501. In an isothermal process, the internal energy________________?
A. increases
B. decreases
C. remains constant
D. first increases and then decreases
E. first decreases and then increases

502. First law of thermodynamics furnishes the relationship between______________________?
A. heat and work
B. heat, work and properties of the system
C. various properties of the system
D. various thermodynamic processes
E. heat and internal energy

503. According to first law of thermodynamics__________________?
A. work done by a system is equal to heat transferred by the system
B. total internal energy of a system during a process remains constant
C. internal energy, enthalpy and entropy during a process remain constant
D. total energy of a system remains constant
E. entropy of a system remains constant

504. For reversible adiabatic process, change in entropy is_________________?
A. maximum
B. minimum
C. zero
D. unpredictable
E. negative.

505. The more effective way of increasing efficiency of Carnot engine is to____________________?
A. increase higher temperature
B. decrease higher temperature
C. increase lower temperature
D. decrease lower temperature
E. keep lower temperature constant

506. Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be ____________________?
A. 4.17m3/kgmol
B. 400 m3/kg mol
C. 0.15 m3/kg mol
D. 41.7 m3/kg mol
E. 417m3/kgmol

507. For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
A. zero
B. minimum
D. maximum
D. infinity
E. there is no such criterion

508. Which of the following processes is irreversible process___________________?
A. isothermal
B. adiabatic
C. throttling
D. all of the above
E. none of the above

509. If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?
A. free expansion
B. hyperbolic expansion
C. adiabatic expansion
D. parabolic expansion
E. throttling

510. If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________?
A. free expansion
B. hyperbolic expansion
C. adiabatic expansion
D. parabolic expansion
E. throttling

NOTE
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