Advanced Surveying problems
- 1. The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 2. The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than
Options- A. 0.01 second
- B. 0.001 second
- C. 0.0001 second
- D. none of these. Discuss
Correct Answer: 0.0001 second
- 3. Pick up the incorrect statement from the following. High oblique photographs
Options- A. may have tilt up to 30°
- B. may include the image of the horizon
- C. may not include the image of the horizon
- D. none of these. Discuss
Correct Answer: none of these.
- 4. To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30, 000, with a camera of 30 cm focal length, the flying height is
Options- A. 4000 m
- B. 5000 m
- C. 6000 m
- D. 7000 m. Discuss
Correct Answer: 6000 m
- 5. For mapping any country
Options- A. geodetic triangulation of greatest possible sides and accuracy is carried out
- B. primary triangles are broken down into secondary triangles of somewhat lesser accuracy
- C. secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys
- D. all the above. Discuss
Correct Answer: all the above.
- 6. If the image of a triangulation station of R.L. 500 m is 4 cm from the principal point of a vertical photo taken from an altitude of 2000 m, above datum, the height displacement will be
Options- A. 2 mm
- B. 4 mm
- C. 6 mm
- D. 8 mm
- E. 10 mm. Discuss
Correct Answer: 10 mm.
- 7. The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is
Options- A. 1 : 10,000
- B. 1 : 15,000
- C. 1 : 20,000
- D. 1 : 30,000. Discuss
Correct Answer: 1 : 20,000
- 8. The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as
Options- A. photo plumb point
- B. plumb point
- C. nadir point
- D. isocentre
- E. none of these. Discuss
Correct Answer: photo plumb point
- 9. Pick up the correct statement from the following :
Options- A. Aerial photographs may be either vertical or oblique
- B. Vertical photographs are taken with the axis of camera pointing vertically downward
- C. Vertical photographs are used for most accurate maps
- D. On oblique photographs, scale variation is larger as compared to that of vertical photographs
- E. all the above. Discuss
Correct Answer: all the above.
- 10. The principal plane contains
Options- A. nadir point
- B. iso centre
- C. principal point
- D. principal axis and principal line
- E. all the above.. Discuss
Correct Answer: all the above..
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