Technical General question bank

The Atmosphere: DGCA Technical General questions

5 sample questions from Standard Book, with the correct answer shown.

Sample questions

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Question 1

Mach number is:

Question 2

When considering air, which combination of statements is true? 1 Air has mass. 2 Air is not compressible. 3 Air is able to flow or change its shape under even small pressures. 4 The viscosity of air is very high. 5 Moving air has kinetic energy.

Question 3

When considering static pressure, which statements are correct? 1 In aviation, static pressure can be measured in hectopascals. 2 The SI unit for static pressure is N/m2. 3 Static pressure is the product of the mass of air pressing down on the air beneath. 4 Called static pressure because of the air's stationary or static presence. 5 The lower the altitude, the greater the static pressure.

Question 4

When considering the ICAO ISA, which statements are correct? 1 Temperature lapse rate is 2°C per 1000 ft up to 11,000 ft. 2 Sea level temperature is assumed to be 15°C. 3 Sea level static pressure is assumed to be 1.225 kg/m3. 4 Sea level density is assumed to be 1013.25 hPa.

Question 5

Air density is:

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