M15 Gas Turbine Engine Sub-Module No 7 (Quiz-1)

 

15.7 Exhaust

Quiz

 

1. Exhaust section impart a ---------- to the gases ?
   1.   High initial velocity
   2.   High final velocity
   3.   High final acceleration
2. Swirling exhaust gases leave the turbine at an angle of approximately ?
   1.   45°
   2.   40°
   3.   48°
3. Thrust vectoring is used by ?
   1.   Commuter aircraft
   2.   Light sport aircraft
   3.   Military aircraft
4. The pilot can move, or vector, the vectoring nozzle up and down by ?
   1.   22°
   2.   21°
   3.   20°
5. The advantage of a convergent-divergent nozzle is greatest at ?
   1.   High mach numbers
   2.   Low mach numbers
   3.   Below one mach
6. There are --------------- types of exhaust nozzle designs ?
   1.   One
   2.   Two
   3.   Three
7. The outer shell or duct of exhaust section is usually made of ?
   1.   Alloy steel
   2.   Stainless steel
   3.   Steel
8. Noise from turbulence of a coarser type portion has a much ?
   1.   High frequency
   2.   Fine frequency
   3.   Lower frequency
9. Which is the best source for reverse thrust ?
   1.   Fan
   2.   Turbo jet engine
   3.   Mechanical linkage
10. The fan air which creates most of the thrust ?
    1.   75–85 percent total thrust
    2.   80–85 percent total thrust
    3.   80–88 percent total thrust