Thermodynamics Practice Exams - Set 12 - ObjectiveBooks

# Practice Test: Question Set - 12

1. Which of the following quantities is not the property of the system?
(A) Pressure
(B) Temperature
(C) Specific volume
(D) Heat

2. The sum of internal energy (U) and the product of pressure and volume (p.v) is known as
(A) Work done
(B) Entropy
(C) Power
(D) Enthalpy

3. Which of the following gas has a minimum molecular mass?
(A) Nitrogen
(B) Hydrogen
(C) Methane
(D) Oxygen

4. According to Avogadro's law, for a given pressure and temperature, each molecule of a gas
(A) Occupies same volume
(B) Occupies volume proportional to its specific weight
(C) Occupies volume inversely proportional to its molecular weight
(D) Occupies volume inversely proportional to its specific weight

5. Mixture of ice and water form a
(A) Closed system
(B) Open system
(C) Isolated system
(D) Heterogeneous system

6. The entropy of water at 0°C is assumed to be
(A) 0
(B) -1
(C) 1
(D) 2

7. The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when
(A) Flow is uniform and steady
(B) Process is isentropic
(C) Process is isothermal
(D) Process is isentropic and specific heat does not change with temperature

8. Change in enthalpy of a system is the heat supplied at
(A) Constant pressure
(B) Constant temperature
(C) Constant volume
(D) Constant entropy

9. The term N.T.P. stands for
(A) Nominal temperature and pressure
(B) Natural temperature and pressure
(C) Normal temperature and pressure
(D) Normal thermodynamic practice

10. A heat exchange process in which the product of pressure and volume remains constant is known as
(A) Heat exchange process
(B) Throttling process
(C) Isentropic process
(D) Hyperbolic process

11. Universal gas constant is defined as equal to product of the molecular weight of the gas and
(A) Specific heat at constant pressure
(B) Specific heat at constant volume
(C) Ratio of two specific heats
(D) Gas constant

12. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
(A) Otto cycle
(B) Stirling cycle
(C) Carnot cycle
(D) Diesel cycle

13. During which of the following process does heat rejection takes place in Carnot cycle?
(A) Isothermal expansion
(B) Isentropic expansion
(C) Isothermal compression
(D) Isentropic compression

14. The value of the product of molecular weight and the gas characteristic constant for all the gases in S.I. units is
(A) 29.27 J/kmol °K
(B) 83.14 J/kmol °K
(C) 848 J/kmol °K
(D) 735 J/kmol °K

15. For which of the following substances, the internal energy and enthalpy are the functions of temperature only
(A) Any gas
(B) Saturated steam
(C) Water
(D) Perfect gas

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