For a process from state 1 to stateheat transfer in a reversible process is given by
a) Q for reversible=(To)*(S1-S2)
b) Q for reversible=(To)*(S2-S1)
c) Q for reversible=(To)/(S1-S2)
d) Q for reversible=(To)/(S2-S1)
Q.2.
For a process from state 1 to stateheat transfer in an irreversible process is given by
a) Q for irreversible=(To)*(S1-S2)
b) Q for irreversible>(To)*(S1-S2)
c) Q for irreversible<(To)*(S1-S2)
d) none of the mentioned
Q.3.
Which of the following is true?
a) Q for reversible > Q for irreversible and work for reversible < work for irreversible
b) Q for reversible < Q for irreversible and work for reversible > work for irreversible
c) Q for reversible < Q for irreversible and work for reversible < work for irreversible
d) Q for reversible > Q for irreversible and work for reversible > work for irreversible
Q.4.
Work done in all reversible processes is equal.
a) true
b) false
Q.5.
In an open system, for maximum work, the process must be entirely
a) irreversible
b) reversible
c) adiabatic
d) none of the mentioned
Q.6.
Which of the following is true for a steady flow system?
a) mass entering = mass leaving
b) mass does not enter or leave the system
c) mass entering can be more or less than the mass leaving
d) none of the mentioned
Q.7.
Which of the following is true for a closed system?
a) mass entering = mass leaving
b) mass does not enter or leave the system
c) mass entering can be more or less than the mass leaving
d) none of the mentioned
Q.8.
Which of the following is mostly neglected while doing calculations for finding maximum work?
a) KE
b) PE
c) both of the mentioned
d) none of the mentioned
Q.9.
The work done by a closed system in a reversible process is always ___ that done in an irreversible process.
a) less than or more than
b) equal to
c) less than
d) more than
Q.10.
The proof that work done in all reversible processes is same can be done by violating Kelvin-Planck statement.
a) true
b) false
Q.11.
A piston-cylinder device initially contains air atkPa and 27°C. At this state, the volume islitre. The mass of the piston is such that akPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the total heat transferred to the air.
a) 747 kJ
b) 757 kJ
c) 767 kJ
d) 777 kJ
Q.12.
A piston cylinder contains 0.5 kg of air atkPa andK. The air expands in a process so pressure is linearly decreasing with volume to a final state ofkPa andK. Find the work in the process.
a) 56.1 kJ
b) 66.1 kJ
c) 76.1 kJ
d) 86.1 kJ
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