The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called__________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. 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

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

   A. increase
   B. decrease
   C. be independent
   D. may increase or decrease depending on other factors
   E. none of the above

7. In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?

   A. 0.85
   B. 1
   C. 1.1 to 1.3
   D. 1.2 to 1.5

8. The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?

   A. lean mixture
   B. chemically correct mixture
   C. rich mixture
   D. unpredictable
   E. none of the above

9. Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

   A. Lean mixture
   B. Chemically correct fuel air ratio
   C. Rich mixture
   D. Unpredictable

10. The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?

    A. lean mixture
    B. chemically correct mixture
    C. rich mixture
    D. unpredictable
    E. none of the above