Civil Engineering - Surveying

36. 

The line normal to the plumb line is known as

A. horizontal line
B. level line
C. datum line
D. vertical line.

Answer: Option B

Explanation:

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37. 

The angle of intersection of a curve is the angle between

A. back tangent and forward tangent
B. prolongation of back tangent and forward tangent
C. forward tangent and long chord
D. back tangent and long chord.

Answer: Option A

Explanation:

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38. 

Planimeter is used for measuring

A. volume
B. area
C. contour gradient
D. slope angle
E. none of these

Answer: Option B

Explanation:

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39. 

In a perfect prismatic compass

A. magnetic axis and geometric axis of the needle coincide
B. ends of the needle and pivot are in same vertical and horizontal planes
C. pivot is vertically over the centre of the graduated circle
D. needle is always kept sensitive
E. all the above.

Answer: Option E

Explanation:

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40. 

The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as

A. chromatic aberration
B. spherical aberration
C. astigmatism
D. coma.

Answer: Option A

Explanation:

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