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Engineering Thermodynamics

Engineering Thermodynamics
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be

Zero
Minimum
Infinity
Maximum

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Engineering Thermodynamics
The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.

Two-third
One-third
One-half
Three-forth

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Engineering Thermodynamics
The efficiency of Diesel cycle depends upon

Pressure ratio
Cut-off ratio and compression ratio
Compression ratio
Temperature limits

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Engineering Thermodynamics
The reading of the pressure gauge fitted on a vessel is 25 bar. The atmospheric pressure is 1.03 bar and the value of 'g' is 9.81 m/s2. The absolute pressure in the vessel is

34.81 bar
26.03 bar
23.97 bar
25 bar

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Engineering Thermodynamics
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

δQ = T/ds
dQ = ds/T
δQ = T.ds
None of the listed here

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Engineering Thermodynamics
The unit of universal gas constant is

None of these

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