civil engineering Mcqs
3451. Normal tension is that pull which_______________?
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A. neutralizes the effect due to pull and sag

B. makes the correction due to sag equal to zero

C. makes the correction due to pull equal to zero

D. is used at the time of standardising the tape

3452. The cross hairs in the surveying telescope are placed_____________?
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A. much closer to the objective lens than to the eye piece

B. much closer to the eye-piece than to the objective lens

C. midway between eye piece and objective lens

D. anywhere between eye-piece and objective lens

3453. If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated____________?
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A. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

B. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate

C. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate

D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate

3454. Benchmark is established by________________?
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A. trigonometrical levelling

B. barometric levelling

C. hypsometry

D. spirit levelling
3455. Select the correct statement_______________?
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A. A contour is not necessarily a closed curve

B. Two contours of different elevations do not cross each other except in case of an overhanging cliff

C. A contour represents a ridge line if the concave side of lower value contour lies towards the higher value contour

D. All of the above statements are correct

3456. Select the correct statement?
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A. Slope of a hill cannot be determined with the help of contours

B. Contour interval on any map is kept constant

C. Inter-visibility of points on a contour map cannot be ascertained

D. Direct method of contouring is cheaper than indirect method

3457. Contour interval is_______________?
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A. larger if the time available is more

B. larger for accurate works

C. inversely proportional to the scale of the map

D. directly proportional to the flatness of ground

3458. For a well-conditioned triangle, no angle should be less than______________?
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A. 20

B. 60

C. 30

D. 45

3459. Horizontal distances obtained by thermometric observations_________________?
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A. require slope and tension corrections

B. require slope correction

C. require tension correction

D. do not require slope and tension corrections
3460. Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations ?
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A. measuring angle and distance from one transit station

B. measuring angles to the point from at least two stations

C. measuring distance from two points on traverse line

D. measuring angle at one station and distance from other

3461. The sensitivity of a bubble tube can be increased by________________?
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A. increasing the diameter of the tube

B. increasing the viscosity of liquid

C. decreasing the length of bubble

D. decreasing the radius of curvature of tube

3462. The resection by two point problem as compared to three point problem_______________?
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A. requires more labour

B. takes less time

C. gives more accurate problem

D. none of the above

3463. Which of the following is not the function of levelling head ?
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A. to support the main part of the instrument

B. none of the above

C. to provide a means for leveling the theodolite

D. to attach the theodolite to the tripod

3464. The allowable length of an offset depends upon the______________?
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A. degree of accuracy required

B. scale of plotting

C. all of the above

D. method of setting out the perpendiculars and nature of ground

3465. In the cross-section method of indirect contouring, the spacing of cross-sections depends upon_____________?
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A. characteristics of ground

B. correct answer is ?

C. scale of plan

D. contour interval

3466. Different grades are joined together by a ________________?
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A. compound curve

B. reverse curve

C. vertical curve

D. transition curve

3467. A telescope is said to be inverted if its______________?
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A. vertical circle is to its left and the bubble of the telescope is up

B. vertical circle is to its right and the bubble of the telescope is down

C. vertical circle is to its right and the bubble of the telescope is up

D. vertical circle is to its left and the bubble of the telescope is down

3468. What is the correct sequence of the following events in rock tunnelling?
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A. es ?

B. setting up and drilling

C. removing foul gas

D. ect the correct answer using the codes given below

E. checking misfire

F. loading explosives and blasting

3469. Drift method of tunnelling is used to construct tunnels in__________________?
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A. soft grounds

B. self supporting grounds

C. broken grounds

D. rock
3470. Circular section of tunnels is not suitable for________________?
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A. tunnels driven by shield method

B. non-cohesive soils

C. placement of concrete lining

D. carrying water

3471. Which of the following are percussion drills ?
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A. ) churn drill </strong>

B. i) wagon drill

C. ect correct answer?

D. ) diamond drill

E. shot drill
3472. Assertion A : English method of tunneling requires more time as compared to other methods of tunneling. Reason R : In English method of tunneling, the masons and excavators have to work alternately/
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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 and R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

3473. Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
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A. It is suitable for construction in unstable rocks

B. In case of excessive water, it is easy to take correct steps

C. In this method, it is easy to install timber support

D. Tunnelling can be continuous and the work can be expedited
3474. Which of the following is not a component of the shield ?
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A. hood

B. liner plate

C. propelling jacks

D. tail

3475. Which of the following methods of tunneling is used for long tunnels at great depths ?
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A. Needle beam method

B. Austrian method

C. English method

D. Army method

3476. A good blast with a good yield is obtained if the cut hole is___________________?
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A. inclined at 45 to the face

B. inclined at 30 to the face

C. inclined at 15 to the face

D. normal to face

3477. Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?
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A. 4 m

B. 2 m

C. 5 m

D. 3 m
3478. In the construction of Metro Railways, Cut and Cover method of construction is suitable in situations listed at________________?
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A. sider the following situations

3479. Which one of the following is a component of a shield for tunnelling ?
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A. stiffener

B. trench jack

C. cutting edge

D. liner plate

3480. If D is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_________________?
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A. 104 D

B. 124 D

C. 82 D

D. 42 D

3481. If N is the number of shafts used, then the total number of feces available for attacking the excavation and construction in tunnels are_________________________?
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A. N + 2

B. 2N

C. 2 N + 1

D. 2 N + 2
3482. 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</strong>

D. i) is suitable for concrete lining

E. is suitable for soils in which roof can stand for few minutes without support
3483. The most suitable soil for compressed air tunneling is________________?
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A. silt

B. gravel

C. clay

D. sand

3484. 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
3485. 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
3486. 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

3487. 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

3488. American method of tunneling________________?
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A. ect the correct answer?

B. ) requires heavy timbers </strong>

C. is no, suitable for railway or highway tunnels

D. is suitable for large sized tunnels
3489. 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

3490. 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

3491. 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

3492. 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

3493. 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</strong>

C. timbering

D. pumping

3494. 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

3495. 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. </strong>

D. Lintel band is provided at lintel level on partition walls,
3496. 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

3497. A high lime content in a composite cement-lime mortar results in______________?
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A. sider the following statements.

B. weaker mortar.</strong>

C. ect the correct statements.

D. slow hardening.

E. quick setting.

3498. Water retentivity for brick masonry should not be less than__________________?
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A. 80%

B. 60%

C. 70%

D. 50%

3499. 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.</strong>

3500. 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