Discussion
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- Question
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.
- Correct Answer
- all the above.
- 1. 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
- 2. 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
- 3. 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
- 4. 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. Discuss
- 5. 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
- 6. 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
- 7. A dumpy level is set up with its eye-piece vertically over a peg A. The height from the top of peg A to the centre of the eye-piece is 1.540 m and the reading on peg B is 0.705 m. The level is then setup over B. The height of the eye-piece above peg B is 1.490 m and a reading on A is 2.195 m. The difference in level between A and B is
Options- A. 2.900 m
- B. 3.030 m
- C. 0.770 m
- D. 0.785 m
- E. 1.770 m. Discuss
- 8. The area of a plane triangle ABC, having its base AC and perpendicular height h, is
Options- A.
bh - B. ba sin C
- C. bc sin A
- D. S(S - a)(S - b)(S - c)
where S is
- E. all the above Discuss
- 9. A relatively fixed point of known elevation above datum, is called
Options- A. bench mark
- B. datum point
- C. reduced level
- D. reference point. Discuss
- 10. Geodetic surveying is undertaken
Options- A. for production of accurate maps of wide areas
- B. for developing the science of geodesy
- C. making use of most accurate instruments and methods of observation
- D. for determination of accurate positions on the earth's surface of system of control points
- E. all the above. Discuss
Surveying problems
Search Results
Correct Answer: in front of the eye piece.
Correct Answer: three dimensions
Correct Answer: horizontal hairs
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: faulty instrument
Correct Answer: 0.770 m
Correct Answer: all the above
Correct Answer: bench mark
Correct Answer: all the above.
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