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Surveying
Comments
Question
Cross-staff is used for
Options
A. setting out right angles
B. measuring contour gradient
C. taking levels
D. measuring distances
E. none of these
Correct Answer
setting out right angles
Surveying problems
Search Results
1. The whole circle bearing of a line is 290°. Its reduced bearing is
Options
A. N 20° E
B. N 20° W
C. N 70° W
D. S 70° E
Show Answer
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Correct Answer: N 70° W
2. The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto
Options
A. 5"
B. 10"
C. 15"
D. 20"
E. 30"
Show Answer
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Correct Answer: 20"
3. The slope correction may be ignored if
Options
A. the slope of the ground is less than 3°
B. to slope of the ground is say 1 in 19
C. both (a) and (b)
D. neither (a) nor (b)
Show Answer
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Correct Answer: both (a) and (b)
4. Removal of parallax, may be achieved by focussing
Options
A. the objective
B. the eye-piece
C. the objective and the eye-piece
D. none of these.
Show Answer
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Correct Answer: the objective and the eye-piece
5. Ramsden eye-piece consists of
Options
A. two convex lenses short distance apart
B. two concave lenses short distance apart
C. one convex lens and one concave lens short distance apart
D. two plano-convex lenses short distance apart, with the convex surfaces facing each other.
Show Answer
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Correct Answer: two plano-convex lenses short distance apart, with the convex surfaces facing each other.
6. The least count of a vernier scale is
Options
A. sum of the smallest divisions of main and vernier scales
B. value of one division of the primary scale divided by total number of divisions of vernier scale
C. value of one division of vernier scale divided by total number of divisions of primary scale
D. none of these.
Show Answer
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Correct Answer: value of one division of the primary scale divided by total number of divisions of vernier scale
7. The Random errors tend to accumulate proportionally to
Options
A. numbers of operations involved
B. reciprocal of operations involved
C. square root of the number of operation involved
D. cube root of the number of operation involved.
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Correct Answer: square root of the number of operation involved
8. A traverse deflection angle is
Options
A. less than 90°
B. more than 90° but less than 180°
C. the difference between the included angle and 180°
D. the difference between 360° and the included angle.
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Correct Answer: the difference between the included angle and 180°
9. In case of reduction of levels by the height of instrument method,
Options
A. ? B.S. - ? F.S. = difference in R.L.S of the first station and last station
B. ? (R.L. + I + F.S.) - first R.L = ? (H.I. + No. of R.L.s.)
C. both (a) and (b) above
D. neither (a) nor (b).
Show Answer
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Correct Answer: neither (a) nor (b).
10. The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at
Options
A. every point of the bubble
B. either end of the bubble
C. the mid-point of the bubble
D. no where.
Show Answer
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Correct Answer: the mid-point of the bubble
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