AMTBLK14: Power Plant Systems I Quiz #4 (AMO 110220 14BLK Rosado)

19.What is the purpose of cascade vanes?. Single choice.(5/5 Points)
To reduce engine exhaust noise.
Stops the fan airflow from going aft and redirects it.
Uses turbine exhaust to slow the aircraft during landing.

Stops the fan airflow from going aft and redirects it.

6.When air passes through a Converging duct how is air temperature affected?. Single choice.(5/5 Points)
The temperature rises
The temperature decreases
The temperature remains constant

The temperature decreases

4.What is the advantage of mixing bypass air in the afterburner exhaust?. Single choice.(5/5 Points)
It contains more oxygen and assists combustion in the afterburner.
It provides additional thrust by rotating the turbine wheel.
It cools the combustor can

It contains more oxygen and assists combustion in the afterburner.

.What type of exhaust nozzle is used to gain thrust exceeding Mach 1?. Single choice.(5/5 Points)
Mechanically Blocked
Convergent-Divergent
Fully Augmented

Convergent-Divergent

9.What type of thrust reverser system places a removable obstruction in the exhaust gas stream, usually somewhat to the rear of the nozzle?. Single choice.(5/5 Points)
Mechanical Blockage
Aerodynamic Blockage
Divergent

Mechanical Blockage

6.While performing any type of maintenance on the thrust reverser system what must be done first?. Single choice.(5/5 Points)
Perform an operational check of the system
The reverser system must be mechanically locked out from deploying
Remove all access p

The reverser system must be mechanically locked out from

4.What engine section helps to determine the amount of thrust developed by its shape?. Single choice.(0/5 Points)
What engine section helps to determine the amount of thrust developed by its shape?
Turbine Section
Exhaust Section
Combustion Section

Exhaust Section

1.Why is the rear part of a supersonic exhaust duct enlarged?. Single choice.(5/5 Points)
To accommodate the additional weight or volume of a gas that flows at supersonic rates.
To create additional thrust during takeoff.
To create additional thrust durin

To accommodate the additional weight or volume of a gas that flows

2.In a turbofan engine, the fan produces what percent of the engine thrust?. Single choice.(5/5 Points)
a) 35 percent
b) 50 percent
c) 80 percent

c) 80 percent

3.What are the two types of designs used for exhaust nozzles?. Single choice.(0/5 Points)
Converging and Diverging
Converging and Converging-Diverging
Mechanical and Aerodynamic

Converging and Converging-Diverging

5.How does frequency affect noise?. Single choice.(0/5 Points)
The lower the frequency of the noise, the greater the distance the noise travels.
The lower the frequency of the noise, the lower the distance the noise travels.
The higher the frequency of th

The lower the frequency of the noise, the greater the distance the

7.What type of thrust reverser system doors close behind the engine forming a barrier in the path of escaping exhaust gases?. Single choice.(5/5 Points)
Afterburner doors
Tailpipe doors
Clamshell doors

Clamshell doors

8.In the exhaust system, what is used to change both the engine performance and the exhaust gas temperature?. Single choice.(5/5 Points)
Afterburner
Main Throttle control
Adjusting the area of the exhaust nozzle

Adjusting the area of the exhaust nozzle

0.When air passes through a diverging duct how is air velocity affected?. Single choice.(5/5 Points)
The velocity increases
The velocity decreases
The velocity remains constant
Option 2

The velocity decreases

1.What are the two categories of thrust reversers?. Single choice.(5/5 Points)
Convergent and Divergent
Mechanical Blockage and Aerodynamic Blockage
All of the above.

Mechanical Blockage and Aerodynamic Blockage
All of the above.

13.What exhaust component is used on military aircraft engines that are installed within an aircraft fuselage to protect the airframe?. Single choice.(5/5 Points)
Afterburner
Tailpipe
Thrust Reversers

Tailpipe

15.What component of the exhaust system straightens and smooth's the exhaust gas to extract the greatest possible thrust?. Single choice.(0/5 Points)
Exhaust Cone
Afterburner
Intake Duct

Exhaust Cone

17.What are the two classifications of Turbofan engines?. Single choice.(5/5 Points)
Ducted and Unducted
Converging and Diverging
Class 1 and Class 2

Ducted and Unducted

18.How do noise suppressors currently in use reduce noise levels in a gas turbine engine?. Single choice.(5/5 Points)
Breaks up the single, main jet exhaust stream into a number of smaller jet streams.
Combines the number of smaller jet streams into one l

Breaks up the single, main jet exhaust stream into a number of smaller jet streams.

.What system uses the aircraft's main engines to direct thrust other than parallel to the vehicle's longitudinal axis?. Single choice.(5/5 Points)
Afterburner System
Thrust Reverser System
Thrust vectoring System

Thrust vectoring System