Lesson 5 Review

In a gas turbine engine, the pressure is highest:

• after the high pressure compressor

• after the combustion chamber

• at the engine inlet guide vanes

In a gas turbine engine, the velocity is highest:

• at the air intake

• at the high pressure turbine

• exhaust

Which is the most commonly used thrust reversals on commercial aircraft?

• Cascade Thrust Reversers

• Target Type Thrust Reversers

• Bucket Door Thrust Reversers

Which Statement is TRUE?

• Turbofan engines do not require noise suppressors

• Noise Suppressors creates smaller air streams with low frequency sound

• The Harrier Jump Jet uses its 4 nozzles for VTOL only

Accessory Gear box is used to supply:

• Electrical and hydraulic power

• Air Conditioning and hydraulic power

• Air starting to other engines and drive the fuel pump

Which gear part allows transfer of power from one direction (axial) to another (radially)?

• Spur Gear

• Hunting Tooth Gear Meshes

• Bevel Gear

The N2 high pressure compressor blades can be inspected:

• using boroscope at appropriate access ports in the HP compressor, and manually cranking the external gearbox

• visually and by spinning the N2 blades by hand

• using boroscope from the external gearbox to gain access to the HP compressor

If an accessory unit fails in the external gearbox, the other drives are protected by:

• use of bevel gears

• design of shear neck in drive shaft

• shutting down the external gearbox to prevent further damage