11. The hyperbolic process is governed by
A. Boyle’s law
B. Charles’ law
C. Gay-Lussac law
D. Avogadro’s law
12. A closed system is one in which heat and work crosses the boundary of the system but the mass of the working substance does not crosses the boundary of the system.
A. Yes
B. No
13. The entropy of water at 0°C is assumed to be
A. 1
B. 0
C. -1
D. 10
14. The greater the pressure difference in throttling, the lesser is the irreversibility.
A. Yes
B. No
15. During which of the following process does heat rejection takes place in the Carnot cycle?
A. Isothermal expansion
B. Isentropic expansion
C. Isothermal compression
D. Isentropic compression
16. Which is the incorrect statement about the Carnot cycle?
A. It is used as the alternate standard of comparison of all heat engines.
B. All the heat engines are based on the Carnot cycle.
C. It provides the concept of maximizing work output between the two temperature limits.
D. all of the above
17. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law of thermodynamics
D. Kelvin Planck’s law
18. The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents
A. heat absorbed
B. heat rejected
C. either (a) or (b)
D. none of these
19. The free expansion process is a constant enthalpy process.
A. Correct
B. Incorrect
20. The specific heat at constant volume is
A. the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
B. the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
C. the amount of heat required to raise the temperature of 1 kg of water through one degree
D. any one of the above