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CPL Test Series
Question Bank
Questions for AIR TEMPERATURE MEASUREMENT
Answer the following questions
Test Mode
Training Mode
1. Aircraft air temperature thermometers are shielded to protect them from:
kinetic heating.
solar radiation.
accidental physical damage on the ground or hailstones in flight.
airframe icing.
2. The difference between static air temperature and total air temperature is known as
corrected outside air temperature.
the ram rise.
hot ramp radiation.
the recovery factor.
3. Total Air Temperature is
the temperature indicated on the air temperature thermometer plus the ram rise.
the recovery factor plus the ram rise.
the static air temperature minus the recovery factor.
the maximum temperature attainable by the air when brought to rest, adiabatically.
4. 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.
5. 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.
prevent icing.
6. Flying at high speed at high altitude, the difference between ram air temperature and static air temperature is:
due to adiabatic warming.
proportional to the square of the absolute temperature.
due to adiabatic cooling.
likely to be less than when flying low and slow.
7. Converted into degrees Celsius - 40°F is
-20°C
-108°C
-56.5°C
-40°C
8. In an aircraft thermometer with an electrical resistance sensor to measure the air temperature, the resistance wire element is probably
plutonium
beryllium copper
potassium
platinum
9. At a true airspeed of 500 knots, a ram rise of air temperature can be expected of:
25°C
16°C
50°C
5°C
10. A remote reading thermometer depends upon ....... to indicate changes in temperature:
change of electrical resistance of the two metals.
change of electrical resistance with change in pressure.
change of electrical resistance with temperature.
change of electrical capacitance with change in temperature.
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