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Engineering Thermodynamics

Engineering Thermodynamics
The entropy __________ in an irreversible cyclic process.

None of these
Decreases
Remains constant
Increases

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Engineering Thermodynamics
The unit of energy is S. I. units is

Joule/meter (J/m)
Joule (J)
Joule meter (Jm)
Watt (W)

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Engineering Thermodynamics
If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

Enthalpy
Volume
Temperature
Pressure

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Engineering Thermodynamics
In a no flow reversible process for which p = (-3V + 15) × 105 N/m², V changes from 1 m3 to 2 m3. The work done will be about

10 × 10⁵ joules
100 × 10⁵ joules
1 × 10⁵ joules
10 × 10⁵ kilo joules

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Engineering Thermodynamics
During throttling process

No work is done by expanding steam
There is no change of internal energy of steam
Heat exchange does not take place
All of these

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Engineering Thermodynamics
When gas is heated at constant pressure, the heat supplied is utilized in

Increasing the internal energy of gas and also for doing some external work
Increasing the internal energy of gas
Doing some external work
None of these

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