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Engineering Thermodynamics

Engineering Thermodynamics
According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.

None of these
Decreases
Remains constant
Increases

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Engineering Thermodynamics
To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is

Multiplied by its density
Multiplied by its molecular weight
Divided by its molecular weight
Multiplied by its specific weight

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Engineering Thermodynamics
The general law for the expansion or compression of gases, is

pvn = C
pvγ = C
pv = C
pv = m R T

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Engineering Thermodynamics
Otto cycle consists of following four processes

Two isentropic, one constant volume and one constant pressure
Two isentropic and two constant pressures
Two isothermal and two isentropic
Two isentropic and two constant volumes

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Engineering Thermodynamics
The polytropic index (n) is given by

log (p2/ p1)/log (v1/ v2)
log [(p1v1)/(p2v2)]
log (p1p2)/log (v1v2)
log (v1/ v2)/ log (p1/p2)

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Engineering Thermodynamics
No liquid can exist as liquid at

Zero pressure
Centre of earth
Vacuum
273°K

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