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Engineering Thermodynamics

Engineering Thermodynamics
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)

v2/v1
(v1 + v2)/v2
(v1 + v2)/v1
v1/v2

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Engineering Thermodynamics
The heat and mechanical energies are mutually convertible. This statement was established by

Boyle
Joule
Charles
None of these

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Engineering Thermodynamics
The hard coke is obtained when carbonization of coal is carried out at

700° to 900°C
500° to 700°C
300° to 500°C
900° to 1100°C

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Engineering Thermodynamics
An adiabatic process is one in which

All of these
No heat enters or leaves the gas
The change in internal energy is equal to the mechanical work done
The temperature of the gas changes

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Engineering Thermodynamics
The isothermal and adiabatic processes are regarded as

None of the listed here
Reversible or irreversible process
Reversible process
Irreversible process

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Engineering Thermodynamics
The unit of pressure in S.I. units is

Pascal
Dyne per square cm
mm of water column
kg/cm²

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