# Aircraft Maintenance Questions and Answers – Instrument Shop – Air Speed Indicator-2

This set of Aircraft Maintenance Quiz focuses on “Instrument Shop – Air Speed Indicator-2”.

1. TAS increases as altitude increases.
a) True
b) False

Explanation: True, TAS refers to True Airspeed, which increases as altitude increases, as air density decreases. Similarly, TAS decreases as altitude decreases.

2. Which of the following is not a unit of measurement for airspeed?
a) Kilometers per hour
b) Knots
c) Miles per hour
d) Pascal

Explanation: Pascal is not a unit of measurement for airspeed. However, kilometers per hour, knots and miles per hour, are all used to indicate airspeed. The airspeed might be displayed in two units as well.

3. What is the full form of CAS?
a) Constant airspeed
b) Continuous airspeed
c) Calibrated airspeed
d) Comparative airspeed

Explanation: CAS refers to Calibrated airspeed. This airspeed is corrected for installation and instrument errors. Further, an airspeed calibration chart is available for any remaining errors.

4. Static pressure is measured from the __________
a) Static port
b) Static scale
c) Pitot scale
d) Pitot tube

Explanation: Static pressure is measured from the static port. The pitot-static system is a system of pressure-sensitive instruments.

5. What will the ASI pointer read, if both the Pitot tube and the static system are blocked?
a) Zero
b) Positive Infinite
d) Negative Infinite

Explanation: If both the Pitot tube and the static system are blocked, the ASI pointer will read zero on its scale. However, if the static ports are blocked but the Pitot tube remains open, the ASI will continue to operate, but will give inaccurate readings.

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6. If the pitot opening is blocked, but the drain hole is open, it will cause the system pressure to drop to __________
a) Critical pressure
b) Low pressure
c) Ambient pressure
d) Atmospheric pressure

Explanation: If the pitot opening is blocked, but the drain hole is open, it will cause the system pressure to drop to ambient pressure. Ambient pressure on an object refers to the pressure of the surrounding medium.

7. Which of the following determines when an aircraft will stall?
a) Angle of pitch
b) Angle of incidence
c) Angle of bank
d) Angle of attack

Explanation: The angle of attack determines when an aircraft will stall. An aircraft can stall at any speed, so monitoring the airspeed alone will not prevent a stall.

8. The Lift Reserve Indicator provides a measure of the amount of __________ being generated, by an aircraft.
a) Lift
b) Thrust
c) True speed
d) Mach speed

Explanation: The Lift Reserve Indicator provides a measure of the amount of lift being generated, by an aircraft. The instrument uses a pressure differential system and provides the pilot a visual representation of reserve lifts available.

9. An angle of attack indicator provides stall situational awareness.
a) True
b) False

Explanation: True, the angle of attack indicator provides stall situational awareness. It acts as a means for monitoring the onset of the critical angle of attack.

10. Which of the following is used only to determine airspeed?
a) Static pressure
b) Pitot pressure
c) Cockpit pressure
d) Cabin pressure

Explanation: The pitot pressure is used only to determine airspeed. However, the static pressure is used in various other measurements.

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