Surveying and Levelling

331. The suitable contour interval for a map with scale 1 : 10000 is

  1. 2 m
  2. 5 m
  3. 10 m
  4. 20 m

Correct answer: (A)
2 m

332. The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every

  1. 100 sq. km of area
  2. 150 sq. km of area
  3. 200 sq. km of area
  4. None of these

Correct answer: (C)
200 sq. km of area

333. The surface of zero elevation around the earth, which is slightly irregular and curved, is known as

  1. Mean sea level
  2. Geoid surface
  3. Level surface
  4. Horizontal surface

Correct answer: (B)
Geoid surface

334. The systematic errors which persist and have regular effects in the performance of a survey operation are due to

  1. Carelessness
  2. Faulty instrument
  3. Inattention
  4. None of these

Correct answer: (B)
Faulty instrument

335. The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at

  1. Every point of the bubble
  2. Either end of the bubble
  3. The mid-point of the bubble
  4. No where

Correct answer: (C)
The mid-point of the bubble

336. The theodolites used for making tacheometric observations by optical wedge system, are

  1. Provided with stadia hairs in front of eye piece
  2. Not provided with stadia hairs at all
  3. Fitted with a glass wedge inside the telescope
  4. Fitted with a glass wedge in front of telescope

Correct answer: (D)
Fitted with a glass wedge in front of telescope

337. The total change in level along the line is equal to total back sights

  1. Minus total fore sights
  2. The total rises minus total falls
  3. The reduced level of last point minus reduced level of the first point
  4. All the above

Correct answer: (D)
All the above

338. The true meridian of a place is the line in which earth's surface is intersected by a plane through

  1. East and west points
  2. Zenith and nadir points
  3. North and south geographical poles
  4. North and south magnetic poles

Correct answer: (C)
North and south geographical poles

339. The two point problem and three point problem are methods of

  1. Resection
  2. Orientation
  3. Traversing
  4. Resection and orientation

Correct answer: (D)
Resection and orientation

340. The type of surveying which requires least office work is

  1. Tachometry
  2. Trigonometrical levelling
  3. Plane table surveying
  4. Theodolite surveying

Correct answer: (C)
Plane table surveying

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