If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly_________________?

Related Mcqs:

1. 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

2. Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant________________?

   A. pressure
   B. temperature
   C. volume
   D. internal energy
   E. entropy

3. Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant_______________?

   A. pressure
   B. temperature
   C. volume
   D. internal energy
   E. entropy

4. A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is__________________?

   A. justified
   B. not possible
   C. may be possible with lot of sophistications
   D. cost will be very high
   E. theroretically possible

5. For reversible adiabatic process, change in entropy is_________________?

   A. maximum
   B. minimum
   C. zero
   D. unpredictable
   E. negative.

6. Total heat of a substance is also known as __________________?

   A. internal energy
   B. entropy
   C. thermal capacity
   D. enthalpy
   E. thermal conductance

7. In order that a cycle be reversible, following must be satisfied ________________?

   A. free expansion or friction resisted expansion/compression process should not be encountered
   B. when heat is being absorbed, temperature of hot source and working sub¬stance should be same
   C. when beat is being rejected, temperature of cold source and working sub-stance should be same
   D. all of the above
   E. none of the above

8. Which of the following cycles is not a reversible cycle_____________________?

   A. Carnot
   B. Ericsson
   C. Stirling
   D. Joule
   E. none of the above

9. In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about_______________?

   A. 100 xlOO5 joules
   B. lxlO5 joules
   C. 10 xlO5 joules
   D. 10 xlO5 kilo joules
   E. 10xl04kiojoules

10. According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?

    A. Joule’s law
    B. Boyle’s law
    C. Regnault’s law
    D. Gay-Lussac law
    E. Charles’ law