AIR SPEED INDICATOR – Air – DGCA Question Bank For Politics

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

decrease, no matter what the actual airspeed is.

increase, no matter what the actual airspeed is.

progressively under indicate the value of the airspeed

stick at the airspeed showing at the moment of blockage.

#2. Compressibility error:

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

causes overreading of the ASI whenever CAS 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.

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

#3. 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 falsely showing the aircraft to be further from the stalling speed than it actually is.

underreading, this indicated speed falsely showing the aircraft to be closer to 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.

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

#4. 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.

EAS will increase.

TAS will increase.

TAS will decrease.

#5. The airspeed indicator is calibrated to:

conditions of the International Standard Atmosphere.

conditions of the International Standard Atmosphere at MSL.

an air density of 1013.25 gms/m3.

indicate correctly in any atmosphere.

#6. Dynamic pressure is equal to:

½ vρ2

½ ρv2

(½ ρv) 2

½ (ρv) 2

#7. Excluding blockages, the full list of errors of the ASI is:

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

instrument error, position error, temperature error, compressibility 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.

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

cautionary range and normal operating range.

flap operating speed range and normal operating range.

cautionary range and flap operating speed range.

flap operating speed range and cautionary range.

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

388 kt

383 kt

364 kt

370 kt

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