Advance Surveying Sheet 5

1) Question.

For determining the local sidereal time
Answer.
- 1
  
  the hour angle of star is added to the right ascension if star is in western horizon
- 2
  
  the hour angle of star is subtracted from the right ascension if star is in western horizon.
- 3
  
  the hour angle of star is added to the right ascension if star is in eastern horizon.
- 4
  
  none of these.
Answer: 1

Explanation:
2) Question.

Pick up the correct statement from the following :
Answer.
- 1
  
  An adjusted sidereal chronometer goes at the rate which keeps pace with the rotation of the earth in space
- 2
  
  At the moment when an observer's meridian intersects the point $γ$ (first point of Arries) his local sidereal time is $00^{n} 00^{m} 00^{s}$
- 3
  
  The observer's local sidereal time at any moment is the hour angle of $γ$ (first point of Arries) reckoned from the meridian westward upto $360 °$
- 4
  
  all the above
Answer: 4

Explanation:
3) Question.

Pick up the correct statement from the following :
Answer.
- 1
  
  astronomical meridian plane passes through a point, the zenith at the pole
- 2
  
  the meridian planes of two points cut in one line which is parallel to the earth's and axes of rotation
- 3
  
  the angle between the meridian planes of two points is the difference of astronomical longitude of the two places
- 4
  
  all the above
Answer: 4

Explanation:
4) Question.

At the instant of transit of a star
Answer.
- 1
  
  $ϕ = 90 ˚ - α + δ$
- 2
  
  $ϕ = 90 ° + α + δ$
- 3
  
  $ϕ = 90 ° - α - δ$
- 4
  
  none of these
Answer: 1

Explanation:
5) Question.

If h is the altitude of the star $ϕ$ is the observer's latitude, and $δ$ is the star's declination, the value of azimuth is given by
Answer.
- 1
  
  $\cos Z = (\sin δ - \sin ϕ . \sin h) / (\cos ϕ \cos h)$
- 2
  
  $\cos Z = (\cos δ - \sin ϕ . \sin h) / (\sin ϕ \cos h)$
- 3
  
  $\cos Z = (\tan δ - \sin ϕ . \sin h) / (\sin ϕ \cos h)$
- 4
  
  none of the above
Answer: 1

Explanation:
6) Question.

When a star transits at the zenith
Answer.
- 1
  
  the astronomical triangle becomes of the largest area
- 2
  
  the astronomical traingle reduces to an arc joining the pole and the zenith
- 3
  
  the angle of elevation of the star is $90 ˚$
- 4
  
  all the above
Answer: 4

Explanation:
7) Question.

The astronomical triangle PZS formed by the arcs joining the pole, the zenith and the star
Answer.
- 1
  
  reduces to an arc when the star transits at zenith
- 2
  
  the side PZ is of a fixed value for a particular observer
- 3
  
  the side PS is of fixed value for a particular star
- 4
  
  all the above
Answer: 4

Explanation:
8) Question.

Pick up the correct statement from the following :
Answer.
- 1
  
  The curves joining pole with zenith, zenith with star and star with pole form a spherical triangle
- 2
  
  At the zenith, the angle of the spherical triangle, made by star is azimuth
- 3
  
  At the pole, the angle of the spherical triangle made by star is hoar angle
- 4
  
  All the above
Answer: 4

Explanation:
9) Question.

The first point of Aeries
Answer.
- 1
  
  is the point in the celestial sphere where zero meridian crosses the celestial equator
- 2
  
  is usually denoted by the Greek letter $γ$
- 3
  
  is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda.
- 4
  
  all the above
Answer: 4

Explanation:
10) Question.

Sidereal day
Answer.
- 1
  
  is the period of time taken by earth in making a complete rotation with reference to stars
- 2
  
  is slightly shorter than an ordinary solar day
- 3
  
  is divided into the conventional hours, minutes and seconds
- 4
  
  all the above
Answer: 4

Explanation:

Advance Surveying Sheet 5

Question Pallet