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Engineering Thermodynamics

Engineering Thermodynamics
The compression ratio for Diesel engines is

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

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Engineering Thermodynamics
Water contained in a beaker can be made to boil by passing steam through it

Not possible
At a pressure greater than atmospheric pressure
At atmospheric pressure
Any pressure

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Engineering Thermodynamics
The unit of universal gas constant is

None of these

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Engineering Thermodynamics
The heating of a gas at constant pressure is governed by

Gay-Lussac law
Boyle's law
Charles' law
Avogadro's law

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Engineering Thermodynamics
The efficiency of the Carnot cycle may be increased by

Decreasing the highest temperature
Increasing the lowest temperature
Keeping the lowest temperature constant
Increasing the highest temperature

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Engineering Thermodynamics
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

Both (B) and (C)
cv = R/ γ-1
cp - cv = R
cv/ cp =R

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