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
View Answer
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
View Answer
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
View Answer
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
c) Adjusting
d) Pressure
View Answer
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
View Answer
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
View Answer
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?
a) Radio Altimeter
b) Radar altimeter
c) Weather altimeter
d) Pressure altimeter
View Answer
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
View Answer
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
View Answer
a
Explanation: True, the greater the frequency shift the further the distance traveled. Such altimeters function by interpreting the time taken by a radio signal, to reflect from the surface of earth back to the aircraft. This information is then used to calculate the altitude of the aircraft.