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- Question
The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as
Options- A. line of sight
- B. line of collimation
- C. axis of the telescope
- D. none of these.
- Correct Answer
- line of collimation
- 1. Pick up the correct statement from the following :
Options- A. spherical aberration may be reduced by diminishing the aperture
- B. spherical aberration may be minimised by replacing the single lens by a combination of the lenses.
- C. in telescope objectives, a combination of convex lens and concave lens is used.
- D. in eyepieces, two plano-convex lenses placed at a certain distance apart are used
- E. all the above. Discuss
- 2. Pick up the correct statement from the following :
Options- A. a refracting telescope consists optically of two lenses
- B. the principal axes of both the lenses coincide the optical axis of the telescope
- C. the lens nearer the object to be viewed is convex and is called objective
- D. the lens nearer the eye is called eyepiece
- E. all the above. Discuss
- 3. Pick up the correct statement from the following :
Options- A. the framework which consists of a series of connected lines, the lengths and directions of which are found from measurements, is called a traverse.
- B. the system of a series of lines which forms a circuit which ends at the starting point, is called a closed traverse
- C. the traverse that starts from a point already fixed in some survey system and ends on another such point, is called a controlled traverse
- D. the traverse that is not controlled is called a fly traverse
- E. all the above. Discuss
- 4. If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum perpendicular offset for the transition curve, is
Options- A. 0.70 m
- B. 1.70 m
- C. 2.70 m
- D. 3.70 m
- E. 4.70 m Discuss
- 5. Probable accidental error in precise levelling as recommended by International Geodetic Association, should not exceed
(where k is in kilometers.)
Options- A. ± 0.1 k mm
- B. ± 0.5 k mm
- C. ± 1 k mm
- D. ± 2 k mm
- E. ± 5 k mm. Discuss
- 6. The curvature of the earth's surface, is taken into account only if the extent of survey is more than
Options- A. 100 sq km
- B. 160 sq km
- C. 200 sq km
- D. 260 sq km. Discuss
- 7. Pick up the correct statement from the following :
Options- A. to locate a gross error in bearing that may exist in controlled theodolite traverse, we may plot the traverse from each end. The traverse station having the same coordinates by each route is the one where the error lies
- B. to locate a gross error in bearing, in a controlled traverse, we plot the traverse and the station through which perpendicular to sector of the closing line passes is the station at which the error was made
- C. to locate a gross error due to taping in a controlled traverse, we plot the traverse to a convenient scale. The bearing of the closing error will be approximately the same as that of the leg in which the gross error consists
- D. all the above. Discuss
- 8. Diaphragm of a surveying telescope is held inside
Options- A. eye-piece
- B. objective
- C. telescope tube at its mid point
- D. telescope at the end nearer the eye-piece
- E. telescope at its end nearer the objective. Discuss
- 9. Whole circle bearing of a line is preferred to a quadrantal bearing merely because
Options- A. bearing is not completely specified by an angle
- B. bearing is completely specified by an angle
- C. Sign of the correction of magnetic declination is different in different quadrants
- D. its trigonometrical values may be extracted from ordinary tables easily. Discuss
- 10. An internal focussing type surveying telescope, may be focussed by the movement of
Options- A. objective glass of the telescope
- B. convex-lens in the telescope
- C. concave lens in the telescope
- D. plano-convex lens in the telescope. Discuss
Surveying problems
Search Results
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: 2.70 m
Correct Answer: ± 1 k mm
Correct Answer: 260 sq km.
Correct Answer: all the above.
Correct Answer: telescope at the end nearer the eye-piece
Correct Answer: bearing is completely specified by an angle
Correct Answer: concave lens in the telescope
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