Vayudoot Aviation

1. Total Air Temperature is

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

the static air temperature minus the recovery factor.

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

the recovery factor plus the ram rise.

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

25°C

50°C

16°C

5°C

3. Converted into degrees Celsius - 40°F is

-40°C

-108°C

-56.5°C

-20°C

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

platinum

beryllium copper

potassium

plutonium

5. 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.

6. The difference between static air temperature and total air temperature is known as

the recovery factor.

corrected outside air temperature.

the ram rise.

hot ramp radiation.

7. 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.

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:

increase in adiabatic cooling as airspeed increases.

increase in pressure as airspeed increases.

difference in electrical resistance of the two metals.

different coefficients of expansion of the two metals.

9. An air temperature probe may be aspirated in order to:

prevent icing.

compensate for thermal soaking at the ramp position.

measure air temperature on the ground.

reduce the effect of solar radiation.

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

change of electrical resistance of the two metals.

change of electrical capacitance with change in temperature.

change of electrical resistance with temperature.

change of electrical resistance with change in pressure.

Question Bank

Questions for AIR TEMPERATURE MEASUREMENT