Engineering Questions with Answers - Multiple Choice Questions

# MCQs on Instrument Shop – Altimeter

1 - Question

Air pressure decreases with an increase of altitude.
a) True
b) False

a
Explanation: True, the air pressure decreases with an increase of altitude. The increase is approximately 100 hectopascals per 800 meters, or roughly one inch of mercury per 1000 feet

2 - Question

The reference pressure in Canada and the United States, is noted in which of the following units?
a) Meters of mercury
b) Inches of mercury
c) Hectopascals
d) Pascals

b
Explanation: The reference pressure in Canada and the United States, is noted in inches of mercury. Elsewhere, it is noted in hectopascals. It is displayed in the small Kollsman window, on the face of the aircraft altimeter.

3 - Question

What is the full form of ISA?
a) International Stationary Atmosphere
b) Internal Standard Atmosphere
c) International Standard Atmosphere
d) Internal Stationary Atmosphere

c
Explanation: ISA refers to International Standard Atmosphere. It is a static atmospheric model established to provide a common reference for temperature and pressure.

4 - Question

In a sensitive altimeter, the sea-level reference pressure can be adjusted with a __________ knob.
a) Setting
b) Calibrating
d) Pressure

a
Explanation: The sea-level reference pressure can be adjusted with a setting knob. The knob is located on the altimeter. Modern aircraft use sensitive altimeters.

5 - Question

Radio altimeters are used up to ___________
a) 2500 feet
b) 3000 feet
c) 250 feet
d) 300 feet

a
Explanation: Radio altimeters give data to the auto throttle which is a part of the Flight Computer. Radio altimeters only give readings up to 2,500 feet above ground level. Above 2,500 feet, other systems are used to determine the fight altitude.

6 - Question

Which of the following is the value of the atmospheric pressure, used to adjust the sub-scale of a pressure altimeter?
a) Barometric setting
b) Atmospheric setting
c) Altimeter setting
d) Altitude setting

c
Explanation: Altimeter setting is the value of the atmospheric pressure, used to adjust the sub-scale of a pressure altimeter. It is done so that it indicates the height of an aircraft above a known reference surface, such as mean sea level.

7 - Question

What is a barometer supplied with a nonlinear calibration, so as to indicate altitude called?
c) Weather altimeter
d) Pressure altimeter

d
Explanation: Pressure altimeter may also be referred to as barometer’s which are equipped with a nonlinear calibration. Such calibration is done so as to indicate altitude. Further, these instruments may also be called as barometric altimeter.

8 - Question

The altimeter is used to shows the aircraft’s __________
a) Altitude
b) Airspeed
c) True speed
d) Mach speed

The altimeter is used to shows the aircraft’s __________
a) Altitude
b) Airspeed
c) True speed
d) Mach speed

9 - Question

In a radar altimeter, the greater the frequency shift the further the distance traveled.
a) True
b) False