Practice Test: Question Set - 04
1. Pick up the correct statement from the following:
- (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) All the above
2. Pick up the correct statement from the following:
- (A) Ursa Minor's remains always north of pole star
- (B) Polar star remains always north of Polaris
- (C) Polaris remains always north of Ursa Minor's
- (D) Ursa Minor's pole star and Polaris are the names of the same star
3. The following points form a pair of homologous points:
- (A) Photo principal point and ground principal point
- (B) Photo isocenter and ground isocenter
- (C) Photo plumb point and ground plumb point
- (D) All the above
4. Pick up the correct statement from the following:
- (A) The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
- (B) The difference between the absolute parallax of two points depends upon the difference in their elevations
- (C) The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
- (D) All the above
5. Pick up the incorrect statement from the following:
- (A) Latitudes north of the equator are taken as positive
- (B) Latitudes south of the equator are taken as negative
- (C) Longitudes east of Greenwich are taken as negative
- (D) Longitudes west of Greenwich are taken as positive
6. Pick up the correct statement from the following:
- (A) The sun's right ascension increases for 0 h to 24 h when it returns to the First point of Aries
- (B) The maximum declination of the sun increases up to 23½° N on about 21st June
- (C) The minimum declination of the sun is zero' on 22nd September
- (D) All the above
7. The main object of the astronomer to obtain
- (A) Astronomical latitude
- (B) Astronomical longitude
- (C) Astronomical bearing
- (D) All of these
8. Pick up the correct statement from the following:
- (A) If the applied tension to the tape is more than the standard, the tension correction is positive
- (B) If the applied tension to the tape is less than the standard, the tension correction is negative
- (C) If the temperature during measurement is greater than the standard temperature, the temperature correction is positive
- (D) All the above
9. Pick up the correct statement from the following:
- (A) Sidereal time at any instant is equal to the hour angle of the first point of Aries
- (B) Local sidereal time of any place is equal to the right ascension of its meridian
- (C) Sidereal time is equal to the right ascension of a star at its upper transit
- (D) All the above
10. The latitude of a place was obtained by subtracting the zenith distance of a star from its declination, the observed star was between
- (A) Horizon and equator
- (B) Equator and zenith
- (C) Zenith and pole
- (D) Pole and horizon
11. The stereo plotting instruments are generally manufactured on the principle of
- (A) Optical projection
- (B) Optical mechanism projection
- (C) Mechanical projection
- (D) All the above
12. The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The latitude of the place, is
- (A) 80°
- (B) 70°
- (C) 60°
- (D) 40°
13. If the general ground level of any area is 10% of the flying height, the principal points may be used as the centers of radial directions for small scale mapping even in tilted photograph up to
- (A) 1°
- (B) 2°
- (C) 3°
- (D) 4°
14. The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called
- (A) Rational horizon
- (B) True horizon
- (C) Celestial horizon
- (D) All the above
15. The equation which is obtained by multiplying each equation by the coefficient of its unknowns and by adding the equations thus formed, is known as
- (A) Observation equation
- (B) Conditional equation
- (C) Normal equation
- (D) None of these