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Gas Turbines and Jet Engines

A rocket engine for the combustion of its fuel_____________________?

August 15, 2021January 23, 2019 by admin
A rocket engine for the combustion of its fuel_____________________?

A. carries its own oxygen
B. uses surrounding air
C. uses compressed atmospheric air
D. does not require oxygen
E. depends on electrical energy supplied by solar cells

Categories Compressors, Gas Turbines and Jet Engines

Which of the following fuels can be used in turbojet engines _____________________?

August 15, 2021January 23, 2019 by admin
Which of the following fuels can be used in turbojet engines _____________________?

A. liquid hydrogne
B. high speed diesel oil
C. kerosene
D. demethylated spirit
E. methyl alcohol

Categories Compressors, Gas Turbines and Jet Engines

A jet engine works on the principle of conservation of____________________?

August 15, 2021January 23, 2019 by admin
A jet engine works on the principle of conservation of____________________?

A. mass
B. energy
C. flow
D. linear momentum
E. angular momentum

Categories Compressors, Gas Turbines and Jet Engines

Ram compression in turbojet involves____________________?

August 15, 2021January 23, 2019 by admin
Ram compression in turbojet involves____________________?

A. reduction of speed of incoming air and conversion of part of it into pressure energy
B. compression of inlet air
C. increasing speed of incoming air
D. lost work
E. leakage losses

Categories Compressors, Gas Turbines and Jet Engines

The power available for take off and climb in case of turbojet engine as compared to reciprocating engine is ___________________?

August 15, 2021January 23, 2019 by admin
The power available for take off and climb in case of turbojet engine as compared to reciprocating engine is ___________________?

A. less
B. more
C. same
D. may be less or more depending on ambient conditons
E. unpredictable

Categories Compressors, Gas Turbines and Jet Engines

Intercooling in gas turbine results in ____________________ ?

August 15, 2021January 23, 2019 by admin
Intercooling in gas turbine results in ____________________ ?

A. increase in net output but decrease in thermal efficiency
B. increase in thermal efficiency but decrease in net output
C. increase in both thermal efficiency and net output
D. decrease in both thermal efficiency and net output
E. none of the above

Categories Compressors, Gas Turbines and Jet Engines

If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches _________________?

August 15, 2021January 23, 2019 by admin
If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches _________________?

A. isothermal
B. isentropic
C. adiabatic
D. isochoric
E. isobaric

Categories Compressors, Gas Turbines and Jet Engines

In jet engines, paraffin is usually used as the fuel because of its _________________?

August 15, 2021January 23, 2019 by admin
In jet engines, paraffin is usually used as the fuel because of its _________________?

A. high calorific value
B. ease of atomisation
C. low freezing point
D. A. and C. above
E. none of the above

Categories Compressors, Gas Turbines and Jet Engines

Turbo propeller has the following additional feature over the turbojet __________________?

August 15, 2021January 23, 2019 by admin
Turbo propeller has the following additional feature over the turbojet __________________?

A. peopeller
B. diffuser
C. intercooler
D. turbine and combustion chamber
E. starting engine

Categories Compressors, Gas Turbines and Jet Engines

In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of__________________?

August 15, 2021January 23, 2019 by admin
In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of__________________?

A. vacuum
B. atmospheric air
C. compressed air
D. oxygen alone
E. liquid hydrogen

Categories Compressors, Gas Turbines and Jet Engines
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