Vayudoot Aviation

1. Map Distance + 10". Earth Distance = 120 nm. Find scale

- [SCALE = 1/F = MAP DISTANCE/EARTH DISTANCE = 10"/120NM = 10'/120×6.080×12 = 10/8,755.200 = 1/8.77.520]

- [SCALE = 1/F = MAP DISTANCE/EARTH DISTANCE = 10"/120NM = 10'/120×6.080×12 = 10/8,755.200 = 3/8.77.520]

2. On the Mercator's chart

Parallels of latitude are not straight lines.

Distortion increases away from the Equator.

Distortion increases away from the Pole

3. Maps indicate the details of the topography. Pilots can use this for

Dead reckoning navigation

Contact navigation

Instrument flying

4. Charts are used only for

Flying over seas

Pola navigation.

Dead reckoning navigation

5. The scale is correct on a transverse Mercator chart?

Along the great circle of tangency.

Along the datum meridian and meridians at 90° to it.

At the prime meridian.

6. Radio Navigation charts (Jeppesen) uses:

Lamberts conformal conic projection

IMPP

Mercator's projection

7. On a Lambert conformal conic projection, with two standard parallels the scale is?

Correct only at the poles.

Correct only along the parallel of origin.

Correct only along the standard parallels.

8. Where is the convergency correct on a Transverse Mercator chart?

Only at the Equator and poles.

Only at the datum meridian.

At the datum meridian and the Equator.

9. Parallels of latitude, except the equator, are?

Great circle.

Rhumb lines.

Complex curves.

10. On a Transverse Mercator chart, scale is exactly correct along the?

Prime meridian.

Standard latitudes.

Meridian of tangency.

11. On a map scale of 1: 2×106. How many km are represented by a line 4.2

- [SCALE = MD/ED = 1/2×106 = 4.2"/X2 X = 4.2"×2×106 = 8.4X106 X = 8.4×2.54×106/1×106 = 216.36 KM]

- [SCALE = MD/ED = 1/2×106 = 4.2"/X2 X = 4.2"×2×106 = 8.4X106 X = 8.4×2.54×106/1×106 = 213.36 KM]

12. On a Lambert Conformal conic chart great circle that are not meridians are?

Curves concave to the pole of projection.

Straight lines within the standard parallels.

Curves concave to the parallel of origin.

13. Graticule is the network of meridians and parallels on

Maps

Earth

Both

14. The scale of a chart is shown as 1 : 1 million. This means that

1 c.m. on the chart represents 1 million centimeters on the Earth

1" on the chart equals 1 million inches on the Earth

Both.

15. On a Lambert conformal conic chart, the distance between parallels of latitude spaced the same number of degrees apart?

Is constant between the standard parallels.

Reduces between and expands outside the standard parallels.

Increases between and reduces outside of the standard parallels.

16. The scale on a Lambert's conformal conic chart?

Is constant along a meridian of longitude.

Is constant along a parallel of latitude.

Is constant.

17. The angular difference, on a Lambert conformal conic chart, between the arrival and departure track is equal to?

Departure angle.

Map convergence.

Secant of 1/2 latitude.

18. What is the value of the convergence factor on a polar stereographic chart?

1.5.

1.0.

2.0.

19. Which of the following statements best describes how scale varies on a Mercator chart?

Expands directly with the secant of the latitude.

Expands as the secant (1/2 x co-latitude).

It is correct on the standard parallels, but expands outside them, and contracts within them.

20. On a Direct Mercator, rhumb lines are?

Curves concave to the nearest pole.

Straight lines.

Curves convex to the nearest pole.

21. In an ortho morphic projection

Both the above

Meridians and parallels intersect at right angles

Meridians and parallels are straight lines

22. The scale on a Lamberts projection is correct only along

The end parallels' of latitude and 2degs. on either side of the central meridian.

The equator

The standard paraliels

23. While measuring track at Lambert conical projection protractor is to be placed at

Latitude of departure

Mid way longitude

Latitude of arrival

24. A perfectly straight line on a Lamberts chart is?

A parallel of latitude.

A meridian of longitude.

A rhumb line.

25. Representation of high ground on a projection can be in the form of

Contours and form lines.

Spot heights and Layer tinting

All the above.

26. On a direct Mercator projection, the distance measured between two meridians spaced 5° apart at latitude 60°N is 8 cm. The Scale of this chart at latitude 60°N is approximately?

1 : 5 000 000.

1 : 3 500 000.

1 : 2 000 000.

27. At 60°N the scale of a direct Mercator chart is 1 : 3000 000. What is the scale at the equator?

1 : 5 000 000.

1 : 12 000 000.

1 : 6 000 000.

28. Which one of the following describes the appearance of rhumb lines, except meridians, on a polar stereographic chart

Straight lines.

Curves concave to the pole.

Approximately straight lines.

29. On a Lambert conformal conic chart the convergence of the meridians is?

The same as earth convergency at the parallel of origin.

