The sensitiveness of a level tube decreases if radius of curvature of its inner

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Question
The sensitiveness of a level tube decreases if
Options
A. radius of curvature of its inner surface is increased
B. diameter of the tube is increased
C. length of the vapour bubble is increased
D. both viscosity and surface tension are increased.

Correct Answer

both viscosity and surface tension are increased.

Surveying problems

Search Results

1. Pick up the correct statement from the following :
Options
A. the tangent screw enables to give small movement under conditions of smooth and positive control
B. standing on the tripod is the levelling head or trib arch
C. the levelling screws are used to tilt the instrument so that its rotation axis is truly vertical
D. all the above.

2. For a closed traverse the omitted measurements may be calculated
Options
A. length of one side only
B. bearing of one side only
C. both length and bearing of one side
D. length or bearing of adjacent side
E. all the above.

4. Pick up the correct statement from the following:
Options
A. the theodolite in which telescope can be rotated in vertical plane is called a transmit
B. when the vertical circle is to the left of the telescope during observation, it is called to be in left face
C. when the vertical circle is to the right of the telescope during observation, it is called to be in right face
D. all the above.

5. For true difference in elevations between two points A and B, the level must be set up
Options
A. at any point between A and B
B. at the exact mid point of A and B
C. near the point A
D. near the point B.

6. The limiting length of an offset does not depend upon
Options
A. accuracy of the work
B. method of setting out perpendiculars
C. scale of plotting
D. indefinite features to be surveyed.

7. If f₁ and f₂ are the distances from the optical centre of a convex lens of focal length f to conjugate two points P₁ and P₂ respectively, the following relationship holds good
Options
A. f = f₁ + f₂
B. f = (f₁ + f₂)
C.
D. none of these.

8. True meridians are generally preferred to magnetic meridians because
Options
A. these converge to a point
B. these change due to change in time
C. these remain constant.
D. None of these.

9. Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to
Options
A. 14.14
B. 28.28 m
C. 200 m
D. none of these.

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