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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