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Engineering Thermodynamics

Engineering Thermodynamics
Kerosene is distilled at

65° to 220°C
470° to 550°C
220° to 345°C
345° to 470°C

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Engineering Thermodynamics
In S. I. units, the value of the universal gas constant is

8314 J/kg mole-K
831.4 J/kg mole-K
83.14 J/kg mole-K
8.314 J/kg mole-K

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

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

Perfectly elastic
Partly inelastic
Perfectly inelastic
Partly elastic

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Engineering Thermodynamics
When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency

Zero
43835
2
43834

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Engineering Thermodynamics
The polytropic index (n) is given by

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

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