Vayudoot Aviation

1. Compressibility error:

is calibrated out of the ASI at MSL ISA conditions and only causes overreading when air density is decreased and TAS exceeds 300 kt.

is calibrated out of the ASI at MSL ISA conditions and only causes overreading when air density is decreased and CAS exceeds 300 kt.

causes overreading of the ASI at all levels whenever TAS exceeds 300 kt.

causes overreading of the ASI whenever CAS exceeds 300 kt.

2. Some ASIs have coloured arcs and lines marked on their dials. A yellow arc and a white arc indicate:

cautionary range and flap operating speed range.

cautionary range and normal operating range.

flap operating speed range and normal operating range.

flap operating speed range and cautionary range.

3. An aircraft maintaining a constant CAS and altitude is flying from a cold airmass into warmer air. The effect of the change of temperature on the speed will be

CAS will decrease.

TAS will decrease.

TAS will increase.

EAS will increase.

4. If the static line to the ASI becomes blocked during a climb, the ASI reading will:

progressively under indicate the value of airspeed

progressively over indicate the value of airspeed.

increase, no matter what the actual airspeed is.

stick at the airspeed showing at the moment of blockage.

5. The airspeed indicator is calibrated to:

an air density of 1013.25 gms/m3.

conditions of the International Standard Atmosphere.

indicate correctly in any atmosphere.

conditions of the International Standard Atmosphere at MSL.

6. Excluding blockages, the full list of errors of the ASI is

instrument error, position error, density error, manoeuvre induced error.

instrument error, position error, barometric error, temperature error, lag, manoeuvre induced error.

instrument error, position error, density error, compressibility error, manoeuvre induced error.

instrument error, position error, temperature error, compressibility error, manoeuvre induced error.

7. What will be the TAS if cruising altitude is 39 000 ft, temperature is ISA +5 and CAS 200 kt:

370 kt

383 kt

388 kt

364 kt

8. If the pitot line to an ASI becomes totally blocked during a climb, the ASI reading will

progressively under indicate the value of the airspeed

increase, no matter what the actual airspeed is.

decrease, no matter what the actual airspeed is.

stick at the airspeed showing at the moment of blockage.

9. Dynamic pressure is equal to:

½ ρv2

(½ ρv) 2

½ (ρv) 2

½ vρ2

10. If the static line to the ASI becomes blocked during a long descent, a dangerous situation could arise due to the ASI

overreading, this indicated speed possibly leading to the operation of flaps and/or landing gear at speeds in excess of safety speeds.

underreading, this indicated speed falsely showing the aircraft to be closer to the stalling speed than it actually is.

overreading, this indicated speed falsely showing the aircraft to be further from the stalling speed than it actually is.

underreading, this indicated speed possibly leading to the operation of flaps and/or landing gear at speeds in excess of safety speeds.

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Questions for AIR SPEED INDICATOR