Aircraft Propulsion MCQs : This section focuses on the "Aircraft Propulsion". These Multiple Choice Questions (MCQs) should be practiced to improve the Aircraft Propulsion skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Gas turbines are used in aircraft propulsion because
A. they are light
B. they are compact
C. they have high power-to-weight ratio
D. all of the mentioned
Question 2
In aircraft propulsion the most widely used engine is
A. turbojet
B. turbofan
C. turboprop
D. all of the mentioned
Question 3
In the ideal case, turbine work is greater than the compressor work.
A. TRUE
B. FALSE
Question 4
In turbofans, the bypass ratio is 5-6 and in turboprop it is as high as 100.
A. TRUE
B. FALSE
Question 5
Increasing the bypass ratio of turbofan engine ____ thrust.
A. does not affect
B. decreases
C. increases
D. none of the mentioned
Question 6
Removing the cowl from the fan gives us
A. turbojet
B. turbofan
C. turboprop
D. all of the mentioned
Question 7
The air-fuel ratio used in jet engine is very small.
A. TRUE
B. FALSE
Question 8
The bypass ratio is the ratio of
A. mass flow rates of two streams
B. pressure ratio of inlet and exit
C. volume flow rate of inlet and exit
D. none of the mentioned
Question 9
The processes in compressor, turbine, diffuser and nozzle are
A. reversible
B. adiabatic
C. reversible and adiabatic
D. none of the mentioned
Question 10
The propulsive efficiency is given by
A. work done by engine / propulsive power
B. propulsive power / work done by engine
C. energy input rate / propulsive power
D. propulsive power / energy input rate
Question 11
The thrust developed in turbojet engine is the
A. unbalanced force
B. balanced force
C. both of the mentioned
D. none of the mentioned
Question 12
The type of aircraft gas turbines include
A. turbojet
B. turbofan
C. turboprop
D. all of the mentioned
Question 13
We cannot use regenerators and intercoolers on aircraft engines.
A. TRUE
B. FALSE
Question 14
When flying at high altitudes,
A. air is of less density
B. air exerts less drag force on aircraft
C. both of the mentioned
D. none of the mentioned
Question 15
Which of the following statement is true?
A. mass flow rates of gases at engine inlet and exit are same
B. the pressure at inlet and exit of engine are ambient pressures
C. both of the mentioned
D. none of the mentioned