6-12.
Compressor stalls may be eliminated by using
which of the following systems?
1.
Rotor vane and stator vane system
2.
Inlet guide vane and stator vane system
3.
Front and rear compressor system
4.
Compressor bleed-air system and variable
vane system
6-13.
Which of the following is NOT a basic
requirement for a satisfactory and efficient
combustion chamber system?
1.
Light weight
2.
A minimum pressure drop
3.
A high rate of burning
4.
Can-annular design
6-14.
Fuel
is
introduced
into
the
combustion
chamber at what location?
1.
Back of the combustion chamber
2.
Top of the combustion chamber
3.
Front of the combustion chamber
4.
Bottom of the combustion chamber
6-15.
A gas turbine engine normally has provisions
for what total number of igniter plugs in the
combustion chamber?
1.
One
2.
Two
3.
Three
4.
Four
6-16.
The flame from the chambers containing the
igniter plugs is spread to the remaining
chambers through what design feature?
1.
Guide vanes
2.
Drilled holes
3.
Flame tubes/cross ignition tubes
4.
Louvers
6-17.
What percent of the air in the combustion
chamber actually takes part in the combustion
process?
1.
25%
2.
35%
3.
45%
4.
55%
6-18.
Secondary air is used in the combustion
chamber for what purpose?
1.
To dilute and cool the hot gases
2.
To help the combustion process
3.
To drive the compressor
4.
To drive the turbine
6-19.
What function does the turbine assembly
serve?
1.
It develops exhaust gas power
2.
It reduces the speed of the compressor
3.
It increases the turbine gas temperatures
4.
It drives the compressor
6-20.
The flowing gases from the combustion
chamber of a turbojet engine act directly
against what engine component?
1.
Impeller
2.
Compressor
3.
Turbine disk blades
4.
Auxiliary equipment
6-21.
Turbine blades are normally made from what
material alloy?
1.
Copper
2.
Aluminum
3.
Magnesium
4.
Steel
6-22.
What is the function of the inner cone in the
exhaust section?
1.
To eliminate exhaust gas turbulence
2.
To direct air to the outer exhaust cone
3.
To give support to the exit guide vanes
4.
To cool the turbine wheel
6-23.
The inner cone is attached to the outer cone by
what means?
1.
Copper alloy tubes
2.
Streamlined vanes called brace assemblies
3.
Stainless steel sheets
4.
Tapered cylinder-shaped brackets
6-24.
The exhaust cone is made from what material?
1.
Aluminum alloy
2.
Stainless steel sheets
3.
High-temperature alloy
4.
Low-temperature alloy
6-25.
What material is used to insulate the cone?
1.
High-temperature alloy
2.
Copper sheets
3.
Aluminum alloy sheets
4.
Aluminum foil
6-26.
The turboprop engine is capable of developing
what maximum horsepower per pound of
weight?
1.
1/2 hp
2.
1 1/2 hp
3.
2
hp
4.
2 1/2 hp
6-22
