GEN 01: Earth – LMS | INSIGHT AVIATION

Results

Q1. Consider the following statements on the properties of a great circle:

All 3 answers are correct.

The great circle will maintain their initial true direction

The great circle running through two positions on the surface of the earth, is the shortest distance between these two positions

The parallels of latitudes are all great circles

The great circle running through two positions on the surface of the earth, is the shortest distance between these two positions –

Q2. The distance between the parallels of latitude 17°23’S and 23°59’N is

636 NM

2473 NM

4122 NM

2482 NM

2482 NM –

Q3. The poles on the surface of the earth may be defined as

The points at which the vertical lines runs through the centre of the earth.

The points on the surface of the earth where all meridians intersect at right angles

The points from where the distance to the equator is equal

The points where the earth's axis of rotation cuts the surface of the earth

The points where the earth’s axis of rotation cuts the surface of the earth –

Q4. ** Any Meridian Line is a: *

Rhumb Line

Rhumb Line and a semi Great Circle

Semi Great Circle

Rhumb Line and a semi Great Circle –

Q5. The compression factor of the Earth:

Is about 1:300

All answers are correct

Is so small that it may be ignored when making ordinary maps and charts

Makes the difference between the polar diameter and the equatorial diameter about 22 NM

All answers are correct –

Q6. Consider the following statements on the shape of the earth

The longest diameter is between the poles

It is slightly flattened at the poles

The diameters of the earth is the same at all latitudes

The diameter at the equator is about 60 NM longer than the diameter between the poles.

It is slightly flattened at the poles –

Q7. What is the change of longitude between A(45°00’N 163°14’E) and B(31°33’N and 157°02’E

6°12'E

13°27'W

320°16' E

6°12'W

6°12’W –

Q8. Given: The coordinates of the heliport at Issy les Moulineaux are: N48°50′ E002°16.5′ The coordinates of the antipodes are:

S41°10' E177°43.5'

S48°50' E177°43.5'

S41°10' W177°43.5'

S48°50' W177°43.5'

S48°50′ W177°43.5′ –

Q9. At what approximate latitude is the length of one minute of arc along a meridian equal to one NM (1852 m) correct?

30°

0°

45°

90°

45° – At approximately 45° latitude, one minute of arc along a meridian is very close to being exactly one nautical mile, which is 1852 meters.

Q10. Consider the following statements on meridians: *

On the southern hemisphere the meridians run towards the south pole.

The distance, in nautical miles, between two selected meridians will be constant

The relative direction between two selected meridians will be constant

All meridians run in true direction from South to North

All meridians run in true direction from South to North –

Q11. A semi great circle on the Earth which is running from the North Pole to the South Pole is a:

Difference of longitude

Parallel of latitude

Meridian

Longitude

Meridian –

Q12. A Graticule is the name given to: *

A series of Latitude and Longitude lines drawn on a chart or map

A selection of small circles as you get nearer to either pole

A series of lines drawn on a chart

A series of Latitude and Longitude lines drawn on a chart or map –

Q13. The maximum difference between geocentric and geodetic latitude occurs at about:

60° North and South

90° North and South

0° North and South (equator)

45° North and South

45° North and South –

Q14. Which definition of the equator is correct?

The equator is a small circle with its plane perpendicular to the Earth's rotational axis

The equator is a small circle, the plane is parallel to the Earth's rotational axis

The equator is a great circle with its plane parallel to the Earth's rotational axis

The equator is a great circle with its plane perpendicular to the Earth's rotational axis

The equator is a great circle with its plane perpendicular to the Earth’s rotational axis –

Q15. The term “Ellipsoid” may be used to describe

A great circle on the celestial sphere

The shape of the ecliptic

The shape of the earth

The movement of the earth around the sun

The shape of the earth –

Q16. The inclination of the earth’s axis of rotation with the plane of the ecliptic.

Is causing the variation of length of the daylight during a year

Is stable throughout the year

Is causing the seasons, summer and winter

All 3 answers are correct

All 3 answers are correct –

Q17. The highest value of longitude is found *

At Greenwich anti meridian

Close to the poles

Close to the prime meridian

Along equator

At Greenwich anti meridian –

Q18. #What is the approximate compression of the Earth? *

0.03%

0.30%

1/3000

0.3% –

Q19. The equator is located

On the surface of the earth and at right angles to the axis of rotation

On the surface of the earth, being a circle whose plane is perpendicular to the axis of the earth and cutting through the centre of the earth.

On the surface parallel to the magnetic equator

on the surface as a small circle, horizontal to the axis of rotation

On the surface of the earth, being a circle whose plane is perpendicular to the axis of the earth and cutting through the centre of the earth. –

Q20. A great circle has its North vertex at 70N 130E. What is the position of its South vertex?

70S 050W

70S 130W

70N 50W

70N 130W

70S 050W –

Q21. Consider the following statements on meridians: *

The meridians are not of equal length

The meridians are parallel only at equator

Any two halves great circle will form a meridians

Any two meridians will form a great circle

The meridians are parallel only at equator –

Q22. Position A is at latitude 33°45’N and position B is at latitude 14°25’N. What is the change in latitude between A and B?

19°20'

76°15'

48°10'

23°45'

19°20′ –

Q23. * Given that the compression value of the Earth is 1/297 and that the semi-major axis of the Earth, measured at the axis of the Equator is 6378.4 km.What is the semi-major axis of the Earth measured at the axis of the Poles?

6367.0 km

6356.9 km

6378.4 km

6399.9 km

6356.9 km –

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