Q. While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is

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Q. In chain surveying field work is limited to

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Q. 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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Q. One of the tacheometric constants is additive, the other constant, is

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Q. The limiting length of an offset does not depend upon

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Q. The most reliable method of plotting a theodolite traverse, is

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Q. 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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Q. 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

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Q. The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is

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Q. For a closed traverse the omitted measurements may be calculated

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Q. The slope correction for a length of 30 m along a gradient of 1 in 20, is

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Q. The main principle of surveying is to work

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Q. For the construction of highway (or railway)

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Q. If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

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Q. The sensitiveness of a level tube decreases if

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Q. For true difference in elevations between two points A and B, the level must be set up

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Q. ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is

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Q. Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than

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Q. Pick up the correct statement from the following :

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Q. The radius of curvature of the arc of the bubble tube is generally kept

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