civil engineering MCQs – Page 29

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 Review each marked answer and report any item that may be outdated or unclear.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
561. Effective stress on soil_____________?
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A. increases voids ratio and decreases permeability

B. increases both voids ratio and permeability

C. decreases both voids ratio and permeability

D. decreases voids ratio and increases permeability

562. Which one of the following clays behaves like a dense sand ?
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A. over-consolidated ciay with a high over-consolidation ratio

B. normally consolidated clay

C. under-consolidated clay

D. over-consolidated clay with a low over-consolidation ratio

563. Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to_____________?
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A. deflect downward

B. deflect downward or upward

C. none of the above

D. deflect upward

564. Voids ratio of a soil mass can_________________?
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A. be zero

B. never be greater than unity

C. take any value greater than zero

D. take values between 0 and 1 only

565. At liquid limit, all soils possess________________?
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A. same shear strength of large magnitude

B. different shear strengths of large magnitude

C. same shear strength of small magnitude

D. different shear strengths of small magnitude

566. The flownet for an earthen dam with 30 m water depth consists of 25 potential drops and 5 flow channels. The coefficient of permeability of dam material is 0.03 mm/sec. The discharge per meter length of dam is________________?
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A. 0.00018 nrVsec

B. 0.1125m3/sec

C. 0.0045 m3/sec

D. 0.18m3/sec

567. Examine the following statements ___________?
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A. an style="color: #003f1a;">1. Factor of safety for steel should be based on its yield stress,
B. pan style="color: #003f1a;">4. Factor of safety for concrete should be based on its ultimate stress.
C. pan style="color: #003f1a;">2. Factor of safety for steel should be based on its ultimate stress,
D. pan style="color: #003f1a;">3. Factor of safety for concrete should be based on its yield stress,

E. correct statements are

568. To ensure uniform pressure distribution, the thickness of the foundation, is__________________?
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A. Increased gradually towards the edge

B. Decreased gradually towards the edge

C. Kept zero at the edge

D. Kept uniform throughout

569. The ratio of the diameter of reinforcing bars and the slab thickness is_______________?
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A. 1/8

B. 5-Jan

C. 6-Jan

D. 4-Jan

570. The permissible diagonal tensile stress in reinforced brick work is_____________?
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A. about 1.0 N/mm2

B. 0.3 N/mm2 to 0.7 N/mm2

C. about 0.1 N/mm2

D. zero

571. Sinking of an intermediate support of a continuous beam_____________?
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A. e="color: #003f1a;">2. increases the negative moment at support
B. e="color: #003f1a;">3. reduces the positive moment at center of span
C. e="color: #003f1a;">4. increases the positive moment at center of span

D. correct answer is?

E. ="color: #003f1a;">1. reduces the negative moment at support
572. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than________________?
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A. 3 diameters

B. One diameter

C. 2.5 diameters

D. 3.5 diameters

573. The maximum value of hoop compression in a dome is given by___________________?
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A. 2wR/d

B. wR/d

C. wR/2d

D. wR / 4d

574. For M 150 grade concrete (1:2:4) the moment of resistance factor is_________________?
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A. 5.8

B. 8.50

C. 0.87

D. 7.5

575. Coefficient of earth pressure at rest is__________________?
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A. less than active earth pressure but greater than passive earth pressure

B. greater than active earth pressure but less than passive earth pressure

C. greater than both the active earth pressure and passive earth pressure

D. less than both the active and passive earth pressures

576. Relative density of a compacted dense sand is approximately equal to_____________?
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A. 1.2

B. 0.95

C. 0.4

D. 0.6

577. The width of the flange of a L-beam, should be less than______________?
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A. Least of the above

B. Breadth of the rib + four times thickness of the slab

C. Breadth of the rib + half clear distance between ribs

D. One- sixth of the effective span

578. In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always________________?
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A. zero

B. compressive

C. tensile

D. tensile or compressive

579. Shrinkage of concrete depends upon_____________?
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A. an style="color: #003f1a;">1. humidity of atmosphere

B. correct answer is?

C. pan style="color: #003f1a;">2. passage of time
D. pan style="color: #003f1a;">3. stress
580. Select the correct statement?
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A. Uniformity coefficient does not affect strength and stability

B. A uniform soil has more strength and stability than a non-uniform soil

C. Uniformity coefficient of a poorly graded soil is more than that of a well graded soil

D. A uniform soil has less strength and stability than a non-uniform soil