An ideal regenerative cycle is ______________________?

Related Mcqs:

1. The efficiency of the ideal diesel cycle is ________ than that of Otto cycle, for the same compression ratio

   A. Higher
   B. Lower
   C. Equal
   D. None of these

   Submitted by: Faheem Zaman Dhaunroo

2. In regenerative air preheater, the heat is transferred _____________________?

   A. from a metal wall from one medium to another
   B. from heating an intermediateanaterial and then heating the air from this material
   C. by direct mixing
   D. heat is transferred by bleeding some gas from furnace
   E. none of the above

3. An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________?

   A. one adiabatic, two isobaric, and one constant volume
   B. two adiabatic and two isobaric
   C. two adiabatic, one isobaric and one constant volume
   D. one adiabatic, one isobaric and two constant volume
   E. two isobaric, two adiabatic and one constant volume

4. An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________?

   A. one adiabatic, two isobaric, and one constant volume
   B. two adiabatic and two isobaric
   C. two adiabatic, one isobaric and one constant volume,
   D. one adiabatic, one isobaric and two constant volume
   E. two isobaric, two adiabatic and one constant volume

5. The thermal efficiency of a two cycle engine as compared to four cycle engine is_________________?

   A. more
   B. less
   C. same
   D. more upto some load and then less
   E. it may be less or more depending on several other factors

6. Pick up the wrong statement about water tube boiler in comparison to fire tube boilers ______________________?

   A. former generates steam at high pressure
   B. former occupies less space for same power
   C. rate of steam flow is more in former case
   D. former is used for high installed capacity
   E. chances of explosion are less in former case

7. Which is not the correct statement about moisture in coal ______________________?

   A. inherent moisture and surface mois¬ture are different things
   B. in some coals moisture may be present upto 40%
   C. some moisture in coal helps in better burning which is not possible with completely dry coal
   D. it increases thermal efficiency
   E. moisture in coal is removed before firing by heating it with hot air

8. The feed check valve is used in order to ______________________?

   A. regulate flow of boiler water
   B. check level of water in boiler drum
   C. recirculate unwanted feed water
   D. allow high pressure feed water to flow to drum and not allow reverse flow to take place
   E. none of the above

9. Reheating of steam under ideal conditions takes place at constant __________________?

   A. entropy
   B. enthaply
   C. pressure
   D. temperature
   E. all of the above

10. Efficiency of rankine cycle can be increased by_________________?

    A. decreasing initial steam pressure and temperature
    B. increasing exhaust pressure
    C. decreasing exhaust pressure
    D. increasing the expansion ratio
    E. increasing number of regenerative heaters