M15 Gas Turbine Engine Sub-Module No 17 (Quiz : No 1)

Turboshaft Engines

Quiz

 

1. The turbo shaft engine’s output is measured in ?
   1.   Horsepower
   2.   Thrust
   3.   Shp
2. The primary purpose for turbo shaft engines in aviation is their use as the main power plant for ?
   1.   Turbojet aircraft
   2.   Turbofan aircraft
   3.   Helicopters
3. The drive shaft itself must also carry ?
   1.   Tension loads
   2.   Compression loads
   3.   Torsion loads
4. The power plant is controlled between ground and flight idle by the ?
   1.   Free turbine governor
   2.   Throttle twist grip
   3.   Auto governor
5. The N1 system will speed up and slow down as a function of ?
   1.   N2
   2.   N7
   3.   N4
6. The collective stick, when raised, the angle of attack of all rotor blades ?
   1.   not related to stick
   2.   will decrease
   3.   will increase
7. The _____ allows for small movements between the engines and the transmission ?
   1.   Fexible coupling
   2.   A sprag clutch
   3.   Rigid coupling
8. Helicopter rotors tend to rotate at ?
   1.   3000-4000 rpm
   2.   300-400 rpm
   3.   1600-1700 rpm
9. About___________ of the energy produced by a helicopter turbo shaft engine is used to operate the gas generator ?
   1.   Half
   2.   Two thirds
   3.   One thirds
10. The function of ----- is to reduce the high rpm from the engine to a propeller RPM ?
    1.   Propeller speed governor
    2.   Power lever
    3.   Reduction gear assembly

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Types Of Seals Used In A Gas Turbine Engine

Oil Seals

The oil seals maybe 

1. The labyrinths 
2. Thread (helical) type
3. Carbon Type

Carbon Type Seal

These seals are usually spring-loaded and are similar in material and application to the carbon brushes used in electrical motors Carbon seals rest against a surface provided to create a sealed bearing cavity or void Thus, the oil is prevented from leaking out along the shaft into the compressor airflow or the turbine section.

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Gas Turbine Engine main Components

 Gas Turbine Engine

Convert Chemical Energy into Heat Energy and then convert This heat energy into mechanical energy

        There are 5 major sections of  Gas Turbine Engine

1. Intake Section
2. Compressor Section
3. Combustion Section
4. Turbine Section
5. Exhaust Section

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Types Of Combustion Chamber In Gas Turbine Engine

There are three types of the combustion chamber of the Gas Turbine Engine.

• Can type combustion chamber

• Annular combustion chamber

• Can Annuller combustion chamber 

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M15 Gas Turbine Engine Sub-Module No 16 (Quiz :1)

Turbo Prop Engine

Quiz

 

1. As the aircraft speed increases over 450 mph the propeller will rapidly ------?
   1.   Gain efficiency
   2.   Lose efficiency
   3.   Experience high airflow
2. Turbo-propeller engines, use a propeller to convert ------ into thrust and do not rely on gas exit velocity ?
   1.   Centripetal force
   2.   Compressor power
   3.   Turbine power
3. The governor flyweights spin ---- and ------ to lift the control valve ?
   1.   Faster, outwards
   2.   Slower , inward
   3.   Faster , forward
4. Most reduction gear assemblies use a ------- reduction ?
   1.   Planetary gear
   2.   Spur gear
   3.   Epicyclic reduction gear
5. The function of ----- is to reduce the high rpm from the engine to a propeller rpm ?
   1.   Propeller speed governor
   2.   Power lever
   3.   Reduction gear assembly
6. The power output of a turbo-propeller engine is stated in ?
   1.   Horsepower
   2.   Thrust horsepower (thp)
   3.   Shaft horsepower (shp)
7. The maximum propeller speed for any power lever angle is controlled by the ?
   1.   Propeller speed governor
   2.   Propeller pitch control unit (pcu)
   3.   Fuel supply
8. When it is increased the propeller blade angle increases to absorb the increased engine power output ?
   1.   Engine rpm
   2.   Aircraft speed
   3.   Fuel supply
9. Turbo-propeller control assemblies have a feathering system that feather the propeller when the engine is shut down -----?
   1.   During take off/ landing
   2.   At ground
   3.   In flight
10. Over-speeds cause extreme ------ to the propeller and the engine and can lead to rapid and total failure and in some cases to the loss of the aircraft in flight ?
    1.   Torque
    2.   Stress
    3.   Load

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M15 Gas Turbine Engine Sub-Module No 15 Power Augmentation (Quiz :1)

Power Augmentation

Quiz

 

1. As the atmospheric pressure decreases with altitude, and/or the ambient air temperature increases ?
   1.   There is, a reduction in thrust
   2.   There is, a increase in thrust
   3.   There is, a increase in shaft horsepower
2. The injection of coolant into the combustion chamber inlet is usually more suitable for ?
   1.   Centrifugal flow compressor engines
   2.   Axial flow compressor engines
   3.   Reciprocating Engine
3. Water injection systems are not normally used on ?
   1.   Turbojet engines
   2.   Low bypass turbofan engines
   3.   High bypass turbofan engines
4. While water is flowing In Augmentation Sytem Resulting RPM is usually----- ?
   1.   Lower
   2.   Higher
   3.   Constant
5. Afterburning provides the best method of thrust augmentation for ?
   1.   Short periods
   2.   Long periods
   3.   During landing
6. The area of the afterburning jet pipe is larger than a normal jet pipe would be for the same engine to obtain a ?
   1.   Reduced velocity gas stream
   2.   Increased velocity gas stream
   3.   Reduced pressure gas stream
7. The temperature of the afterburner flame can be in excess of ?
   1.   1500 deg c
   2.   1600 deg c
   3.   1700 deg c
8. The thrust of an afterburning engine, without afterburning in operation, is _______ than that of a similar engine not fitted with afterburning equipment ?
   1.   Slightly more
   2.   Slightly less
   3.   Considerably more
9. The afterburning jet pipe is made from a heat resistant ?
   1.   Copper alloy
   2.   Titanium alloy
   3.   Nickel alloy
10. Fuel is sprayed in to the flame area between the flame stabilizers from holes in the?
    1.   Downstream edge of the manifolds
    2.   Upstream edge of the manifolds
    3.   Midtream edge of the manifolds

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