Which of the following are used in diesel engines and oil fired boilers :

Related Mcqs:

1. Diesel engines as compared to petrol engines require ______________________?

   A. bigger flywheel
   B. smaller flywheel
   C. same size flywheel
   D. no flywheel
   E. flywheel whose size may be less or more depending on several other fac-tors

2. High carbon content in diesel oil used for diesel engine leads to_________________?

   A. production of highly corrosive gases corroding the cylinder walls and exhaust system
   B. excessive engine wear
   C. damaging of both the storage tank and the engine
   D. deposition on engine parts
   E. none of the above.

3. Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________?

   A. (1- moisture content)
   B. (1 + moisture content)
   C. 1 + moisture content
   D. 1 – moisture content

4. Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?

   A. not true
   B. true at full load
   C. true at part load
   D. true at both part and full load
   E. there could not be any such criterion

5. The knocking in diesel engines for given fuel, will be__________________?

   A. enhanced by increasing compression ratio
   B. enhanced by decreasing compression ratio
   C. unaflected by compression ratio
   D. first enhanced by increasig compression ratio upto a limit beyond which it will be suppressed
   E. dependent on other factors

6. The ignition coil in diesel engines produces voltage of the order of________________?

   A. 6 to 12 volts
   B. 240 volts
   C. 1000 volts
   D. 20,000 volts
   E. 80,000 volts

7. Cetane number is determined by comparing the performance of diesel oil with the following hydrocarbons___________________?

   A. cetane
   B. mixture of cetane and alphamethyl napthalene
   C. ethylene dibromide
   D. mixture of aldehydes and ketones
   E. mixture of cetane with tetra-ethyl lead

8. The specific gravity of diesel oil Is_________________?

   A. 1
   B. 0.7
   C. 0.85
   D. 0.5
   E. 1.25

9. The ratio of useful power; engine friction exhaust gas losses; cooling water, air and oil losses for a diesel engine is of the order of____________________?

   A. 5:25:30:50
   B. 25:35:5:35
   C. 25:5:10:60
   D. 40:30:15:15
   E. 25:5:35:35

10. If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?

    A. give lot of smoke
    B. detonate
    C. knock
    D. not run
    E. run for some time and then stop