The slope correction for a 3Â° slope for a length of 100 m, is

Civil Engineering : Surveying - Quiz(MCQ)

-0.11 m

-0.12 m

-1.87 m

-0.137 m

Correct Answer : -0.137 m

Explanation : Slope correction = -L(1-cos α). Where L Slope Distance, α Slope angle

(Slope correction is always negative).

= -100(1-cos 3°)

= -0.137

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A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is_______.

202.75 m

206.75 m

208.75 m

211.75 m

Correct Answer : Option (B) : 206.75 m

In a closed traverse, sum of south latitudes exceeds the sum of north latitudes and the sum of east departures exceeds the sum of west departures, then, the closing line will lie in

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north-west quadrant

south-west quadrant

south-east quadrant

Correct Answer : Option (B) : north-west quadrant

The Huygen's telescope eye piece________.

achromatic

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Both (A) and (B)

Neither (A) nor (B)

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