civil engineering MCQs – Page 175

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 Review each marked answer and report any item that may be outdated or unclear.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

3481. The needle beam method of tunneling______________?
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A. ect the answer?

B. ) is suitable for brick lining

C. ) requires large number of trench jacks

D. i) is suitable for concrete lining

E. is suitable for soils in which roof can stand for few minutes without support

3482. The most suitable soil for compressed air tunneling is________________?
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A. silt

B. gravel

C. clay

D. sand

3483. In Belgium method of tunneling _________________?
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A. construction of invert and side walls is completed before roof arch is built

B. construction of side walls is completed before invert and roof arch are built

C. construction of invert is completed before side walls and roof arch are built

D. construction of roof arch is completed before side walls and invert are built

3484. As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?
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A. increases by 3.5 times

B. remains same

C. decreases

D. increases by 2.25 times

3485. The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?
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A. shot drill, churn drill, wagon drill

B. wagon drill, shot drill, churn drill

C. wagon drill, churn drill, shot drill

D. churn drill, wagon drill, shot drill

3486. In full face method of constructing tunnels, the first operation relates to______________?
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A. excavation of one drift in the centre

B. excavation being done along the periphery

C. removal of bottom portion

D. removal of top portion

3487. American method of tunneling________________?
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A. ect the correct answer?

B. ) requires heavy timbers

C. is no, suitable for railway or highway tunnels

D. is suitable for large sized tunnels

3488. Assertion A : When rock conditions are favorable, it will not be necessary to take up concrete lining concurrently with the driving operations till the full length of the tunnel has been driven through rock. Reason R : A tunnel through rock, hard or soft, does not need any concrete lining________________?
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A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is not the correct explanation of A

C. A is true but R is false

D. A is false but R is true

3489. Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
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A. timber

B. cement concrete

C. cast iron

D. stone masonry

3490. Which one of the following tunnelling methods is used for laying under ground sewers ?
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A. Needle beam method

B. Army method

C. German method

D. Italian method

3491. Drifters can be used to drill_________________?
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A. only up holes

B. horizontal or up holes

C. horizoral, down or up holes

D. only down holes

3492. What is the correct sequence of the following events of construction of a shaft in rock ?
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A. drilling and blasting

B. mucking

C. timbering

D. pumping

3493. In compressed air tunneling, the volume of free air provided is______________?
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A. 20 m3 per minute per m2 of face area

B. 6 m3 per minute per m2 of face area

C. 6 mJ per second per m2 of face area

D. 6 m3 per hour per m2 of face area

3494. Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V?
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A. ) Gable band is provided at top of gable masonry below the purlins,

B. i) The bands shall be to full width of the wall and not less than 7.5 cm in depth,

C. ) The bands shall be made of reinforced concrete only.

D. Lintel band is provided at lintel level on partition walls,

3495. A free standing brick wall 20 cm thick is subjected to a wind pressure of 75kg/m2. The maximum height of wall from stability consideration is___________________?
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A. 1.28 m

B. 1.5 m

C. 0.64 m

D. 0.96 m

3496. A high lime content in a composite cement-lime mortar results in______________?
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A. sider the following statements.

B. weaker mortar.

C. ect the correct statements.

D. slow hardening.

E. quick setting.

3497. Water retentivity for brick masonry should not be less than__________________?
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A. 80%

B. 60%

C. 70%

D. 50%

3498. Consider the following statements?
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A. ch of these statements are correct?

B. Masonry in rich cement mortar though having good strength with high shrinkage is much liable for surface cracks.

C. Lime mortar possesses poor workability and poor water retentivity and also suffers high shrinkage.

D. Masonry in lime mortar has better resistance against rain penetration and is less liable to crack when compared to masonry in cement mortar.

3499. In the case of panel wall subjected to horizontal loads at right angles to the plane of the wall, with the mortar not leaner than Ml type, tensile stress in bending in the vertical direction may be allowed to the extent of _______________?
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A. 0.4 kg/cm2

B. 1.2 kg/cm2

C. 0.7 kg/cm2

D. 1.0 kg/cm2

3500. If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of wall subjected to eccentric loading as per code is_________________?
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A. 25%

B. 50%

C. 10%

D. 33.33%

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