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Engineering Thermodynamics

Engineering Thermodynamics
For reversible adiabatic process, change in entropy is

Minimum
Zero
Maximum
Negative

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Engineering Thermodynamics
A cycle consisting of two isothermal and two isentropic processes, is known as

Ericsson cycle
Carnot cycle
Joule cycle
Stirling cycle

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Engineering Thermodynamics
For a perfect gas, according to Boyle’s law (where P = Absolute pressure, V = Volume and T = Absolute temperature)

P/T = constant, if v is kept constant
V/T = constant, if p is kept constant
P v = constant, if T is kept constant
T/P = constant, if v is kept constant

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Engineering Thermodynamics
Carnot cycle efficiency is maximum when

Final temperature is 0°C
Initial temperature is 0°K
Final temperature is 0°K
Difference between initial and final temperature is 0°K

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Engineering Thermodynamics
The efficiency of Diesel cycle with decrease in cut-off

Decreases
First decreases and then increases
Increases
First increases and then decreases

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

Equal to
None of these
Less than
Greater than

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MORE MCQ ON Engineering Thermodynamics

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