Questions and answers for exam Preparation

MCQs

Total Questions : 112 | Page 8 of 12 pages

Question 71. In order to find the difference in elevation between two points P and Q, a level was set upon the line PQ, 30 m from P and 1280 m from Q. The reading obtained on staff kept at P and Q were respectively 0.545 m and 3.920 m. Find the true difference in elevation between P and Q?

3.226 m
3.343 m
3.265 m
3.345 m

Discuss Question

Answer: Option C. -> 3.265 m
Answer: (c).3.265 m

Question 72. Find combined correction for curvature and refraction for 1.29 km?

0.112 m
0.128 m
0.212m
0.221 m

Discuss Question

Answer: Option A. -> 0.112 m
Answer: (a).0.112 m

Question 73. A light house is visible just above the horizon at a certain station at the sea level. The distance between the station and light house is 10 km. Find the height of the light house?

0 6728 m
0.06728 m
67.280 m
6.728 m

Discuss Question

Answer: Option D. -> 6.728 m
Answer: (d).6.728 m

Question 74. When an instrument is at P the staff readings on P is 1.824 and on Q is 2.748. When the instrument at Q the staff readings on P is 0.928 and Q is 1.606. Distance between P and Q is 1010 mts. R.L. of P is 126.386. Find true R.L. of Q?

125.555
125.565
25.575
25.585

Discuss Question

Answer: Option D. -> 25.585
Answer: (d).25.585

Question 75. Which of the following error cannot be eliminated in reciprocal levelling?

error in instrument adjustment
combined effect of earth’s curvature and refraction of atmosphere
variations in average refraction
variation in temperature

Discuss Question

Answer: Option D. -> variation in temperature
Answer: (d).variation in temperature

Question 76. Which of the following type of levelling is necessary across a river ravine or any obstacle requiring a long site between two points?

Barometric levelling
Trigonometric levelling
Reciprocal levelling
Spirit levelling

Discuss Question

Answer: Option C. -> Reciprocal levelling
Answer: (c).Reciprocal levelling

Question 77. Which of the following type of levelling is used when two points so situated that no place for the level can be found from which the lens of foresight and backsight will be even approximately equal?

Barometric levelling
Trigonometric levelling
Reciprocal levelling
Spirit levelling

Discuss Question

Answer: Option C. -> Reciprocal levelling
Answer: (c).Reciprocal levelling

Question 78. When an instrument is at P the staff readings on P is 2.748 and on Q is 1.824 when instrument at Q the staff readings on P is 1.606 and Q is 0.928. Distance between P and Q is 1010 mts. R.L. of P is 126.386. Find the angular error in collimation adjustment of the instrument?