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Engineering Thermodynamics

Engineering Thermodynamics
The compression ratio for Diesel engines is

20 to 30
5 to 8
15 to 20
3 to 6

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Engineering Thermodynamics
In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

None of these
Isentropic
Isothermal
Polytropic

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Engineering Thermodynamics
The efficiency of Diesel cycle increases with

None of these
Decrease in cut-off
Increase in cut-off
Constant cut-off

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Engineering Thermodynamics
The entropy __________ in an irreversible cyclic process.

Increases
None of these
Remains constant
Decreases

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Engineering Thermodynamics
According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

Volume, if temperature is kept constant
Temperature
None of these
Absolute temperature, if volume is kept constant

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Engineering Thermodynamics
In open cycle gas turbine plants

All of these
Direct combustion systems is used
A condenser is used
The indirect heat exchanger and cooler is avoided

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