Flying at high speed at high altitude, the difference between ram air temperature and static air temperature is:

likely to be less than when flying low and slow.

proportional to the square of the absolute temperature.

Aircraft air temperature thermometers are shielded to protect them from:

accidental physical damage on the ground or hailstones in flight.

An air temperature probe may be aspirated in order to:

measure air temperature on the ground.

compensate for thermal soaking at the ramp position.

reduce the effect of solar radiation.

Total Air Temperature is:

the maximum temperature attainable by the air when brought to rest, adiabatically.

the temperature indicated on the air temperature thermometer plus the ram rise.

the static air temperature minus the recovery factor.

the recovery factor plus the ram rise.

The difference between static air temperature and total air temperature is known as:

corrected outside air temperature.

A direct reading aircraft thermometer usually consists of a bimetallic helix protruding into the airstream. Movement of the pointer over the temperature scale will depend upon:

different coefficients of expansion of the two metals.

difference in electrical resistance of the two metals.

increase in pressure as airspeed increases.

increase in adiabatic cooling as airspeed increases.

A remote reading thermometer depends upon ....... to indicate changes in temperature:

change of electrical resistance with temperature.

change of electrical resistance of the two metals.

change of electrical resistance with change in pressure.

change of electrical capacitance with change in temperature.

DGCA Air Navigation: Air Temperature & AoA Measurement Questions

16 exam-style Air Temperature & AoA Measurement questions for the DGCA Air Navigation 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.

Q1
Converted into degrees Celsius - 40°F is:
- A -56.5°C
- B -40°C
- C -20°C
- D -108°C
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Correct answer: B. -40°C

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Q2
In an aircraft thermometer with an electrical resistance sensor to measure the air temperature, the resistance wire element is probably:
- A plutonium
- B platinum
- C potassium
- D beryllium copper
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Correct answer: B. platinum

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Q3
Flying at high speed at high altitude, the difference between ram air temperature and static air temperature is:
- A likely to be less than when flying low and slow.
- B due to adiabatic cooling.
- C due to adiabatic warming.
- D proportional to the square of the absolute temperature.
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Correct answer: C. due to adiabatic warming.

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Q4
Aircraft air temperature thermometers are shielded to protect them from:
- A solar radiation.
- B accidental physical damage on the ground or hailstones in flight.
- C airframe icing.
- D kinetic heating.
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Correct answer: A. solar radiation.

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Q5
At a true airspeed of 500 knots, a ram rise of air temperature can be expected of:
- A 50°C
- B 25°C
- C 5°C
- D 16°C
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Correct answer: B. 25°C

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Q6
An air temperature probe may be aspirated in order to:
- A prevent icing.
- B measure air temperature on the ground.
- C compensate for thermal soaking at the ramp position.
- D reduce the effect of solar radiation.
Show answer

Correct answer: B. measure air temperature on the ground.

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Q7
Total Air Temperature is:
- A the maximum temperature attainable by the air when brought to rest, adiabatically.
- B the temperature indicated on the air temperature thermometer plus the ram rise.
- C the static air temperature minus the recovery factor.
- D the recovery factor plus the ram rise.
Show answer

Correct answer: A. the maximum temperature attainable by the air when brought to rest, adiabatically.

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Q8
The difference between static air temperature and total air temperature is known as:
- A corrected outside air temperature.
- B the ram rise.
- C the recovery factor.
- D hot ramp radiation.
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Correct answer: B. the ram rise.

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Q9
A direct reading aircraft thermometer usually consists of a bimetallic helix protruding into the airstream. Movement of the pointer over the temperature scale will depend upon:
- A difference in electrical resistance of the two metals.
- B increase in pressure as airspeed increases.
- C increase in adiabatic cooling as airspeed increases.
- D different coefficients of expansion of the two metals.
Show answer

Correct answer: D. different coefficients of expansion of the two metals.

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Q10
A remote reading thermometer depends upon ....... to indicate changes in temperature:
- A change of electrical resistance of the two metals.
- B change of electrical resistance with temperature.
- C change of electrical resistance with change in pressure.
- D change of electrical capacitance with change in temperature.
Show answer

Correct answer: B. change of electrical resistance with temperature.

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Q11
What formula gives the total temperature (TT) from the static temperature (TS):
- A A
- B B
- C C
- D D
Show answer

Correct answer: B. B

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Q12
Total Air Temperature is __________ than static air temperature and the difference varies with __________
- A warmer altitude
- B colder altitude
- C warmer CAS
- D colder CAS
Show answer

Correct answer: C. warmer CAS

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Converted into degrees Celsius - 40°F is:

In an aircraft thermometer with an electrical resistance sensor to measure the air temperature, the resistance wire element is probably:

Flying at high speed at high altitude, the difference between ram air temperature and static air temperature is:

Aircraft air temperature thermometers are shielded to protect them from:

At a true airspeed of 500 knots, a ram rise of air temperature can be expected of:

An air temperature probe may be aspirated in order to:

Total Air Temperature is:

The difference between static air temperature and total air temperature is known as:

A direct reading aircraft thermometer usually consists of a bimetallic helix protruding into the airstream. Movement of the pointer over the temperature scale will depend upon:

A remote reading thermometer depends upon ....... to indicate changes in temperature:

What formula gives the total temperature (TT) from the static temperature (TS):

Total Air Temperature is __________ than static air temperature and the difference varies with __________

4 more Air Temperature & AoA Measurement questions in the full bank

Total Air Temperature is than static air temperature and the difference varies with