Vayudoot Aviation

1. The Earth rotates about it's

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

Polar diameter

Equatorial diameter

2. 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°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.]

- [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.]

3. A meridian is a

Semi great circle joining places of same longitude.

Semi great circle

Line joining places of the same latitude

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

both.

radius is the same as that of the Earth

plane passes through the center of the Earth

5. 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°]

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

Only global satellites can identify them on the earth.

can be distinctly identified when map reading.

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

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

Exactly the same

Along Equator is more

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

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

Greenwich meridian

Equator

the Pole

9. The maximum Latitude can be as much as

360°

90°

180°

10.
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.]

11. Graticule is the network of meridians and parallels on

Both

Earth

Maps

12. For measuring latitude, the datum used is

Prime meridian

the Pole.

Equator

13. The datum for measuring Longitude is called

the Equator

the Prime Latitude

the Prime Meridian

14. 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.

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

the rhumb line joining the two places.

a straight line joining the two places on a map

the shorter arc of the great circle joining the two places

16. Earth is a

Asteroid.

Planet

Satellite

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

equator

both.

meridians

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

45° north and south

0° north and south (equator)

90° north and south

19. The cardinal points are

All the above.

North, West

South, East

20. 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)?

6932 km.

6862 km.

6879 km.

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