Vayudoot Aviation

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

Complex curves.

Great circle.

Rhumb lines.

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

Correct only along the standard parallels.

Correct only at the poles.

Correct only along the parallel of origin.

3. 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 = 4/1,934,545]

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

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

Increases between and reduces outside of the standard parallels.

Is constant between the standard parallels.

Reduces between and expands outside the standard parallels.

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

Lamber's Conformal.

Transverse Mercator.

Stereographical projection.

6. 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]

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

Lamberts

Mercators

IMPP

8. 1000 meters equals

0.545 km

1 nm

0.545 nm

9. 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 : 4 000 000.

1 : 5 000 000.

1 : 3 500 000.

10. 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.

11. 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.

86 nm.

75 nm.

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

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

At the prime meridian.

Along the great circle of tangency.

13. On a Direct Mercator chart, meridians are?

Parallel, equally spaced, horizontal straight lines.

Converging curved lines.

Parallel, equally spaced, vertical straight lines.

14. 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 : 2 000 000.

1 : 3 500 000.

1 : 5 000 000.

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

Lambert's Conical

Direct Mercator.

Polar Stereographic.

16. 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 ]

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

Straight lines.

Curves concave to the nearest pole.

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

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

Mercators

Both

Lamberts

19. 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]

20. In an ortho morphic projection

Meridians and parallels intersect at right angles

Both the above

Meridians and parallels are straight lines

21. 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° = 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]

- [(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]

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

Direct Mercator.

Transverse Mercator.

Stereographic.

23. 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.

24. On a Direct Mercator, rhumb lines are?

Curves convex to the nearest pole.

Straight lines.

Curves concave to the nearest pole.

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

Lambert's Conformal.

Direct Mercator.

Polar stereographical projection.

26. On the Mercator's chart

Parallels of latitude are not straight lines.

Distortion increases away from the Equator.

Distortion increases away from the Pole

27. 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 = 213.36 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 = 216.36 KM]

28. 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.

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

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

Both.

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

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

Only kilometer is more than a nautical mile.

Both statements are correct.

Only statute mile is more than a nautical mile.

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

Straight lines within the standard parallels.

Curves concave to the pole of projection.

Curves concave to the parallel of origin.

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

Expands directly with the secant of the latitude.

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

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

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

Instrument flying

Dead reckoning navigation

Contact navigation

34. Radio Navigation charts (Jeppesen) uses:

Mercator's projection

IMPP

Lamberts conformal conic projection

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

Secant of 1/2 latitude.

Departure angle.

Map convergence.

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

Is constant along a parallel of latitude.

Is constant.

Is constant along a meridian of longitude.

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

All the above.

Contours and form lines.

Spot heights and Layer tinting

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

The same as earth convergency at the parallel of origin.

The same as the scale.

Most accurate at the standard parallels.

39. Charts are used only for

Flying over seas

Pola navigation.

Dead reckoning navigation

40. Graticule is the network of meridians and parallels on

Earth

Maps

Both

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

Standard latitudes.

Meridian of tangency.

Prime meridian.

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

Mid way longitude

Latitude of arrival

Latitude of departure

43. On Jeppesen charts scale is given in following manner

Graduated scale and statement in words

All of the above

Representative fraction.

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

A parallel of latitude.

A rhumb line.

A meridian of longitude.

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

Scale at the standard parallels.

Scale at the parallel of origin.

Scale at the poles.

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

Equal pressure

Equal variation.

Places of equal elevation

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

1 : 6 000 000.

1 : 5 000 000.

1 : 12 000 000.

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

The standard paraliels

The equator

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

49. 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

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

1.5.

2.0.

1.0.

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