DGCA Air Navigation: Air Temperature & AoA Measurement Questions
16 exam-style Air Temperature & AoA Measurement 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
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:
- Aplutonium
- Bplatinum
- Cpotassium
- Dberyllium 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:
- Alikely to be less than when flying low and slow.
- Bdue to adiabatic cooling.
- Cdue to adiabatic warming.
- Dproportional 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:
- Asolar radiation.
- Baccidental physical damage on the ground or hailstones in flight.
- Cairframe icing.
- Dkinetic 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:
- A50°C
- B25°C
- C5°C
- D16°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:
- Aprevent icing.
- Bmeasure air temperature on the ground.
- Ccompensate for thermal soaking at the ramp position.
- Dreduce the effect of solar radiation.
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Correct answer: B. measure air temperature on the ground.
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- Q7
Total Air Temperature is:
- Athe maximum temperature attainable by the air when brought to rest, adiabatically.
- Bthe temperature indicated on the air temperature thermometer plus the ram rise.
- Cthe static air temperature minus the recovery factor.
- Dthe recovery factor plus the ram rise.
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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:
- Acorrected outside air temperature.
- Bthe ram rise.
- Cthe recovery factor.
- Dhot 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:
- Adifference in electrical resistance of the two metals.
- Bincrease in pressure as airspeed increases.
- Cincrease in adiabatic cooling as airspeed increases.
- Ddifferent coefficients of expansion of the two metals.
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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:
- Achange of electrical resistance of the two metals.
- Bchange of electrical resistance with temperature.
- Cchange of electrical resistance with change in pressure.
- Dchange of electrical capacitance with change in temperature.
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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):
- AA
- BB
- CC
- DD
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Correct answer: B. B
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- Q12
Total Air Temperature is __________ than static air temperature and the difference varies with __________
- Awarmer altitude
- Bcolder altitude
- Cwarmer CAS
- Dcolder CAS
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Correct answer: C. warmer CAS
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