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TURBINE MIDTERM 3

Which type of duct design is used on a supersonic aircraft?

Divergent

Convergent

C-D duct

Reverse flow

What is the purpose of using vortex generators?

To provide electrical power for the aircraft while on the ground

To create a low pressure at the engine inlet for positive airflow into the compressors

Create a vortex for ground-enhanced vernacular articulation

To provide smooth airflow into the compressor

What are the 3 types of engine compressors?

Axial, centrifugal & combination

Convergent, axial & combination

Divergent, centrifugal & combination

Axial, reverse flow and convergent

Which aircraft type commonly uses centrifugal compressors?

Wide-body aircraft like the B-747

Supersonic aircraft

Military fighter jets

Turboprop aircraft

Which of the following is NOT a cause of compressor stall?

Dirty exhaust nozzle

Salt deposits on compressor blades

A high aircraft angle of attack

A defective compressor bleed valve

Which of the following is NOT a method of compressor blade-to-hub attachment?

Dovetail

Fir tree

Bulb type

Rack & pinion

What is the main reason for designing compressor blades with a twist?

To prevent the blade tips from reaching the speed of sound

To provide even acceleration of air from root to tip

To improve stall characteristics

They look prettier

Which of the following systems uses compressor bleed air?

Autopilot system

Primary flight control system

Aircraft environmental control system

Secondary flight control system

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