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Jet Engine Types and Functions

This document discusses different types of aircraft gas turbine engines and their components and operating characteristics. It provides definitions and descriptions of turbofan, turboprop, turbojet, and turboshaft engines. Additionally, it examines components like inlet cones, compressors, exhaust nozzles, thrust reversers, and lubrication systems. Finally, it addresses factors that can cause compressor stall and surge and describes the functions of an auxiliary power unit.

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John Gabriel Decena
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598 views1 page

Jet Engine Types and Functions

This document discusses different types of aircraft gas turbine engines and their components and operating characteristics. It provides definitions and descriptions of turbofan, turboprop, turbojet, and turboshaft engines. Additionally, it examines components like inlet cones, compressors, exhaust nozzles, thrust reversers, and lubrication systems. Finally, it addresses factors that can cause compressor stall and surge and describes the functions of an auxiliary power unit.

Uploaded by

John Gabriel Decena
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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AIRCRAFT POWERPLANT (JET ENGINES)

1. A gas turbine engine which gets 100% of its power from the core engine.
a. Turbofan
b. Turboprop
c. Turbojet
d. Turboshaft
2. Which of the following types of gas turbine engines produces the highest propulsive efficiencies at airspeed below 400
mph?
a. Turbojet
b. Turboprop
c. Turboshaft
d. Turbofan
3. It is used to increase the service life of an engine. It is a fixed limitation for the maximum thrust of an engine on a range
of ambient temperatures.
a. Flat rating
b. Idle rating
c. Go-around rating
d. Max power rating
4. In military aircrafts equipped with supersonic inlet cone, when the aircraft goes supersonic, the cone moves outward
the inlet duct to____________.
a. Produce multiple oblique shock waves and a normal shock wave to reduce the airflow velocity
b. Allow the supersonic air to slightly cool down before entering the inlet to prevent compressor stall
c. Prevent compressor stall by increasing the ram pressure of the airflow entering the inlet
d. To increase mass airflow entering the inlet duct to increase thrust
5. What is one advantage of a centrifugal compressor over axial compressor?
a. Higher compressor efficiency at optimum speed
b. Higher achievable total pressure ratio
c. High starting power requirements
d. Higher pressure rise per stage
6. Which of the following can be a cause of compressor stall and surge?
a. Activation of bleed air valves
b. LP and HP Compressor at optimum rpm
c. Rapid increase in fuel flow and high rpm which cause high burner pressure
d. Transient operation at supersonic speeds and activation of VIGV
7. The part of turbine engine exhaust section which has the purpose of channeling and collecting turbine discharge gases
into single jet.
a. Exhaust cone
b. Exhaust duct
c. Exhaust nozzle
d. Exhaust pipe
8. A type of thrust reverser which is commonly used on high bypass ratio turbofan engines.
a. Bucket type
b. Clamshell door type
c. Cascade type
d. Blow out type
9. In a turbine engine hot tank lubrication system, the oil cooler is in the___________.
a. Pressure subsystem
b. Scavenge subsystem
c. Vent subsystem
d. Drain subsystem
10. APU provides____________
a. Hydraulic and electric power
b. Pneumatic and electric power
c. Electrical power only
d. Pneumatic power only

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