Vayudoot Aviation

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

16°C

50°C

25°C

5°C

2. 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.

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

due to adiabatic cooling.

likely to be less than when flying low and slow.

proportional to the square of the absolute temperature.

due to adiabatic warming.

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

platinum

potassium

beryllium copper

plutonium

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

measure air temperature on the ground.

reduce the effect of solar radiation.

prevent icing.

compensate for thermal soaking at the ramp position.

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

hot ramp radiation.

the recovery factor.

corrected outside air temperature.

the ram rise.

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. Converted into degrees Celsius - 40°F is

-40°C

-108°C

-56.5°C

-20°C

9. 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.

10. 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 pressure as airspeed increases.

increase in adiabatic cooling as airspeed increases.

different coefficients of expansion of the two metals.

difference in electrical resistance of the two metals.

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Questions for AIR TEMPERATURE MEASUREMENT