Module 15/1

In what section of a turbojet engine is the jet nozzle located?

• Turbine.

• Exhaust.

• Combustion.

On a twin rotor fan engine, the high pressure turbine drives

• the fan

• the N1 gas generator

• the high pressure compressor and accessory gearbox

Which statements are true regarding aircraft engine propulsion?

• Turbojet and turbofan engines impart a relatively large amount of acceleration to a smaller mass of air.

• In modern turboprop engines, nearly 50 percent of the exhaust gas energy is extracted by turbines to drive the propeller and compressor with the rest providing exhaust thrust.

• An engine driven propeller imparts a relatively small amount of acceleration to a large mass of air.

If the temperature of the mass of air is increased while its volume is kept constant, then pressure will

• decrease

• stay the same

• increase

There is no peak pressure in a jet engine because of

• continuous flow of air

• constant pressure combustion

• compression in stages

A free turbine engine with two compressor and three turbine is

• three spool

• single spool

• two spool

An example of a divergent duct is the

• propelling nozzle

• passage between the nozzle guide vanes

• jet pipe at the exit from the turbine

In a twin spool compressor system, the first stage turbine drives the

• N1 and N2 compressors.

• N1 compressor.

• N2 compressor.

In what section of a turbojet engine is the jet nozzle located?

• Turbine

• Exhaust

• Combustion

On a twin rotor fan engine, the high pressure turbine drives

•     the fan

•      the N1 gas generator

•     the high pressure compressor and accessory gearbox