Engineering Questions with Answers - Multiple Choice Questions
MCQs on Answers – Fundamentals – Engine
1 - Question
An aircraft engine generates __________ power.
a) Electrical
b) Mechanical
c) Thermal
d) Hydraulic
View Answer
b
Explanation: An aircraft engine is a component of the propulsion system for an aircraft that generates mechanical power. The power generated is used to keep the aircraft flying high in the air.
2 - Question
The General Electric GE90 is a family of high-bypass __________ aircraft engines.
a) Turboshaft
b) Turboprop
c) Turbojet
d) Turbofan
View Answer
d
Explanation: The General Electric GE90 is a family of high-bypass turbofan aircraft engines. It is built for the Boeing 777 by GE aviation. The engine offers thrust ratings from 81,000 to 115,000 lb.
3 - Question
The Rolls-Royce Trent 900 is one of the power plant options for which of the following?
a) Airbus A380
b) Boeing 747
c) Airbus A320
d) Airbus A350
View Answer
a
Explanation: The Rolls-Royce Trent 900 is a turbofan engine and is one of the power plant options available for the Airbus A380. Another power plant option for the A380 is the Engine Alliance GP7000.
4 - Question
Which is the largest jet engine in the world?
a) GE90
b) Trent 800
c) PW4000
d) GE9X
View Answer
d
Explanation: The GE9X is the largest jet engine in the world, it is as wide as the body of a Boeing 737. The engine is manufactured by General Electric for the Boeing 777X.
5 - Question
A turboprop is very efficient when operated at cruise speed of __________
a) 200-400 mph
b) 20-40 mph
c) 10-100 mph
d) 600-800 mph
View Answer
a
Explanation: Turboprops are extremely efficient when operated at cruise speeds of 200 to 400 mph. This is the ideal cruise speed for such engines, thus providing such efficiency.
6 - Question
In jet engines the oxygen necessary for fuel combustion comes from the air.
a) True
b) False
View Answer
a
Explanation: True, in jet engines the oxygen necessary for fuel combustion comes from the air. The jet engines take in required oxygen through the engine blades and the process of combustion takes place.
7 - Question
The last airliner that used turbojets was the __________
a) Boeing 737
b) Airbus A330
c) Concorde
d) Boeing 767
View Answer
c
Explanation: Concorde was the last airliner that used turbojet. The Mach 2 airspeed offered by Concorde proved the engine to be highly efficient. Other aircrafts could not match such airspeeds.
8 - Question
Which of the following is not an aircraft engine manufacturer?
a) BMW
b) General Electric
c) Pratt & Whitney
d) Rolls-Royce
View Answer
a
Explanation: In commercial aviation, the major players in the manufacturing of turbofan engines are Pratt & Whitney, General Electric, Rolls-Royce, and CFM International.
9 - Question
How many types of gas turbine engines are manufactured?
a) 2
b) 4
c) 1
d) 10
View Answer
b
Explanation: There are four types of gas turbine engines: the turbojet, the turbofan, the turboprop, and the turboshaft.
10 - Question
CFM56-3 is a turbofan engine.
a) True
b) False
View Answer
a
Explanation: The CFM56 series is a family of high-bypass turbofan aircraft engines made by CFM International. CFM International is a French-American company headquartered in Cincinnati, Ohio, United States.
11 - Question
Rolls-Royce Trent 800 engine generates a maximum thrust of __________
a) 9,500lb
b) 95,000lb
c) 950lb
d) 9,50,000lb
View Answer
b
Explanation: The Rolls-Royce Trent 800 engine generates a maximum thrust of 95,000lb. It was designed to be used on the Boeing 777 and was first produced in 1996.
12 - Question
High-bypass turbofans are usually most efficient when the aircraft is traveling at __________
a) 500-550 mph
b) 50-55 mph
c) 20-25 mph
d) 200-250 mph
View Answer
a
Explanation: High-bypass turbofans are usually most efficient when the aircraft is traveling at 500 to 550 miles per hour (800 to 885 km/h) i.e. the cruise speed of most large airliners.
13 - Question
In general aviation, the dominant manufacturer of turboprop engines has been __________
a) Maserati
b) Pratt & Whitney
c) Boeing
d) Airbus
View Answer
b
Explanation: In general aviation, the dominant manufacturer of turboprop engines has been Pratt & Whitney. However, General Electric in 2015 its entrance into the market.
14 - Question
Turboshaft engines are used primarily for __________
a) UAVs
b) Commercial aircrafts
c) Cars
d) Helicopters
View Answer
d
Explanation: Turboshaft engines are used primarily for helicopter. A turboshaft engine is similar to a turboprop in principle, but in turboshaft the engine does not provide any physical support to the helicopter’s rotors.
15 - Question
What is the full form of TEL?
a) Tetraethyllead
b) Tetraethylenelead
c) Tetraethollead
d) Tetraethanelead
View Answer
a
Explanation: Tetraethyllead (TEL) is blended with aviation gasoline, to be used as a fuel for aircrafts. The blend increases the fuel efficiency.