Aircraft Performance Questions and Answers – Measurement of Air Data

This set of Aircraft Performance Multiple Choice Questions & Answers (MCQs) focuses on “Measurement of Air Data”.

a) Airflow Direction Detector
b) Aircraft Direction Detector
c) Airflow Density Detector
d) Aircraft Density Detector

Explanation: ADD stands for airflow direction detector. The function of airflow direction detector is to sense the local flow direction relative to the aircraft body axes and these are the part of the aircraft system.

2. The essential requirement of air data measurement is the state of the atmosphere in which the aircraft is flying.
a) True
b) False

Explanation: The essential requirement of air data measurement is the state of the atmosphere in which the aircraft is flying. The second essential requirement of air data measurement is the relative motion between the aircraft and the air mass.

3. Air data measurement does not consider the relative motion between the aircraft and the air mass.
a) True
b) False

Explanation: The essential requirement of air data measurement is the relative motion between the aircraft and the air mass. The second essential requirement of air data measurement is the state of the atmosphere in which the aircraft is flying.

a) Aircraft Data Computer
b) Air Data Computer
c) Air Density Computer
d) Air Data Computation

Explanation: ADC stands for air data computer. This is a device installed in aircraft to convert pressure into electrical signals. The conversion is done with the help of transducers which help in processing the electrical signals.

5. ADC is a pure mechanical instrument installed in an aircraft.
a) True
b) False

Explanation: ADC is an electrical power based system and not a pure mechanical instrument. ADC stands for air data computer. This is a device installed in aircraft to convert pressure into electrical signals. The conversion is done with the help of transducers which help in processing the electrical signals.
Note: Join free Sanfoundry classes at Telegram or Youtube

6. 1 knot=________km/hr
a) 1.773
b) 1.852
c) 1.609
d) 1.414

Explanation: 1 knot=1.852 km/hr. Knot stands for nautical miles per hour. Conversion of nautical miles to kilometers is 1 nautical mile=1.852km. Hence, 1 knot=1.852 km/hr.

7. 1 foot=_________meters
a) 3.28084
b) 0.3678
c) 0.3048
d) 3.4567

Explanation: 1 foot=0.3048 meters. Foot is unit of length or distance in general system whereas meter is a standard unit. Meter is the S.I unit of length in MKS system and used by everyone throughout the world.

8. Which of the following are measured by Pitot – static system in air data system?
a) Height, mach number, airspeed
b) Pressure, density, temperature
c) Height, mach number, pressure
d) Height, mach number, density

Explanation: Height, mach number, airspeed are the quantities measured by Pitot – static system in air data system. They convert the air fed pressures into the movement of a pointer in mechanical instrument.

9. Pitot-static system is a primary flight instrument.
a) True
b) False

Explanation: Pitot-static system is not a primary measuring instrument. The altimeter, indicator and mach meter are the primary flight instruments. The secondary flight instruments are air temperature sensor and ADD’s.

10. ADD is a secondary flight instrument.
a) True
b) False

Explanation: The secondary flight instruments are air temperature sensor and ADD’s. The altimeter, indicator and mach meter are the primary flight instruments. The primary instruments are mechanical instruments whereas the secondary instruments are electrical power based instruments.

Sanfoundry Global Education & Learning Series – Aircraft Performance.

To practice all areas of Aircraft Performance, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]