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Civil Engineering - Surveying

Exercise : Surveying - Section 6
21.
The slope correction for a 3° slope for a length of 100 m, is
-0.11 m
-0.12 m
-1.87 m
-0.137 m
Answer: Option
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

22.
In horizontal angles, the error due to imperfect levelling of the plate bubble is
large when sights are nearly level
large for long sights
less for steeply inclined sights
large for steeply inclined sights.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Pick up the correct statement from the following :
to locate a gross error in bearing that may exist in controlled theodolite traverse, we may plot the traverse from each end. The traverse station having the same coordinates by each route is the one where the error lies
to locate a gross error in bearing, in a controlled traverse, we plot the traverse and the station through which perpendicular to sector of the closing line passes is the station at which the error was made
to locate a gross error due to taping in a controlled traverse, we plot the traverse to a convenient scale. The bearing of the closing error will be approximately the same as that of the leg in which the gross error consists
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Pick up the correct statement from the following :
The horizontal angle between magnetic meridian and true meridian at a place is called magnetic declination or variance of the compass
the imaginary lines which pass through points at which the magnetic declinations are equal at a given time are called isogonic lines
the isogonic lines through places at which the declination is zero are termed agonic lines
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The distances AC and BC are measured from two fixed points A and B whose distance AB is known. The point C is plotted by intersection. This method is generally adopted in
chain surveying
traverse method of surveys
triangulation
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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