civil engineering MCQs – Page 185

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 Review each marked answer and report any item that may be outdated or unclear.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
3681. Compared to mild steel, cast iron has (1) high compressive strength (2) high tensile strength (3) low compressive strength (4) low tensile strength The correct answer is_________________?
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A. (2) and (3)

B. (3) and (4)

C. (1)and(4)

D. (1) and (2)

3682. The horizontal timber piece provided at the apex of a roof truss which supports the common rafter is called______________?
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A. eaves board

B. hip rafter

C. valley rafter

D. ridge board
3683. The type of footing which is used to transmit heavy loads through steel columns is_______________?
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A. isolated footing

B. well foundation

C. grillage foundation

D. raft foundation

3684. The number of steps in a flight generally should not be less than________________?
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A. 3

B. no limit

C. 2

D. 5

3685. For a loose sand sample and a dense sand sample consolidated to the same effective stress_____________?
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A. ultimate strength is different but peak strength is same

B. ultimate strength is same but peak strength of dense sand is greater than that of loose sand

C. ultimate strength is same and also peak strength is same

D. ultimate strength is same but peak

3686. Which of the following is a measure of particle size range ?
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A. coefficient of curvature

B. none of the above

C. uniformity coefficient

D. effective size

3687. A fully saturated soil is said to be________________?
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A. two phase system with soil and water

B. three phase system

C. two phase system with soil and air

D. one phase system

3688. Time factor for a clay layer is_______________?
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A. independent of thickness of clay layer

B. inversely proportional to drainage path

C. a dimensional parameter

D. directly proportional to permeability of soil
3689. Highway Research Board (HRB) classification of soils is based on__________________?
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A. particle size composition

B. plasticity characteristics

C. both particle size composition and plasticity characteristics

D. none of the above

3690. If the water table rises upto ground surface, then the___________________?
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A. total stress is increased due to de-crease in pore water pressure but effective stress does not change

B. total stress is reduced due to increase in pore water pressure only but effec-tive stress does not change

C. effective stress is reduced due to increase in pore water pressure only but total stress does not change

D. effective stress is reduced due to decrease in total stress only but pore water pressure does not change

3691. In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be_________________?
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A. between 300 mm and 750 mm

B. greater than 1 m

C. between 750 mm and 1 m

D. less than 300 mm

3692. The total discharge from two wells situated near to each other is_________________?
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A. greater than the sum of the discharges from individual wells

B. less than the sum of the discharges from individual wells

C. equal to larger of the two discharges from individual wells

D. sum of the discharges from individual wells

3693. Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is_________________?
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A. 6 months

B. 3 months

C. 12 months

D. 24 months

3694. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to_______________?
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A. 1.5 m

B. 3m

C. 2.0 m

D. 1.0m

3695. Uniformity coefficient of a soil is__________________?
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A. always less than 1

B. equal to or less than 1

C. always equal to 1

D. equal to or gi eater than 1
3696. The ultimate consolidation settlement of a soil is________________?
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A. directly proportional to the voids ratio

B. directly proportional to the compression index

C. inversely proportional to the compression index

D. none of the above

3697. Select the correct statement?
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A. Unit weight of soil increases due to submergence in water

B. Unit weight of dry soil is greater than unit weight of wet soil

C. Unit weight of soil decreases due to submergence in water

D. For dry soils, dry unit weight is less than total unit weight

3698. Rise of water table in cohesionless soils upto ground surface reduces the net ultimate bearing capacity approximately by________________?
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A. 90%

B. 50%

C. 25%

D. 75%

3699. Allowable bearing pressure for a foundation depends upon_______________?
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A. allowable settlement only

B. ultimate bearing capacity of soil only

C. both allowable settlement and ultimate bearing capacity

D. none of above

3700. If the voids of a soil mass are full of air only, the soil is termed as_______________?
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A. air entrained soil

B. dry soil

C. partially saturated soil

D. dehydrated soil