Pick up the correct statement from the following : the apparent error on reversa

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Question
Pick up the correct statement from the following :
Options
A. the apparent error on reversal is twice the actual error
B. the correction may be made equal to half the observed discrepancy.
C. the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results
D. all the above.

Correct Answer

all the above.

Surveying problems

Search Results

1. If arithmetic sum of latitudes of a closed traverse is ?Lat and closing error in latitude is dx, the correction for a side whose latitude is l, as given by Transit Rule, is
Options
A.
B.
C.
D. none of these.

2. An imaginary line joining the points of equal elevation on the surface of the earth, represents
Options
A. contour surface
B. contour gradient
C. contour line
D. level line
E. none of these.

4. The accuracy of measurement in chain surveying, does not depend upon
Options
A. length of the offset
B. scale of the plotting
C. importance of the features
D. general layout of the chain lines.

6. In chain surveying tie lines are primarily provided
Options
A. to check the accuracy of the survey
B. to take offsets for detail survey
C. to avoid long offsets from chain lines
D. to increase the number of chain lines.

8. The real image of an object formed by the objective, must lie
Options
A. in the plane of cross hairs
B. at the centre of the telescope
C. at the optical centre of the eye-piece
D. anywhere inside the telescope.

10. If R is the radius of the main curve, ? the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is
Options
A. (R - S) tan ?/2 - L/2
B. (R + S) tan ?/2 - L/2
C. (R + S) tan ?/2 + L/2
D. (R - S) tan ?/2 + L/2
E. (R - S) cos ?/2 + L/2

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