Vayudoot Aviation

1. The maximum difference between geocentric and geodetic latitude occurs at about

0° north and south (equator)

45° north and south

90° north and south

2. The shortest distance between any two points on the Earth is defined by

a straight line joining the two places on a map

the shorter arc of the great circle joining the two places

the rhumb line joining the two places.

3. Graticule is the network of meridians and parallels on

Maps

Earth

Both

4. The ratio of the ellipticity of the earth is 1/297, if the major axis is 6956 km at the equator, what is the minor axis (poles)?

6862 km.

6879 km.

6932 km.

5. For measuring latitude, the datum used is

the Pole.

Prime meridian

Equator

6. The Earth rotates about it's

Equatorial diameter

Polar diameter

Sometimes around the Polar and sometimes around the Equatorial diameter depending upon the season.

7. A great circle is any circle on the surface of the Earth whose

plane passes through the center of the Earth

both.

radius is the same as that of the Earth

8. Latitude is expressed in degrees, minutes and seconds to the North or South of

Greenwich meridian

the Pole

Equator

9. The maximum Latitude can be as much as

360°

180°

90°

10. Rhumb line is a curved line on the Earth cutting successive meridians at the same angle. It is

convex to the Equator

concave to the Equator

sometimes concave and sometimes convex to the Equator depending upon the hemisphere.

11. The distance around the Earth along the Equator and around the meridian and antemeridian is

Around the Poles (meridian and its antemeridian) is more.

Exactly the same

Along Equator is more

12. Calculate the d'long between position A 165°W and position B 103°W. Aircraft is flying from A to B

- [THE TWO POINTS ARE IN SAME HEMISPHERE SUBTRACT SMALL FROM LARGE NO. 165°-103° = 62°W. (SEE DIAGRAM BELOW) REMEMBER THAT ANTI CLOCK MOVEMENT IS EAST (090°) AND CLOCKWISE MOVEMENT IS WEST (270°). WHEN TWO POSITIONS ARE IN DIFFERENT HEMISPHERES THE SITUATION IS DIFFERENT.]

- [THE TWO POINTS ARE IN SAME HEMISPHERE SUBTRACT SMALL FROM LARGE NO. 165°-103° = 62°E. (SEE DIAGRAM BELOW) REMEMBER THAT ANTI CLOCK MOVEMENT IS EAST (090°) AND CLOCKWISE MOVEMENT IS WEST (270°). WHEN TWO POSITIONS ARE IN DIFFERENT HEMISPHERES THE SITUATION IS DIFFERENT.]

13. The datum for measuring Longitude is called

the Prime Latitude

the Prime Meridian

the Equator

14. The only line on the Earth which is both Great Circle and rhumb line is

both.

equator

meridians

15. A meridian is a

Semi great circle joining places of same longitude.

Semi great circle

Line joining places of the same latitude

16.
Calculate the d'long between A 165°W and B 170°E. Aircraft is flying from A to B.

- [SEE THE DIAGRAM BELOW. THE DIFFERENCE 165° AND 180° IS 15°. THE DIFFERENCE BETWEEN 170° AND 180° IS 10°. THE D' LONG THEREFORE IS 25°W BECAUSE THE MOVEMENT IS CLOCKWISE.]

- [SEE THE DIAGRAM BELOW. THE DIFFERENCE 165° AND 180° IS 15°. THE DIFFERENCE BETWEEN 170° AND 180° IS 10°. THE D' LONG THEREFORE IS 25°S BECAUSE THE MOVEMENT IS CLOCKWISE.]

17. The cardinal points are

North, West

South, East

All the above.

18. Earth is a

Planet

Satellite

Asteroid.

19. Point A is 20°30'N and point B 41°30'S. If an aircraft is travelling from A and B, what is the d'lat?

- [62°]

- [52°]

20. Parallels of Latitude and Meridians of longitude on the Earth

are only imaginary lines and so are not marked on the Earth.

Only global satellites can identify them on the earth.

can be distinctly identified when map reading.

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