Mechanical Engineering Thermodynamics - Set 05 - ObjectiveBooks

# Practice Test: Question Set - 05

1. Which of the following is the property of a system?
(A) Pressure and temperature
(B) Volume and density
(C) Enthalpy and entropy
(D) All of the above

2. On weight basis, air contains following parts of oxygen
(A) 21
(B) 23
(C) 25
(D) 73

3. Which of the following is not the intensive property?
(A) Pressure
(B) Temperature
(C) Density
(D) Heat

4. Which of the following items is not a path function?
(A) Heat
(B) Work
(C) Kinetic energy
(D) Thermal conductivity

5. Work done in an adiabatic process between a given pair of end states depends on
(A) The end states only
(C) The value of index ‘n
(D) The value of heat transferred

6. Heat and work are
(A) Point functions
(B) System properties
(C) Path functions
(D) Intensive properties

7. Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure
(A) Enthalpy
(B) Volume
(C) Mass
(D) Entropy

8. According to Kelvin-Planck’s statement of second law of thermodynamics,
(A) It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
(B) It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
(C) It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
(D) None of the above

(A) The product of the gas constant and the molecular mass of an ideal gas is constant
(B) The sum of partial pressure of the mixture of two gases is sum of the two
(C) Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
(D) All of the above

10. The value of n = 1 in the polytropic process indicates it to be
(A) Reversible process
(B) Isothermal process
(D) Irreversible process

11. Which of the following is the lightest and most volatile liquid fuel?
(A) Gasoline
(B) Kerosene
(C) Fuel oil
(D) None of these

12. A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
(B) Isothermal process
(C) Hyperbolic process
(D) Polytropic process

13. A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is
(A) 54°C
(B) 327°C
(C) 108°C
(D) 654°C

14. If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant
(A) Volume
(B) Pressure
(C) Temperature
(D) Enthalpy

15. The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as
(A) Law of equipartition of energy
(B) Law of degradation of energy
(C) Law of conservation of energy
(D) None of these

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