Civil Engineering - Surveying
Exercise :: Surveying - Section 2
41. |
Pick up the correct statement from the following : |
A. |
the power of a lens is the reciprocal of its focal length | B. |
the unit of power of the lens is diopter | C. |
the power of two or more thin lenses in contact is the power of the combination of the lenses | D. |
all the above. |
Answer: Option D
Explanation:
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42. |
The area of a plane triangle ABC, having its base AC and perpendicular height h, is |
A. |
bh | B. |
ba sin C | C. |
bc sin A | D. |
S(S - a)(S - b)(S - c) where S is  | E. |
all the above |
Answer: Option E
Explanation:
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43. |
The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known |
A. |
declination | B. |
azimuth | C. |
dip | D. |
bearing. |
Answer: Option C
Explanation:
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44. |
A relatively fixed point of known elevation above datum, is called |
A. |
bench mark | B. |
datum point | C. |
reduced level | D. |
reference point. |
Answer: Option A
Explanation:
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45. |
Cross hairs in surveying telescopes, are fitted |
A. |
in the objective glass | B. |
at the centre of the telescope | C. |
at the optical centre of the eye piece | D. |
in front of the eye piece. |
Answer: Option D
Explanation:
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