If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

Compressors, Gas Turbines and Jet Engines
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

V = Uo

Vi = Vo

Vt > Vo

U < Vo

V = Uo

Vi = Vo

Vt > Vo

U < Vo

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Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

High alloy steel

Carbon steel

High nickel alloy

Stainless steel

High alloy steel

Carbon steel

High nickel alloy

Stainless steel

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Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

7: 1

50: 1.

15: 1

30: 1

7: 1

50: 1.

15: 1

30: 1

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Compressors, Gas Turbines and Jet Engines
The volume of air delivered in a medium capacity air compressor per unit time is

0.1 to 1.2 m³/s

None of these

Above 5 m³/s

0.15 to 5 m³/s

0.1 to 1.2 m³/s

None of these

Above 5 m³/s

0.15 to 5 m³/s

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Compressors, Gas Turbines and Jet Engines
Air-fuel ratio in a jet engine will be of the order of

0.62569444444444

0.41736111111111

2.5006944444444

0.83402777777778

0.62569444444444

0.41736111111111

2.5006944444444

0.83402777777778

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Compressors, Gas Turbines and Jet Engines
Pick up the false statement

Exhaust losses in gas turbine are high due to large mass flow rate

Gas turbine does not require huge quantity of water like steam plant

Overall efficiency of gas turbine plant is lower than that of a reciprocating engine

Gas turbine is a self starting unit

Exhaust losses in gas turbine are high due to large mass flow rate

Gas turbine does not require huge quantity of water like steam plant

Overall efficiency of gas turbine plant is lower than that of a reciprocating engine

Gas turbine is a self starting unit

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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

Compressors, Gas Turbines and Jet Engines The blades of gas turbine are made of

Compressors, Gas Turbines and Jet Engines The air-fuel ratio in gas turbines is of the order of

Compressors, Gas Turbines and Jet Engines The volume of air delivered in a medium capacity air compressor per unit time is

Compressors, Gas Turbines and Jet Engines Air-fuel ratio in a jet engine will be of the order of

Compressors, Gas Turbines and Jet Engines Pick up the false statement

Compressors, Gas Turbines and Jet Engines
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

Compressors, Gas Turbines and Jet Engines
The volume of air delivered in a medium capacity air compressor per unit time is

Compressors, Gas Turbines and Jet Engines
Air-fuel ratio in a jet engine will be of the order of

Compressors, Gas Turbines and Jet Engines
Pick up the false statement