Most accurate at the standard parallels.

The same as the scale.

30. On a map scale of 1:1×106. How many inches are represented by ground Distance of 400 km

- [SCALE = MD/ED = 1/1×106 = MD/400×3,280×12 MD = 15.74 INCHES ]

- [SCALE = MD/ED = 1/1×106 = MD/400×3,280×12 MD = 10.74 INCHES ]

31. Contours are lines drawn on a map or chart joining

Equal variation.

Equal pressure

Places of equal elevation

32. On a Direct Mercator chart, meridians are?

Converging curved lines.

Parallel, equally spaced, horizontal straight lines.

Parallel, equally spaced, vertical straight lines.

33. On a map cm represent earth Distance of 200 statute mile. Find scale of map

- [SCALE = MD/ED = 3CM/200NM = 3CM/200×5,280×12×2.54CM = 2/10,728,960]

- [SCALE = MD/ED = 3CM/200NM = 3CM/200×5,280×12×2.54CM = 1/10,728,960]

34. Nautical mile is more than a statute mile. Statute mile is more than a kilometer

Both statements are correct.

Only kilometer is more than a nautical mile.

Only statute mile is more than a nautical mile.

35. On a Lambert Conformal chart the distance between meridians 5' apart along latitude 37° North is 9 cm. The scale of the chart at that parallel approximates?

1 : 3 500 000.

1 : 5 000 000.

1 : 4 000 000.

36. The norminal scale of a Lambert conformal conic chart is the?

Scale at the poles.

Scale at the standard parallels.

Scale at the parallel of origin.

37. On a mercator chart scale at 57°N=1

- [(A) 1/106 = SCALE AT EQUATOR / COST57° SCALE AT EQUATOR = 0.544/106 = 1/1,838,235 (B) SCALE AT 35° = 1/1,838,235 × 1/COS35 = 1/1,505,794 (C) SCALE AT 25°N = 1/1,838,235 × 1/COS25° = 5/ 1,666,006]

- [(A) 1/106 = SCALE AT EQUATOR / COST57° SCALE AT EQUATOR = 0.544/106 = 1/1,838,235 (B) SCALE AT 35° = 1/1,838,235 × 1/COS35 = 1/1,505,794 (C) SCALE AT 25°N = 1/1,838,235 × 1/COS25° = 1/ 1,666,006]

- [(A) 1/106 = SCALE AT EQUATOR / COST57° SCALE AT EQUATOR = 0.544/106 = 1/1,838,235 (B) SCALE AT 35° = 1/1,838,235 × 1/COS35 = 1/1,505,794 (C) SCALE AT 25°N = 1/1,838,235 × 1/COS25° = 9/ 1,666,006]

38. Which one of the following statements is correct concerning the appearance of great circles, with the exception of meridians, on a polar stereographic chart whose tangency is at the pole?

The lower the latitude the closer they approximate to straight line.

Never approximate to straight lines.

The higher the latitude the closer they approximate to a straight line.

39. On Jeppesen charts scale is given in following manner

Representative fraction.

All of the above

Graduated scale and statement in words

40. On lamberts conical projection, the given scale is correct at _______ and convergence is correct at _________.

Standard Parallels, latitude of origin.

Latitude of origin, latitude of origin

Latitude of origin, standard Parallels

41. 1000 meters equals

0.545 km

1 nm

0.545 nm

42. On a direct Mercator projection, at latitude 45° North, a certain length represents 70 NM. At latitude 30° North, the same length represents approximately?

45 nm.

75 nm.

86 nm.

43. Map Distance = 13.2". Ans. ED = 350 nm. Find scale

- [SCALE = MD/ED = 13.2"/350NM = 13.2"/350×6.080×12 = 1 F =(25536000)÷13.2 = 1934545 SCALE = 1/1,934,545]

- [SCALE = MD/ED = 13.2"/350NM = 13.2"/350×6.080×12 = 1 F =(25536000)÷13.2 = 1934545 SCALE = 4/1,934,545]

44. What type of projection is generally used for charts used for navigation in North and south polar areas?

Polar stereographical projection.

Lambert's Conformal.

Direct Mercator.

45. On which of the following chart projections is it not possible to represent the north or south poles?

Polar Stereographic.

Lambert's Conical

Direct Mercator.

46. In which of the following projections will a plane surface touch the reduced earth at one of the poles?

Direct Mercator.

Transverse Mercator.

Stereographic.

47. A rhumb line is a straight line. The applies to

Mercators

IMPP

Lamberts

48. Meridians and parallel intersects at right angles. This applies to

Both

Mercators

Lamberts

49. Which one of the following, concerning great circles on Direct Mercator chart, is correct?

With the exception of meridians and the equator, they are curves concave to the equator.

Curves concave to the nearest pole.

Straight lines.

50. The chart that is generally used for navigation in polar areas is based on a?

Transverse Mercator.

Stereographical projection.

Lamber's Conformal.

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