250+ TOP MCQs on Instrument Shop – Air Speed Indicator-1 and Answers

Aircraft Maintenance Multiple Choice Questions on “Instrument Shop – Air Speed Indicator-1”.

1. W the static port mounted?
a) On the fuselage of an aircraft
b) On the nose of an aircraft
c) On the engine of an aircraft
d) On the tail of an aircraft
Answer: a
Clarification: The static port is mounted on the fuselage of an aircraft. The port is located at such a position where it can access the air flow in a relatively undisturbed area.

2. W the alternative static port located?
a) Inside the wings of the aircraft
b) Inside the rudder of the aircraft
c) Inside the engine of the aircraft
d) Inside the cabin of the aircraft
Answer: d
Clarification: An alternative static port is located inside the cabin of the aircraft. The alternate port acts as a backup, in case the external static port(s) are blocked.

3. Which of the following is not determined using the pitot-static system?
a) Altitude
b) Mach Number
c) Thrust
d) Airspeed
Answer: c
Clarification: Thrust is not determined using the pitot-static system. However, the other three parameters altitude, Mach number and airspeed are determined using the pitot-static system.

4. The Pitot tube is most commonly located on the wing assembly of an aircraft.
a) True
b) False
Answer: a
Clarification: True, the Pitot tube is most commonly located on the wing assembly of an aircraft. The tube is placed in such a way that its opening is exposed to the relative wind so that maximum air contact takes place.

5. What is the difference between the pitot pressure and the static pressure called?
a) Atmospheric Pressure
b) Dynamic Pressure
c) Air Pressure
d) Cabin Pressure
Answer: b
Clarification: The difference between the pitot pressure and the static pressure is called dynamic pressure. The greater the dynamic pressure, the higher is the airspeed.

6. The two additional radial markings on the airspeed indicator, one red and one blue, are associated with potential __________
a) Engine Failure
b) Landing Gear Failure
c) Radar Failure
d) Altimeter Failure
Answer: a
Clarification: The two additional radial markings on the airspeed indicator, one red and one blue, are associated with potential engine failure. The radial red line indicates V_mc and the radial blue line indicates V_YSE.

7. Which of the following refers to the speed for best rate of climb with the critical engine inoperative?
a) V_FE
b) V_NE
c) V_mc
d) V_YSE
Answer: d
Clarification: V_YSE refers to the speed for best rate of climb with the critical engine inoperative. It is indicated on the airspeed indicator in multi-engine aircraft that include radial markings on the ASI.

8. When the aircraft is moving forward, air entering the Pitot tube is at a __________ pressure than the static line.
a) Equal
b) Lower
c) Greater
d) Infinite
Answer: c
Clarification: At an instant where the aircraft is moving forward, the air entering the aircraft’s Pitot tube will be at a greater pressure than the static line. This phenomenon in turn causes the diaphragm to flex thus moving the pointer.

9. Ram air enters the system through the __________
a) Pitot tube
b) Static tube
c) Engines
d) APU Exhaust
Answer: a
Clarification: Ram air enters the system through the Pitot tube. The tube may be blocked, because of dirt or failure to remove the pitot cover. Such blockage will prevent ram air from entering the system.

10. A pilot of a jet airplane needs both an airspeed indicator and a Mach meter.
a) True
b) False
Answer: a
Clarification: True, a pilot of a jet airplane, needs both an airspeed indicator and a Mach meter. The ASI should include a red-and-white striped pointer that automatically moves to indicate the applicable speed limit at a particular instant of time.