DGCA Air Navigation: Scale Questions
130 exam-style Scale questions for the DGCA Air Navigationpaper (CPL & ATPL). The first 12 are free below with answers and explanations — sign up free to practise all of them with progress tracking.
- Q1
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 approxiately?
- A1 : 3 500 000.
- B1 : 5 000 000.
- C1 : 2 000 000.
- D1 : 4 500 000.
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Correct answer: A. 1 : 3 500 000.
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- Q2
On a Lambert Conformal chart the distance between meridians 5° apart along latitude 37° North 9 cm. The scale of the chart at that parallel approxiates?
- A1 : 3 500 000. °
- B1 : 5 000 000
- C1 : 4 000 000
- D1 : 4 500 000
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Correct answer: B. 1 : 5 000 000
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- Q3
A Mercator chart has a scale at the equator = 1: 3 704 000. What is the scale at latitude 60 °S?
- A1 : 1 500 000.
- B1 : 2 000 000.
- C1 : 1 852 000.
- D1 : 1 408 000.
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Correct answer: C. 1 : 1 852 000.
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- Q4
A straight line drawn on a chart measures 4.63 cm and represents 150 NM. The chart scale is?
- A1 : 6 000 000.
- B1 : 5 000 000.
- C1 : 4 500 000.
- D1 : 6 500 000.
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Correct answer: A. 1 : 6 000 000.
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- Q5
In a navigation chart a distance of 49 NM is equal to 7 cm. The scale of the chart is approximately?
- A1 : 2 000 000.
- B1 : 2 300 000.
- C1 : 1 600 000.
- D1 : 1 300 000.
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Correct answer: D. 1 : 1 300 000.
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- Q6
On a direct Mercator projection, at latitude 45° North, a certain length represents 70 NM. At latitude 30° North, the same length represents approximately?
- A86 nm.
- B75 nm.
- C45 nm.
- D90 nm.
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Correct answer: A. 86 nm.
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- Q7
At 60° N the scale of a direct Mercator chart is 1 : 3 000 000. What is the scale at the equator?
- A1 : 5 000 000.
- B1 : 4 500 000.
- C1 : 12 000 000.
- D1 : 6 000 000.
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Correct answer: D. 1 : 6 000 000.
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- Q8
What is the chart distance between longitudes 179°E and 175°W on a direct Mercator chart with a scale 1 : 5 000 000 at the equator?
- A133 mm.
- B100 mm.
- C113 cm.
- D125 mm.
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Correct answer: A. 133 mm.
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- Q9
At 47° North the chart distance between meridians 10° apart is 5 inches. The scale of the chart at 47° North approximates?
- A1 : 600 000.
- B1 : 6 000 000.
- C1 : 12 000 000.
- D1 : 5 000 000.
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Correct answer: B. 1 : 6 000 000.
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- Q10
Approximately how many nautical miles correspond to 12 cm on a map with a scale of 1 : 2 000 000?
- A130 nm.
- B130 cm.
- C200 nm.
- D240 nm.
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Correct answer: A. 130 nm.
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- Q11
The total length of the 53°N parallel of latitude on a direct Mercator chart is 133 cm. What is the approximate scale of the chart at latitude 30°S?
- A1 : 26 000 000.
- B1 : 2 600 000.
- C1 : 125 000.
- D1 : 6 000 000.
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Correct answer: A. 1 : 26 000 000.
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- Q12
A straight line on a chart 4.89 cm long represents 185 NM. The scale of this chart is approximately?
- A1 : 6 000 000.
- B1 : 5 500 000.
- C1 : 6 500 000.
- D1 : 7 000 000.
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Correct answer: D. 1 : 7 000 000.
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