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Engineering Thermodynamics

Engineering Thermodynamics
The compression ratio for Diesel engines is

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

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Engineering Thermodynamics
For which of the following substances, the gas laws can be used with minimum error

Superheated steam
Wet steam
Saturated steam
Dry steam

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Engineering Thermodynamics
On volume basis, air contains following parts of oxygen

21
23
77
25

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Engineering Thermodynamics
Which of the following gas has a minimum molecular mass?

Nitrogen
Oxygen
Hydrogen
Methane

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Engineering Thermodynamics
The efficiency of the Carnot cycle may be increased by

Decreasing the highest temperature
Keeping the lowest temperature constant
Increasing the highest temperature
Increasing the lowest temperature

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Engineering Thermodynamics
When a gas is heated at constant volume

Its pressure will increase
Its temperature will increase
Neither temperature nor pressure will increase
Both temperature and pressure will increase

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