Online Exams Advanced Surveying - Set 07 - ObjectiveBooks

# Practice Test: Question Set - 07

1. ‘H’ is the flying height above mean ground level and ‘f’ is the principal distance of a vertical photograph. The mean scale of the photographs is
(A) Hf
(B) H/f
(C) f/H
(D) H + f

2. 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
(A) 2 mm
(B) 4 mm
(C) 6 mm
(D) 10 mm

3. Latitude of the observer's position is equal to altitude of
(A) North pole
(B) Pole star
(C) Celestial pole
(D) All the above

4. The flying height of the camera is 1,000 m above mean ground level, the distance of the top of a building from a nadir point is 10 cm and the relief displacement of building is 7.2 mm. The height of the building, is
(A) 52 m
(B) 62 m
(C) 72 m
(D) 82 m

5. The meridian of a place is
(A) A great circle passing through the place and the poles
(B) A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
(C) A semi-circle which passes through the place and is terminated at the poles
(D) An arc of the great circle which passes through the place and is perpendicular to the equator

6. The orthogonal projection of the perspective centre on a tilted photograph, is called
(B) Isocenter
(C) Principal point
(D) Plumb point

7. When a star is between the pole and the horizon, the relationship between latitude (Î»), zenith distance (z) and declination Î´, is
(A) Î¸ = z + Î´
(B) Î¸ = Î´ - z
(C) Î¸ = 180° - (z + Î´)
(D) Î¸ = (z + Î´) - 180°

8. Pick up the correct statement from the following:
(A) Refraction correction is zero when the celestial body is in the zenith
(B) Refraction correction is 33' when the celestial body is on the horizon
(C) Refraction correction of celestial bodies depends upon their altitudes
(D) All the above

9. Pick up the incorrect statement from the following. In a spherical triangle
(A) Every angle is less than two right angles
(B) Sum of the three angles is equal to two right angles
(C) Sum of the three angles less than six right angles and greater than two right angles
(D) Sum of any two sides is greater than the third

10. In field astronomy, the quantities observed are entirely
(A) Lengths
(B) Angles
(C) Heights
(D) All of these

11. Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year
(A) Once
(B) Twice
(C) Thrice
(D) Four times

12. For mapping any country
(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

13. Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer's meridian measured from the pole, is
(A) Co-declination
(B) Co-altitude
(C) Co-latitude
(D) Polar distance

14. Longitude of a place is the angular distance between the meridian of the place and
(A) The standard meridian
(B) The International Date Line
(C) That of Greenwich
(D) Both (a) and (c) of above

15. The sun's declination remains north between
(A) March 21 to June 21
(B) June 21 to September 21
(C) September 21 to December 21
(D) Both (a) and (b) of above

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