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Question Bank
Questions for PROJECTIONS
Answer the following questions
Test Mode
Training Mode
1. 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.
2. 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.
3. The scale on a Lambert's conformal conic chart?
Is constant along a meridian of longitude.
Is constant.
Is constant along a parallel of latitude.
4. 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.
5. Charts are used only for
Flying over seas
Pola navigation.
Dead reckoning navigation
6. 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 = 10.74 INCHES ]
- [SCALE = MD/ED = 1/1×106 = MD/400×3,280×12 MD = 15.74 INCHES ]
7. 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]
8. 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.
9. 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.
45 nm.
86 nm.
10. 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.
Reduces between and expands outside the standard parallels.
Is constant between the standard parallels.
11. 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]
12. Maps indicate the details of the topography. Pilots can use this for
Contact navigation
Dead reckoning navigation
Instrument flying
13. 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]
14. 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.
15. On a Lambert conformal conic chart the convergence of the meridians is?
The same as the scale.
Most accurate at the standard parallels.
The same as earth convergency at the parallel of origin.
16. 1000 meters equals
0.545 km
1 nm
0.545 nm
17. The scale is correct on a transverse Mercator chart?
Along the datum meridian and meridians at 90° to it.
Along the great circle of tangency.
At the prime meridian.
18. 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° = 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]
19. 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.
20. On lamberts conical projection, the given scale is correct at _______ and convergence is correct at _________.
Latitude of origin, standard Parallels
Latitude of origin, latitude of origin
Standard Parallels, latitude of origin.
21. On a Transverse Mercator chart, scale is exactly correct along the?
Meridian of tangency.
Standard latitudes.
Prime meridian.
22. Graticule is the network of meridians and parallels on
Maps
Earth
Both
23. Parallels of latitude, except the equator, are?
Complex curves.
Rhumb lines.
Great circle.
24. A rhumb line is a straight line. The applies to
Lamberts
Mercators
IMPP
25. 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]
26. 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
27. A perfectly straight line on a Lamberts chart is?
A rhumb line.
A meridian of longitude.
A parallel of latitude.
28. In an ortho morphic projection
Both the above
Meridians and parallels intersect at right angles
Meridians and parallels are straight lines
29. On Jeppesen charts scale is given in following manner
Representative fraction.
All of the above
Graduated scale and statement in words
30. 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).
31. 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
1 c.m. on the chart represents 1 million centimeters on the Earth
Both.
32. 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.
The higher the latitude the closer they approximate to a straight line.
Never approximate to straight lines.
33. Radio Navigation charts (Jeppesen) uses:
IMPP
Mercator's projection
Lamberts conformal conic projection
34. The norminal scale of a Lambert conformal conic chart is the?
Scale at the parallel of origin.
Scale at the poles.
Scale at the standard parallels.
35. 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.
36. On a Direct Mercator chart, meridians are?
Parallel, equally spaced, horizontal straight lines.
Parallel, equally spaced, vertical straight lines.
Converging curved lines.
37. On the Mercator's chart
Distortion increases away from the Equator.
Parallels of latitude are not straight lines.
Distortion increases away from the Pole
38. Nautical mile is more than a statute mile. Statute mile is more than a kilometer
Only kilometer is more than a nautical mile.
Only statute mile is more than a nautical mile.
Both statements are correct.
39. Meridians and parallel intersects at right angles. This applies to
Lamberts
Mercators
Both
40. The chart that is generally used for navigation in polar areas is based on a?
Stereographical projection.
Lamber's Conformal.
Transverse Mercator.
41. 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.
42. On a Direct Mercator, rhumb lines are?
Curves concave to the nearest pole.
Curves convex to the nearest pole.
Straight lines.
43. What is the value of the convergence factor on a polar stereographic chart?
1.0.
2.0.
1.5.
44. While measuring track at Lambert conical projection protractor is to be placed at
Mid way longitude
Latitude of arrival
Latitude of departure
45. Contours are lines drawn on a map or chart joining
Equal variation.
Places of equal elevation
Equal pressure
46. Where is the convergency correct on a Transverse Mercator chart?
At the datum meridian and the Equator.
Only at the datum meridian.
Only at the Equator and poles.
47. 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 : 4 000 000.
1 : 5 000 000.
48. 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.
49. On which of the following chart projections is it not possible to represent the north or south poles?
Direct Mercator.
Polar Stereographic.
Lambert's Conical
50. In which of the following projections will a plane surface touch the reduced earth at one of the poles?
Transverse Mercator.
Direct Mercator.
Stereographic.
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