Jet Engine Propulsion Typical Ultilearn

JET ENGINE PROPULSION – TYPICAL ULTILEARN QUESTIONS

1. In 1930, who first patented a design for a reaction (jet) type motor suitable for aircraft propulsion?
a) Sir Frank Whittle
b) Sir Henry Royce
c) Hon. Charles Rolls
d) Henry Ford
2. What is an advantage axial flow compressors have compared to centrifugal compressors?
a) Axial flow compressors are less complicated
b) Axial flow compressors are lighter
c) Axial flow compressors can surge
d) Axial flow compressors achieve higher pressure ratios
3. Which type of thrust reverser is fitted to the Tornado?
a) Translating cowl
b) Pivot doors
c) Transmission cowl
d) Target doors
4. Reverse thrust is simply a method of altering what?
a) Increasing thrust without increasing the engines frontal area
b) The cooling of the engine
c) Jet reaction
d) The primary airflow
5. Which application or type of operation best suits the turbojet engine?
a) In high speed aircraft where low frontal area is an advantage
b) In static engines in industrial use
c) In low speed aircraft operating at low altitudes
d) In helicopters
6. Which of these is a turboprop engine?
a) RB211
b) Dart
c) Adour
d) Spey
7. A turbine is made up of a number of stages, each stage consisting of nozzle guide vanes (NGV's) and rotor blades. How are these arranged?
a) NGV's are on top of rotor blades
b) Rotor blades are on top of NGV's
c) NGV's are in front of rotor blades
d) Rotor blades are in front of NGV's

8. The drawing indicates which type of thrust reverser system?
a) Ramjets
b) Clamshell doors
c) Translating Cowl
d) Retractable ejector
9. What is the nominal air to fuel ratio (by weight) supplied to an engine?
a) 10:01
b) 02:01
c) 15:01
d) 01:02
10. Approximately how much of the mass airflow through the combustion section is actually used for combustion?
a) 82%
b) 43%
c) 92%
d) 18%
11. Approximately how much of the mass airflow through the combustion section is used for the dilution (flame cooling) airflow?
a) 82%
b) 40%
c)