Discussion
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- Question
A back sight
Options- A. is always taken on a point of known elevation or can be computed
- B. is added to the known level to obtain the instrument height
- C. taken on an inverted staff is treated as negative
- D. all the above.
- Correct Answer
- all the above.
- 1. Pick up the correct statement from the following :
Options- 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. Discuss
- 2. The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known
Options- A. balancing the sights
- B. balancing the departures
- C. balancing the latitudes
- D. balancing the traverse. Discuss
- 3. In optical reading instruments
Options- A. the vertical circle is usually continuous from 0° to 359°
- B. the readings increase when the telescope is elevated in the face left position
- C. the readings decrease when the telescope is elevated in the face right position
- D. all the above. Discuss
- 4. The angle between two plane mirrors of optical square, is
Options- A. 20°
- B. 30°
- C. 45°
- D. 60°
- E. 90°. Discuss
- 5. When the bubble of the level tube of a level, remains central
Options- A. line of sight is horizontal
- B. axis of the telescope is horizontal
- C. line of collimation is horizontal
- D. geometrical axis of the telescope is horizontal. Discuss
- 6. The diaphragm of a stadia theodolite is fitted with two additional
Options- A. horizontal hairs
- B. vertical hairs
- C. horizontal and two vertical hairs
- D. none of these. Discuss
- 7. On a diagonal scale, it is possible to read up to
Options- A. one dimension
- B. two dimensions
- C. three dimensions
- D. four dimensions. Discuss
- 8. Cross hairs in surveying telescopes, are fitted
Options- 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. Discuss
- 9. Pick up the correct specification of Ramsden eyepiece from the following :
Options- A. it consists of two equal piano convex lenses
- B. the curved surfaces of plano-convex lenses face each other
- C. the two lenses are separated by a distance equal to 2/3 of the focal length of either lens.
- D. the distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam
- E. all the above. Discuss
- 10. The systematic errors which persist and have regular effects in the performance of a survey operation, are due to
Options- A. carelessness
- B. faulty instrument
- C. inattention
- D. none of these. Discuss
Surveying problems
Search Results
Correct Answer: all the above.
Correct Answer: balancing the traverse.
Correct Answer: all the above.
Correct Answer: 45°
Correct Answer: line of sight is horizontal
Correct Answer: horizontal hairs
Correct Answer: three dimensions
Correct Answer: in front of the eye piece.
Correct Answer: all the above.
Correct Answer: faulty instrument
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