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Engineering Thermodynamics

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

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

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Engineering Thermodynamics
In a reversible adiabatic process, the ratio of T1/T2 is equal to

(v1/v2)γ - 1/ γ
(p1/p2)γ - 1/ γ
(v2/v1)γ - 1/ γ
(p2/p1)γ - 1/ γ

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Engineering Thermodynamics
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant

Volume
Internal energy
Pressure
Temperature

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Engineering Thermodynamics
In open cycle gas turbine plants

A condenser is used
Direct combustion systems is used
All of these
The indirect heat exchanger and cooler is avoided

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

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Engineering Thermodynamics
The temperature at which the volume of a gas becomes zero is called

None of these
Absolute temperature
Absolute zero temperature
Absolute scale of temperature

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