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__________________?

Related Mcqs:

1. 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________________?

   A. 650°K
   B. 600°K
   C. 625°K
   D. 700°K
   E. 750°K

2. If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle___________________?

   A. more
   B. less
   C. equal
   D. depends on other factors
   E. none of the above

3. Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits ?

   A. 02, N2, steam, C02
   B. Oz, N2, water vapour
   C. S02, NH3, C02, moisture
   D. 02, N2, H2, air
   E. steam vapours, H2, C02

4. 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

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

   A. temperature
   B. enthalpy
   C. internal energy
   D. entropy
   E. all of the above

6. The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that___________________?

   A. carnot cycle can’t work with saturated steam
   B. heat is supplied to water at temperature below the maximum temperature of the cycle
   C. a rankine cycle receives heat at two places
   D. rankine cycle is hypothetical
   E. none of the above

7. 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

8. 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

9. 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

10. The unit of time in S.I. units is__________________?

    A. second
    B. minute
    C. hour
    D. day
    E. year.