Pick up the correct statement from the following. The difference between the lon

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Question
Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.
Options
A. by subtracting their longitudes if places are in the same hemisphere
B. by adding their longitudes if places are in the different hemispheres
C. by subtracting the sum of their longitudes exceeding 180� from 360� if places are in different hemispheres
D. all the above.

Correct Answer

by subtracting the sum of their longitudes exceeding 180� from 360� if places are in different hemispheres

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3. The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as
Options
A. satellite station
B. eccentric station
C. false station
D. pivot station.

4. For any star to be a circumpolar star, its
Options
A. declination must be 0�
B. declination must be 90�
C. distance from the pole must be less than the latitude of the observer
D. hour angle must be 180�.

5. The most convenient co-ordinate system for specifying the relative positions of heavenly bodies on the celestial sphere, is
Options
A. altitude and azimuth system
B. declination and hour angle system
C. declination and right ascension system
D. declination and altitude system
E. azimuth and declination system.

6. The height displacement on a vertical photograph
Options
A. increases as the horizontal distance increases from the principal point
B. increases as the ground elevation increases
C. decreases as the flying height increases
D. all the above.

8. Pick up the correct statement from the following :
Options
A. The angle between the plane of the negative and the horizontal plane containing perspective axis is the tilt of the photograph
B. The direction of maximum tilt is defined by the photo principal line
C. The principal plane is truly vertical plane which contains perspective centre as well as principal point and plumb point
D. All the above.

10. Systematic errors
Options
A. always follow some definite mathematical law
B. can be removed by applying corrections to the observed values
C. either make the result too great or too small
D. are also known as cumulative errors
E. all the above.

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