Surveying and Levelling

341. The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known

  1. Declination
  2. Azimuth
  3. Dip
  4. Bearing

Correct answer: (C)
Dip

342. The whole circle bearing of a line is 290°. Its reduced bearing is

  1. N 20° E
  2. N 20° W
  3. N 70° W
  4. S 70° E

Correct answer: (C)
N 70° W

343. The zero of the graduated circle of a prismatic compass is located at

  1. North end
  2. East end
  3. South end
  4. West end

Correct answer: (C)
South end

344. There are two stations A and B. Which of the following statements is correct?

  1. The fore bearing of AB is AB
  2. The back bearing of AB is BA
  3. The fore and back bearings of AB differ by 180°
  4. All the above

Correct answer: (D)
All the above

345. Three point problem can be solved by

  1. Tracing paper method
  2. Bessel's method
  3. Lehman's method
  4. all of the above

Correct answer: (D)
all of the above

346. Tilt of the staff in stadia tacheometry increases the intercept if it is

  1. Away from the telescope pointing down hill
  2. Towards the telescope pointing up-hill
  3. Away from the telescope pointing up-hill
  4. None of these

Correct answer: (C)
Away from the telescope pointing up-hill

347. To avoid large centering error with very short legs, observations are generally made

  1. To chain pins
  2. By using optical system for centering the theodolite
  3. To a target fixed on theodolite tripod on which theodolite may be fitted easily
  4. All the above

Correct answer: (C)
To a target fixed on theodolite tripod on which theodolite may be fitted easily

348. To orient a plane table at a point 'p' roughly south of the mid-point of two inaccessible conical hill stations 'A' and 'B' in the plains, a point 'C' is selected in line with AB and table is oriented at 'C' by bringing ab in line with AB. A ray is then drawn towards 'P' and at 'P' the table is oriented by back ray method. The orientation so obtained, is

  1. Unique and correct
  2. Incorrect
  3. Manifold and correct
  4. Not reliable

Correct answer: (C)
Manifold and correct

349. To orient a plane table at a point with two inaccessible points, the method generally adopted, is

  1. Intersection
  2. Resection
  3. Radiation
  4. Two point problem

Correct answer: (D)
Two point problem

350. To set out a parallel from a given inaccessible point to a given line AB, the following observations are made: istance AB and angle PAM = a and angle PBA = b are measured where M is a point on the ine BA produced. The perpendicular to the desired parallel line from A and B are:

  1. AB/(cot b - cot a)
  2. AB/(cos b - cos a)
  3. AB/(cot a - cot b)
  4. AB/(cot a - cos b)

Correct answer: (A)
AB/(cot b - cot a)

Previous
Page 35 of 39
Next
Copyright © EngineeringMCQ.com