Vayudoot Aviation

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

Transverse Mercator.

Stereographic.

Direct Mercator.

2. Charts are used only for

Dead reckoning navigation

Pola navigation.

Flying over seas

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

Departure angle.

Secant of 1/2 latitude.

Map convergence.

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

Lamberts

Mercators

IMPP

5. 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° = 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° = 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° = 5/ 1,666,006]

6. 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.

7. 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

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

Latitude of departure

Mid way longitude

Latitude of arrival

9. Radio Navigation charts (Jeppesen) uses:

IMPP

Lamberts conformal conic projection

Mercator's projection

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

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

Expands directly with the secant of the latitude.

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

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

Dead reckoning navigation

Instrument flying

Contact navigation

12. On a Direct Mercator, rhumb lines are?

Straight lines.

Curves convex to the nearest pole.

Curves concave to the nearest pole.

13. 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]

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

2.0.

1.0.

1.5.

15. 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.

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

Reduces between and expands outside the standard parallels.

Increases between and reduces outside of the standard parallels.

Is constant between the standard parallels.

17. On a Direct Mercator chart, meridians are?

Converging curved lines.

Parallel, equally spaced, vertical straight lines.

Parallel, equally spaced, horizontal straight lines.

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

Most accurate at the standard parallels.

The same as the scale.

The same as earth convergency at the parallel of origin.

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

Great circle.

Rhumb lines.

Complex curves.

20. 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]

21. 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.

22. Graticule is the network of meridians and parallels on

Maps

Earth

Both

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

Stereographical projection.

Transverse Mercator.

Lamber's Conformal.

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

75 nm.

86 nm.

45 nm.

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

Both

Mercators

Lamberts

26. 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 = 3/8.77.520]

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

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

At the prime meridian.

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

Along the great circle of tangency.

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

Lambert's Conical

Polar Stereographic.

Direct Mercator.

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

Correct only along the standard parallels.

Correct only along the parallel of origin.

Correct only at the poles.

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

Curves concave to the nearest pole.

Straight lines.

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

31. 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.

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

Spot heights and Layer tinting

All the above.

Contours and form lines.

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

Places of equal elevation

Equal variation.

Equal pressure

34. On the Mercator's chart

Distortion increases away from the Equator.

Distortion increases away from the Pole

Parallels of latitude are not straight lines.

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

Curves concave to the parallel of origin.

Straight lines within the standard parallels.

Curves concave to the pole of projection.

36. On Jeppesen charts scale is given in following manner

All of the above

Graduated scale and statement in words

Representative fraction.

37. 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 ]

38. 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]

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

Curves concave to the pole.

Straight lines.

Approximately straight lines.

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

A rhumb line.

A meridian of longitude.

A parallel of latitude.

41. 1000 meters equals

0.545 km

0.545 nm

1 nm

42. 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 : 12 000 000.

1 : 5 000 000.

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

Standard Parallels, latitude of origin.

Latitude of origin, standard Parallels

Latitude of origin, latitude of origin

44. 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.

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

Lambert's Conformal.

Polar stereographical projection.

Direct Mercator.

46. 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.

47. 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.

48. 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 : 2 000 000.

1 : 3 500 000.

49. In an ortho morphic projection

Meridians and parallels are straight lines

Both the above

Meridians and parallels intersect at right angles

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

Standard latitudes.

Meridian of tangency.

Prime meridian.

Question Bank

Questions for PROJECTIONS