Contours of different elevations may cross each other only in the case of an ove

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Question
Contours of different elevations may cross each other only in the case of
Options
A. an over hanging cliff
B. a vertical cliff
C. a saddle
D. an inclined plane.

Correct Answer

an over hanging cliff

Surveying problems

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1. A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads
Options
A. azimuth of the forward line
B. bearing of the. forward line
C. back bearing of the forward line
D. equal to 360�-azimuth of the forward line.

3. The lens equation is applicable
Options
A. when the thickness of the lens is small
B. only to conjugate distances along the principal axis
C. the computed quantities are accurate enough for geometrical optics of simple distances
D. all the above.

5. While working on a plane table, the correct rule is :
Options
A. Draw continuous lines from all instrument stations
B. Draw short rays sufficient to contain the points sought
C. Intersection should be obtained by actually drawing second rays
D. Take maximum number of sights as possible from each station to distant objects.

6. Determining the difference in elevation between two points on the surface of the earth, is known as
Options
A. levelling
B. simple levelling
C. differential levelling
D. longitudinal levelling.

7. In case of a direct vernier scale
Options
A. graduations increase in opposite direction in which graduations of the main scale increase
B. smallest division is longer than smallest division of the main scale
C. graduations increase in the same direction in which graduations of the main scale increase
D. none of these.

10. In case of a double line river, contours are
Options
A. stopped at the banks of the river
B. stopped at the edge of the river
C. drawn across the water
D. drawn by parabolic curves having their vertex at the centre of the water.

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