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PSC Civil Engg: Surveying Quiz 4

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Question 1

For minor adjustments of horizontal angles measured using a theodolite, the tangential screw is adjusted after

Question 2

Which of the following minor instruments are used for setting out right angles in chain surveying?
(i) Cross staff
(ii) Optical square
(iii) Prism square
(iv) Auto level

Question 3

Consider the following characteristics of contours:
1) A uniform slope is indicated when contour lines are uniformly spaced.
2) Contour lines cannot end anywhere but can close on themselves.
3) A set of closed contours indicates a depression or a summit, according to the lower or higher values being respectively inward.
Which of the above statements are correct?

Question 4

Regarding a Prismatic Compass, which one of the following statements is correct?

Question 5

An invar tape, 50 m in length, standardized at 20˚c temperature and a pull of 10 kg is given. This used to measure a baseline. The correction per tape length, if at the time of measurement the temperature was 30˚c and the coefficient of linear expansion of the tape is found to be 1 X 10-6 per ˚c,will be:
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