ENGINEERING THERMODYNAMICS QUIZ

Which of the following variables controls the physical properties of a perfect gas?

Pressure

Temperature

Volume

All of these

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Stirling and Ericsson cycles are

Quasi-static cycles

Semi-reversible cycles

Irreversible cycles

Reversible cycles

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The following cycle is used for air craft refrigeration

Carnot cycle

Brayton cycle

Joule cycle

Reversed Brayton cycle

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Which law states that the specific heat of a gas remains constant at all temperatures and pressures?

Joule's Law

Regnault's Law

Boyle's Law

Charles' Law

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The efficiency and work ratio of a simple gas turbine cycle are

High

Low

Very low

Very high

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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)

cv/ cp =R

cp - cv = R

cv = R/ γ-1

Both (B) and (C)

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The processes occurring in open system which permit the transfer of mass to and from the system, are known as

Adiabatic processes

Flow processes

None of the listed here

Non-flow processes

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Boyle's law i.e. pV = constant is applicable to gases under

Only small range of pressures

High range of pressures

Steady change of pressures

All ranges of pressures

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Properties of substances like pressure, temperature and density, in thermodynamic coordinates are

Cyclic functions

Point functions

Path functions

Real functions

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Second law of thermodynamics defines

Work

Heat

Internal energy

Entropy

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