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41
Error due to incorrect ranging is obtained from the relation $$R = \frac{d}{{40}}m,$$  when the chain used is length equal to . . . . . . . .
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Answer: Option A
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42
The object glass is provided in Dumpy level with a . . . . . . . .
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Answer: Option B
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43
In internal focussing telescope, the additional concave lens inside the short tube can be moved between the object lens and diaphragm by means of . . . . . . . . arrangement.
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Answer: Option B
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44
Basic principal of the instrument pantagraph is . . . . . . . .
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Answer: Option A
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45
The process of establishing intermediate points on a straight line connecting two stations . . . . . . . .
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Answer: Option B
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46
Reciprocal ranging is used when alignment is to be done across . . . . . . . .
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Answer: Option D
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47
What is SPS . . . . . . . .
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Answer: Option A
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48
The combined effect of curvature and refraction in levelling is an error which is
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Answer: Option B
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49
One of the disadvantages of steel band is it . . . . . . . .
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Answer: Option A
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50
A line joining two stations which is used to locate details, for away from the main line is called . . . . . . . .
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Answer: Option C
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