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Engineering Thermodynamics

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

Joule
None of these
Boyle
Charles

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Engineering Thermodynamics
The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

pvm = C
pv = (RT)m
pv = RTm
pv = mRT

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Engineering Thermodynamics
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called

Polytropic process
Adiabatic process
Hyperbolic process
Isothermal process

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Engineering Thermodynamics
The compression ratio for petrol engines is

10 to 20
5 to 8
15 to 30
3 to 6

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Engineering Thermodynamics
The efficiency of Diesel cycle approaches to Otto cycle efficiency when

Cut-off is constant
Cut-off is increased
Cut-off is zero
Cut-off is decreased

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Engineering Thermodynamics
For which of the following substances, the internal energy and enthalpy are the functions of temperature only

Any gas
Perfect gas
Saturated steam
Water

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