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Engineering Thermodynamics

Engineering Thermodynamics
For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

Greater than
None of these
Equal to
Less than

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Engineering Thermodynamics
The efficiency of Diesel cycle increases with

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

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

Dry steam
Saturated steam
Wet steam
Superheated steam

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Engineering Thermodynamics
The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will

Increase
Increase/decrease depending on application
Remain unchanged
Decrease

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Engineering Thermodynamics
The general law for the expansion or compression of gases, is

pv = C
pv = m R T
pvγ = C
pvn = C

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Engineering Thermodynamics
The compression ratio is the ratio of

Swept volume to clearance volume
Swept volume to total volume
Total volume to clearance volume
Total volume to swept volume

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