civil engineering MCQs – Page 172

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 Review each marked answer and report any item that may be outdated or unclear.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

3421. Which of the following errors can be neutralised by setting the level midway between the two stations ?
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A. error due to curvature only

B. error due to refraction only

C. error due to both curvature and re-fraction

D. none of the above

3422. Agate cap is fitted with a_________________?
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A. level

B. prismatic compass

C. chain

D. cross staff

3423. If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to_______________?
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A. d

B. 1/d

C. 1/d2

D. d2

3424. If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is_________________?
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A. 100.655m

B. 99.345 m

C. 100.345 m

D. 101.870m

3425. Alevel lineis a______________?
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A. horizontal line

B. line passing through the center of cross hairs and the center of eye piece

C. line passing through the objective lens and the eye-piece of a dumpy or tilting level

D. line parallel to the mean spheriodal surface of earth

3426. The angle of intersection of the two plane mirrors of an optical square is______________?
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A. 45

B. 90

C. 60

D. 30

3427. The following sights are taken on a turning point________________?
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A. foresight and intermediate sight

B. backsight only

C. foresight and backsight

D. foresight only

3428. Which of the following is not used in measuring perpendicular offsets ?
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A. optical square

B. line ranger

C. steel tape

D. cross staff

3429. Detailed plotting is generally done by________________?
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A. resection

B. traversing

C. radiation

D. all of the above

3430. The type of surveying which requires least office work is________________?
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A. plane table surveying

B. theodolite surveying

C. trigonometrical levelling

D. tacheomefry

3431. In the double application of principle of reversion, the apparent error is_______________?
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A. equal to true error

B. half the true error

C. four times the true error

D. two times the true error

3432. The horizontal angle between the true meridian and magnetic meridian at a place is called______________?
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A. declination

B. magnetic bearing

C. local attraction

D. azimuth

3433. The number of horizontal cross wires in a stadia diaphragm is ________________?
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A. one

B. three

C. four

D. two

3434. For which of the following permanent adjustments of theodolite, the spire test is used ?
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A. adjustment of horizontal axis

B. adjustment of plate levels

C. adjustment of altitude bubble and vertical index frame

D. adjustment of line of sight

3435. If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is________________?
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A. 7.5 m

B. 50

C. 75 m

D. 25 m

3436. Overturning of vehicles on a curve can be avoided by using ________________?
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A. reverse curve

B. compound curve

C. vertical curve

D. transition curve

3437. Closed contours, with higher value inwards, represent a_______________?
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A. none of the above

B. depression

C. plain surface

D. hillock

3438. The rise and fall method of levelling provides a complete check on_______________?
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A. intermediate sight

B. foresight

C. backsight

D. all of the above

3439. Cross staff is an instrument used for________________?
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A. none of the above

B. measuring approximate horizontal angles

C. measuring bearings of the lines

D. setting out right angles

3440. A series of closely spaced contour lines represents a___________________?
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A. steep slope

B. gentle slope

C. plane surface

D. uniform slope

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