DGCA Performance: Atmosphere & Airfield Questions
158 exam-style Atmosphere & Airfield questions for the DGCA Performance paper (CPL · ATPL · PPL). The first 12 are free below with answers and explanations — sign up free to practise all of them with progress tracking.
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Q1
If pressure altitude is 30000 ft amsl and mach number is 0.84, what is the ISA TAT?
- A -10.
- B 10.
- C -12.
- D 12.
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Correct answer: C. -12.
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Q2
Maximum allowable clearway length is limited by?
- A 50% of TODA.
- B 50% of TORA.
- C Minimum acceptable load bearing strength.
- D 150% of Stopway.
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Correct answer: B. 50% of TORA.
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Q3
If indicated TAT is-10, pressure altitude is 30000 ft amsl, and mach number is 0.84, What is the temperature deviation?
- A 2.
- B -2.
- C 4.
- D -4.
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Correct answer: A. 2.
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Q4
Density altitude is the
- A height above the surface
- B altitude reference to the standard datum plane
- C altitude read directly from the altimeter
- D pressure altitude corrected for 'non standard' temperature
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Correct answer: D. pressure altitude corrected for 'non standard' temperature
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Q5
Maximum allowable stopway length is limited by?
- A 50% of TODA.
- B 50% of TORA.
- C Minimum acceptable load bearing strength.
- D 50% of runway.
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Correct answer: C. Minimum acceptable load bearing strength.
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Q6
The Density Altitude
- A is equal to the pressure altitude.
- B is used to calculate the FL above the Transition Altitude.
- C is used to establish minimum clearance of 2.000 feet over mountains.
- D is used to determine the aeroplane performance.
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Correct answer: D. is used to determine the aeroplane performance.
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Q7
Which of the following combinations most reduces the take-off and climb performance of an aircraft?
- A high temperature and high pressure
- B low temperature and high pressure
- C low temperature and low pressure
- D high temperature and low pressure
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Correct answer: D. high temperature and low pressure
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Q8
If pressure altitude is 40000 ft amsl, indicated TAT is -29, what is the mach number assuming ISA conditions.
- A 0.7.
- B 0.75.
- C 0.8.
- D 0.85.
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Correct answer: C. 0.8.
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Q9
Density altitude is:
- A the true altitude of the aircraft
- B the altitude in the standard atmosphere corresponding to the actual conditions
- C the indicated altitude on the altimeter
- D used to calculate en-route safety altitudes
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Correct answer: B. the altitude in the standard atmosphere corresponding to the actual conditions
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Q10
Stopway slope must be?
- A Same as the runway.
- B Not more than 125% of that of runway.
- C Less than that of runway.
- D More than that of runway.
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Correct answer: A. Same as the runway.
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Q11
If mach number is 0.88 and TAT is 4, what is the pressure altitude in the iqternational standard atmosphere?
- A 22000 ft
- B 24000 ft.
- C 26000 ft.
- D 28000 ft.
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Correct answer: D. 28000 ft.
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Q12
Stopway semi-width must be?
- A At least 150% that of the runway.
- B At least 95 m.
- C At least 60 m.
- D At least the same as the runway.
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Correct answer: D. At least the same as the runway.
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