An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be________________?

Related Mcqs:

1. 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

2. Minimum work in compressor is possible when the value of adiabatic index n is equal to_________________?

   A. 0.75
   B. 1
   C. 1.27
   D. 1.35
   E. 2

3. Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________?

   A. Charles’ Law
   B. Joule’s Law
   C. Regnault’s Law
   D. Boyle’s Law
   E. there is no such law

4. If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to__________________?

   A. + v
   B. – ve
   C. zero
   D. pressure x volume
   E. any where between zero and infinity

5. An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is___________________?

   A. feasible
   B. impossible
   C. possible
   D. possible, but with lot of sophistications
   E. desirable

6. The efficiency of a Carnot engine depends on_______________________?

   A. working substance
   B. design of engine
   C. size of engine
   D. type of fuel fired
   E. temperatures of source and sink

7. 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

8. Work done in an adiabatic process between a given pair of end states depends on__________________?

   A. the end states only
   B. particular adiabatic process
   C. the value of index n
   D. the value of heattransferred
   E. mass of the system

9. 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

10. 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