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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following is an irreversible cycle?

Ericsson
Stirling
None of these
Carnot

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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)

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

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Engineering Thermodynamics
Kinetic theory of gases assumes that the collisions between the molecules are

Perfectly elastic
Partly elastic
Partly inelastic
Perfectly inelastic

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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)

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

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Engineering Thermodynamics
If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly

Entropy
Enthalpy
Internal energy
Temperature

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Engineering Thermodynamics
No liquid can exist as liquid at

Zero pressure
Vacuum
273°K
Centre of earth

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