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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