Correct Answer:
Is minimum if the staff is held truly normal to the line of sight.
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In chain surveying field work is limited to
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Correct Answer:
Linear measurements only
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For true difference in elevations between two points A and B, the level must be set up
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Correct Answer:
At the exact mid point of A and B
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One of the tacheometric constants is additive, the other constant, is
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Correct Answer:
Multiplying constant
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Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is
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Correct Answer:
30 cm
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The radius of curvature of the arc of the bubble tube is generally kept
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Correct Answer:
100 m
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If the rate of gain of radial acceleration is 0.3 m per sec3 and full centrifugal ratio is developed. On the curve the ratio of the length of the transition curve of same radius on road and railway, is
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Correct Answer:
2.828
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An ideal vertical curve to join two gradients, is
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Correct Answer:
Parabolic
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Pick the correct statement from the following :
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Correct Answer:
All these
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Pick up the correct statement from the following:
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Correct Answer:
The eyepiece plays no part in defining the line of sight
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The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to
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Correct Answer:
Twice the distance between the zero of graduation and the foot of the staff
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In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by
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Correct Answer:
Changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
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The most reliable method of plotting a theodolite traverse, is
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Correct Answer:
By independent co-ordinates of each station
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If S is the length of a subchord and R is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to
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Correct Answer:
1718.9 S/R
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In levelling operation
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Correct Answer:
When the instrument is being shifted, the staff must not be moved and when the staff is being carried forward, the instrument must remain stationary
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The real image of an object formed by the objective, must lie
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Correct Answer:
In the plane of cross hairs
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The sensitiveness of a level tube decreases if
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Correct Answer:
Both viscosity and surface tension are increased
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The angle between two plane mirrors of optical square, is
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Correct Answer:
45°
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An imaginary line joining the points of equal elevation on the surface of the earth, represents
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Correct Answer:
Contour line
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The main principle of surveying is to work
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Correct Answer:
From whole to the part
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