Aerospace Engineering: Exhaust Nozzle Design Quiz

The converging portion of the exhaust nozzle accelerates the turbine exhaust gases to subsonic speed at the narrowest part of the duct.

The diverging portion of the exhaust nozzle further accelerates the exhaust gases to above the speed of sound.

The accessory drive of a gas turbine engine powers only the engine accessories, not the aircraft accessories.

The accessory section of a gas turbine engine also acts as a sump for oil storage.

The converging-diverging duct design in an exhaust nozzle always increases in diameter from front to back.

The power needed to drive the accessories in a gas turbine engine is typically taken from a separate power shaft, not the main engine's power shaft.

The exhaust cone assembly consists of an outer duct, inner cone, radial solid struts, and tie rods.

A tail pipe is an extension of the exhaust section that directs exhaust gases from the exhaust cone to the accessory drive.

Tail pipes are used exclusively with engines installed in a nacelle or pod.

An exhaust nozzle provides exhaust gases with a boost in velocity.

Converging and converging-diverging are two types of exhaust nozzle designs used on aircraft.

On a converging exhaust nozzle, the nozzle diameter increases from front to back.

The turbine in a turbojet engine absorbs approximately 60 to 80% of the total pressure energy from the exhaust gases.

The turbine section of a turbojet engine is located upstream of the combustion section.

A typical turbine casing has flanges on both ends for attaching the turbine section to the exhaust assembly.

The turbine nozzle in a gas turbine engine is typically exposed to the lowest temperatures.

The turbine stator element is most commonly referred to as the turbine inlet nozzle.

The turbine extracts energy from the hot gases and expands them to a higher pressure and temperature.