression

4757. Admixtures which cause early setting, and hardening of concrete are called_______________?
comments icon0

A. retarders

B. accelerators

C. workability admixtures

D. air entraining agents

4758. For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be________________?
comments icon0

A. 900 mm

B. 750 mm

C. more than 1 m

D. 600 mm

4759. Increase in the moisture content in concrete_________________?
comments icon0

A. all of the above

B. does not change the strength

C. reduces the strength

D. increases the strength

4760. As compared to ordinary portland cement, high alumina cement has______________?
comments icon0
A. higher initial setting time but lower final setting time

B. lower initial and final setting times

C. lower initial setting time but higher final setting time

D. higher initial and final setting times

4761. To minimise the effect of differential settlement, the area of a footing should be designed for______________?
comments icon0

A. live load + fraction of dead load

B. dead load only

C. dead load + live load

D. dead load + fraction of live load
4762. The approximate value of the ratio between direct tensile strength and flexural strength is_____________?
comments icon0

A. 0.75

B. 0.5

C. 1

D. 0.33

4763. One of the criteria for the effecvve width of flange of T-beam is bf =+ bw +6Df 6 In above formula, l0 signifies_______________?
comments icon0

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

4764. 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_______________?
comments icon0
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

4765. Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is_______________?
comments icon0
A. 32 liters

B. 28 liters

C. 30 liters

D. 34 liters

4766. For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is__________________?
comments icon0
A. 75 mm

B. 50 mm

C. 100 mm

D. 120 mm

4767. The factor of safety for______________?
comments icon0

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

4768. The minimum cover to the ties or spirals should not be less than________________?
comments icon0

A. 50mm

B. 20 mm

C. 25 mm

D. 15 mm

4769. The ratio of the diameter of reinforcing bars and the slab thickness is_______________?
comments icon0

A. 4-Jan

B. 1/8

C. 5-Jan

D. 6-Jan

4770. Approximate value of shrinkage strain in concrete, is________________?
comments icon0

A. 0.00003

B. 0.03

C. 0.0003

D. 0.003

4771. The permissible diagonal tensile stress in reinforced brick work is_____________?
comments icon0

A. about 1.0 N/mm2

B. 0.3 N/mm2 to 0.7 N/mm2

C. about 0.1 N/mm2

D. zero

4772. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?
comments icon0
A. 5% more

B. 5% less

C. 10% more

D. 10% less

4773. The strength of concrete after one year as compared to 28 days strength is about_______________?
comments icon0

A. 10 to 15% more

B. 15 to 20% more

C. 25 to 50% more

D. 20 to 25% more
4774. According to IS : 456- 1978, minimum slenderness ratio for a short column is_______________?
comments icon0

A. less than 18

B. between 18 and 24

C. less than 12

D. more than 24

4775. For the design of retaining walls, the minimum factor of safety against overturning is taken as_____________?
comments icon0

A. 3

B. 2.5

C. 2.0

D. 1.5

4776. 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___________________?
comments icon0

A. 0.45 d

B. 0.35 d

C. 0.40 d

D. dependent on grade of concrete also

4777. The most commonly used admixture which prolongs the setting and hardening time is_______________?
comments icon0
A. gypsum

B. all of the above

C. calcium chloride

D. sodium silicate

4778. For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is______________?
comments icon0

A. 4 m

B. 4.5 m

C. 3.5 m

D. 5 m

4779. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________?
comments icon0

A. tcr rcs = tct

B. fcr<fcs

C. fc5>fcr>fC

D. fcr>fcs>fc
4780. If the storey height is equal to length of RCC wall, the percentage increase in strength is_____________?
comments icon0

A. 0

B. 30

C. 20

D. 10
4781. In counterfort retaining walls, the main reinforcement in the stem at support is_______________?
comments icon0

A. not provided

B. provided only on inner face

C. provided only on front face

D. provided both on inner and front faces

4782. Workability of concrete is directly proportional to________________?
comments icon0

A. all of above

B. grading of the aggregate

C. aggregate cement ratio

D. time of transit

4783. Poissons ratio for concrete_______________?
comments icon0

A. none of the above

B. decreases with richer mixes

C. increases with richer mixes

D. remains constant

4784. If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are__________________?
comments icon0

A. 1.5 m and 3.0 m

B. 3.0 m and 1.5 m

C. 1.5 m and 1.5 m

D. 3.0 m and 3.0 m
4785. Critical section for shear in case of flat slabs is at a distance of_______________?
comments icon0
A. d/2 from periphery of column/capital/ drop panel

B. effective depth of slab from periphery of column/drop panel

C. at the drop panel of slab

D. at the periphery of column

4786. According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as______________?
comments icon0

A. Ec = where fck N/mm2 = 700 is the characteristic strength in

B. Ec = = 570

C. Ec = = 5700fck

D. Ec = = 5700
4787. The relation between modulus of rupturefcr and characteristic strength of concrete fck is given by_______________?
comments icon0

A. fcr=1.2Vf7

B. fcr=0.57f7

C. fcr=0.7Vf7

D. re fcr and fck are in N/mm2?

E. fcr=0.35Vf7

4788. The individual variation between test strength of sample should not be more than______________?
comments icon0

A. 5% of average

B. 20% of average

C. 15% of average

D. 10% of average

4789. According to IS: 456-1978, the maximum reinforcement in a column is_____________?
comments icon0

A. 8%

B. 6 %

C. 4%

D. 2%

4790. If a beam fails in bond, then its bond strength can be increased most economi-cally by___________?
comments icon0

A. increasing the depth of beam

B. using thinner bars but more in number

C. using thicker bars but less in number

D. providing vertical stirrups

4791. While designing the pile as a column, the end conditions are nearly_______________?
comments icon0

A. both ends hinged

B. both ends fixed

C. one end fixed and other end hinged

D. one end fixed and other end free

4792. If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?
comments icon0

A. Tv + Tc

B. xv TC

C. xv

D. xc

4793. For walls, columns and vertical faces of all structural members, the form work is generally removed after_______________?
comments icon0

A. 3 days

B. 7 days

C. 14 days

D. 24 to 48 hours
4794. The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is______________?
comments icon0

A. provided more on inner face than on front face

B. provided more on front face than on inner face

C. not needed

D. provided equally on inner and front faces

4795. A T-shaped retaining wall mainly conssits of_________________?
comments icon0

A. one cantilever

B. four cantilevers

C. three cantilevers

D. two cantilevers

4796. Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to________________?
comments icon0

A. re 1 is the span

B. 10-Jan

C. 5-Jan

D. 3-Jan

E. 1/7
4797. In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on_______________?
comments icon0
A. front face only

B. inner face only

C. both front face and inner face

D. none of the above

4798. The minimum cover in a slab should neither be less than the diameter of bar nor less than_______________?
comments icon0
A. 15 mm

B. 13 mm

C. 25 mm

D. 10 mm

4799. Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?
comments icon0
A. M15

B. M20

C. M 10

D. M25

4800. Lap length in compression shall not be less than______________?
comments icon0

A. 20

B. 15 4>

C. 30 (j)

D. 24 (j)