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Civil Engineering - Surveying

Exercise : Surveying - Section 6
31.
An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called
contour line
contour gradient
level line
line of gentle scope.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
An angles of 45° with a chain line may be set out with
optical square
open cross staff
Fench cross staff
prismatic square.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Pick up the correct statement from the following :
spherical aberration may be reduced by diminishing the aperture
spherical aberration may be minimised by replacing the single lens by a combination of the lenses.
in telescope objectives, a combination of convex lens and concave lens is used.
in eyepieces, two plano-convex lenses placed at a certain distance apart are used
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as
line of sight
line of collimation
axis of the telescope
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39. The correct staff reading from this set up at S should be
1.435
1.345
1.425
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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