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