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4

A refrigeration cycle is the same as a __________ cycle,

A. Turbine

B. Heat engine

C. Reversed heat engine

D. None of these

Correct Answer :

C. Reversed heat engine


Related Questions

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4

Pick out the wrong statement.

A. The chemical potential of a pure substance depends upon the temperature and pressure

B. The chemical potential of a component in a system is directly proportional to the escaping tendency of that component

C. The chemical potential of ith species (μi) in an ideal gas mixture approaches zero as the pressure or mole fraction (xi) tends to be zero at constant temperature

D. The chemical potential of species 'i' in the mixture (μi) is mathematically represented as,μi = ∂(nG)/∂ni]T,P,nj where, n, ni and nj respectively denote the total number of moles, moles of ith species and all mole numbers except ith species. 'G' is Gibbs molar free energy

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4

1st law of thermodynamics is nothing but the law of conservation of

A. Momentum

B. Mass

C. Energy

D. None of these

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4

Which of the following non-flow reversible compression processes require maximum work?

A. Adiabatic process

B. Isothermal process

C. Isobaric process

D. All require same work

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4

Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is

A. (T2 - T1)/T2

B. (T2 - T1)/T1

C. (T1 - T2)/T2

D. (T1 - T2)/T1

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4

There is a change in __________ during the phase transition.

A. Volume

B. Pressure

C. Temperature

D. All a, b & c

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4

A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system is

A. 3

B. 4

C. 5

D. 6

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4

Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

A. Polar

B. Non-polar

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

In a homogeneous solution, the activity coefficient of a component depends upon the

A. Pressure

B. Composition

C. Temperature

D. All (A), (B) and (C)

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4

Heat of reaction at constant volume is identified with __________ change.

A. Enthalpy

B. Internal energy

C. Either (A) or (B)

D. Neither (A) nor (B)

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4

Gibbs-Helmholtz equation is

A. ΔF = ΔH + T [∂(ΔF)/∂T]P

B. ΔF = ΔH - TΔT

C. d(E - TS) T, V < 0

D. dP/dT = ΔHvap/T.ΔVvap

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4

Enthalpy of a gas depends upon its

A. Temperature

B. Mass

C. Volume

D. Pressure

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4

Pick out the correct equation relating 'F' and 'A'.

A. F = A + PV

B. F = E + A

C. F = A - TS

D. F = A + TS

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4

Rotary lime kiln is an example of a/an __________ system.

A. Closed

B. Open

C. Isolated

D. Non-thermodynamic

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4

Which one is true for a throttling process?

A. A gas may have more than one inversion temperatures

B. The inversion temperature is different for different gases

C. The inversion temperature is same for all gases

D. The inversion temperature is the temperature at which Joule-Thomson co-efficient is infinity

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4

Dry ice is

A. Moisture free ice

B. Solid helium

C. Solid carbon dioxide

D. None of these

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4

Pick out the wrong statement

A. Phase rule variables are intensive properties

B. Heat and work are both state function

C. The work done by expansion of a gas in vacuum is zero

D. CP and CV are state function

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4

For organic compounds, group contribution method can be used for the estimation of

A. Critical properties

B. Specific gravity

C. Specific volume

D. Thermal conductivity

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4

In case of a close thermodynamic system, there is __________ across the boundaries.

A. No heat and mass transfer

B. No mass transfer but heat transfer

C. Mass and energy transfer

D. None of these

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4

Which law of the thermodynamics provides basis for measuring the thermodynamic property?

A. First law

B. Zeroth law

C. Third law

D. Second law

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4

Sound waves propagation in air exemplifies an __________ process.

A. Adiabatic

B. Isothermal

C. Isometric

D. None of these

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4

In the equation, PVn = constant, if the value of n is in between 1 and y (i.e. Cp/Cv), then it represents a reversible __________ process.

A. Isometric

B. Polytropic

C. Isentropic

D. Isobaric

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4

In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.

A. 0.25

B. 0.5

C. 0.75

D. 1

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4

The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.

A. Less than

B. More than

C. Same as

D. Not related to

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4

Any substance above its critical temperature exists as

A. Saturated vapour

B. Solid

C. Gas

D. Liquid

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4

Internal energy is equal to the heat absorbed in case of a/an __________ process.

A. Constant volume

B. Polytropic

C. Adiabatic

D. Constant pressure

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4

Enthalpy changes over a constant pressure path are always zero for __________ gas.

A. Any

B. A perfect

C. An easily liquefiable

D. A real

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4

Which of the following processes cannot be made reversible even under ideal condition of operation?

A. Free expansion of a gas

B. Compression of air in a compressor

C. Expansion of steam in a turbine

D. All (A), (B) & (C)

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4

Internal energy of an ideal gas

A. Increases with increase in pressure

B. Decreases with increase in temperature

C. Is independent of temperature

D. None of these

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4

Equation which relates pressure, volume and temperature of a gas is called the

A. Equation of state

B. Gibbs Duhem equation

C. Ideal gas equation

D. None of these

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4

In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is

A. More

B. Less

C. Same

D. Unpredictable; depends on the particular reaction