GAS TURBINE BLEED AIR – Air – DGCA Question Bank For Politics

#1. An inter-stage air seal is used where:

Engine sections are operating at different pressures.

Engine sections are subjected to pressures of the same value.

It is more convenient.

It is difficult to obtain access during routine servicing.

#2. An Internal Engine Overheat warning would necessitate:

The oil temperature to be closely monitored.

The EGT to be closely monitored.

The engine power to be reduced to idle.

The engine to be shut down.

#3. Turbine blades are cooled by:

H.P. compressor air internally ducted through the blades.

H.P. air tapped from the combustion chambers.

Air ducted from just before the intake guide vanes.

Intermediate pressure air taken from the bleed valves.

#4. Bleed air for engine anti-icing is provided by:

The bleed valves

The turbine stages.

The compressor.

The combustion chambers.

#5. The efficiency of a bearing chamber oil seal depends on its mechanical design and:

The fuel pressure.

Compressor bleed air pressure.

The engine compression ratio.

The engine oil pressure.

#6. With a bleed air anti-icing system the effect of selecting ‘on’ while maintaining thrust will:

Decrease fuel consumption.

Decrease specific fuel consumption.

Increase specific fuel consumption.

Specific fuel consumption will remain the same.

#7. Which of the following ice removal methods does a modern jet aircraft normally utilize?

Hot air.

Rubber boots.

Electrical thermal blankets.

FPD freezing point depressant fluid.

#8. With a bleed air anti-icing system the effect of selecting ‘on’ will have what effect?

EGT will decrease.

EGT will increase.

EGT will remain the same.

The ratio between exhaust pressure and intake pressure will increase.

#9. The air obtained from the engine for air conditioning is essentially:

High pressure low volume

High pressure high volume

Low pressure low volume

Low pressure high volume

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