COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

The ideal efficiency of simple gas turbine cycle depends on

Minimum cycle temperature

Maximum cycle temperature

All of these

Pressure ratio

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The effective power of gas turbines is increased by adding the following in compressor

Nitrogen

Ammonia and water vapour

Hydrogen

Carbon dioxide

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Ratio of indicated h.p. to shaft h.p. in known as

Mechanical efficiency

Volumetric efficiency

Compressor efficiency

Isothermal efficiency

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Turbofan engine employs

Two or more air streams

No air stream

Solid fuel firing

One air stream

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In a double acting compressor, the air is compressed

In a single cylinder on both sides of the piston

In two cylinders

In two cylinders on both sides of the piston

In one cylinder

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In turbo fan engine, the jet velocity as compared to turbojet engine is

Same

May be less or more depending upon speed

More

Less

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The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

Volumetric efficiency

Isothermal efficiency

Mechanical efficiency

Compressor efficiency

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The indicated work per unit mass of air delivered is

Greatly affected by clearance volume

Not affected by clearance volume

Directly proportional to clearance volume

Inversely proportional to clearance volume

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The blades of gas turbine are made of

High alloy steel

Stainless steel

Carbon steel

High nickel alloy

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The maximum temperature in a gas turbine is

1000°C

700°C

500°C

200°C

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