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

Related Mcqs:

1. Octane number is determined by comparing the performance of the petrol with the following hydrocarbons__________________?

   A. iso-octane
   B. mixture of normal heptane and iso-oc-tane
   C. alpha methyl napthalene
   D. mixture of methane and ethane
   E. mixture of paraffins and aromatics

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. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?

   A. 250°C
   B. 500°C
   C. 1000°C
   D. 150CPC
   E. 2000°C

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

   A. Paraffin
   B. Gasoline
   C. Heavy fuel oils
   d) Patrol

   Submitted by: Faheem Zaman Dhaunroo

5. Ignition quality of diesel-fuel oil is expressed by an index called__________________?

   A. octane number
   B. cetane number
   C. calorific value
   D. carbon content
   E. ignition temperature

6. The specific gravity of diesel oil Is_________________?

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

7. The ash content in diesel oil should bot be more than_______________?

   A. 1%
   B. 5%
   C. 0.1%
   D. 0.01%
   E. 0.001%

8. 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

9. The pour point of diesel oil must be_________________?

   A. lower than the coldest atmospheric temperature at which oil is to be pumped
   B. higher than above
   C. has no such relation
   D. more than 100°C
   E. none of the above

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