The thermal efficiecny of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will___________________?

Related Mcqs:

1. The thermal efficiency of a semi-diesel cycle having fixed compression ratio and fixed quantity of heat, with increase in pressure ratio will_______________?

   A. increase
   B. decrease
   C. remain unaffected
   D. increase/decrease depending upon engine capacity
   E. first increase and then decrease

2. The m.e.p. of a diesel cycle having fixed compression ratio with increase in cut-off will_________________?

   A. increase
   B. decreae
   C. be unaffected
   D. depend on other factors
   E. unpredictable

3. The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is__________________?

   A. same
   B. less
   C. more
   D. more or less depending on power rating
   E. unpredictable

4. 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

5. In diesel engine, the compression ratio in comparison to expansion ratio is_______________?

   A. same
   B. less
   C. more
   D. variable
   E. more/less depending on engine capacity.

6. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be________________?

   A. 2%
   B. 4%
   C. 8%
   D. 14%
   E. 27%.

7. In petrol engine using a fixed octane rating fuel and fixed compression ratio, super charging will_________________?

   A. increase the knocking tendency
   B. decrease the knocking tendency
   C. not affect the knocking tendency
   D. increase or decrease knocking tendency depending on strength and time of spark
   E. unpredictable

8. Installation of supercharger on a four-cycle diesel engine can result in the following percentage increase in power_____________?

   A. upto 25%
   B. upto 35%
   C. upto 50%
   D. upto 75%
   E. upto 100%.

9. Hot air standard diesel cycle efficiency with increase in value of C„_______________?

   A. increases
   B. decreases
   C. remains unaffected
   D. depends on other factors
   E. unpredictable

10. 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