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- Question
In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is
Options- A. 5.24 cm
- B. 6.24 cm
- C. 7.24 cm
- D. 8.24 cm
- Correct Answer
- 7.24 cm
- 1. If + 0.8% grade meets - 0.7% grade and the rate of change of grade for 30 m distance is 0.05, the length of the vertical curve will be
Options- A. 600 m
- B. 700 m
- C. 800 m
- D. 900 m
- E. 1000 m Discuss
- 2. Pick up the incorrect statement from the following :
Options- A. while measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length
- B. an increase in temperature causes a tape to increase in length and the measured distance is too large
- C. the straight distance between end points of a suspended tape is reduced by an amount called the sag correction
- D. a 100 m tape of cross section 10 mm x 0.25 mm stretches about 10 mm under 5 kg pull. Discuss
- 3. It is more difficult to obtain good results while measuringhorizontal distance by stepping
Options- A. up-hill
- B. down-hill
- C. in low undulations
- D. in plane areas. Discuss
- 4. The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is
Options- A. 28.8 secs
- B. 41.25 secs
- C. 14.52 secs
- D. 25.05
- E. none of these Discuss
- 5. Straight, parallel and widely spaced contours represent
Options- A. a steep surface
- B. a flat surface
- C. an inclined plane surface
- D. curved surface. Discuss
- 6. If D is the degree of the curve of radius R, the exact length of its specified chord, is
Options- A. radius of the curve x sine of half the degree
- B. diameter of the curve x sine of half the degree
- C. diameter of the curve x cosine of half the degree
- D. diameter of the curve x tangent of half the degree. Discuss
- 7. The 10 mm markings on a levelling staff placed at 20 m are separated by
Options- A.
radian - B.
radian - C.
radian - D.
radian.
Discuss
- 8. Tilt of the staff in stadia tacheometry increases the intercept if it is
Options- A. away from the telescope pointing down hill
- B. towards the telescope pointing up-hill
- C. away from the telescope pointing up-hill
- D. none of these. Discuss
- 9. A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic
Options- A. spherical aberration
- B. chromatic aberration
- C. coma
- D. astigmatism. Discuss
- 10. If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is sloping
Options- A. it is possible to set offsets correctly on east side
- B. it is possible to set offsets correctly on east side
- C. it is not possible to set offsets correctly on west side
- D. it is possible to set offsets correctly on both sides. Discuss
Surveying problems
Search Results
Correct Answer: 900 m
Correct Answer: an increase in temperature causes a tape to increase in length and the measured distance is too large
Correct Answer: up-hill
Correct Answer: 41.25 secs
Correct Answer: an inclined plane surface
Correct Answer: diameter of the curve x sine of half the degree
Correct Answer:
radian Correct Answer: away from the telescope pointing up-hill
Correct Answer: spherical aberration
Correct Answer: it is possible to set offsets correctly on both sides.
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