Interview question based on skill :
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Total Questions: 20
1. Octane number is a rating of _______
Correct Answer is : petrol knocking
2. Which of the following element has 100% anti knocking?
Correct Answer is : CH3-(-CH2-)14-CH3
3. To improve anti knock of diesel _____ are added.
Correct Answer is : Pre-ignition dopes
4. What are the best anti knocking reagents of petrol?
Correct Answer is : aromatics
5. Pre-ignition of the fuel is seen in _________
Correct Answer is : petrol knocking
6. In liquid phase thermal cracking, the yield of petrol is ________
Correct Answer is : 50%-60%
7. Knocking is also called as __________
Correct Answer is : pinging
8. In the catalytic cracking, what Is the catalyst used?
Correct Answer is : Al2O3
9. Which of the following order of petrol knocking is true?
Correct Answer is : straight chain paraffins > branched paraffins > olefins > cyclo paraffins > aromatics
10. In fixed bed catalytic cracking, the catalyst is reactivated after every __________
Correct Answer is : 8-10hrs
11. In vapour phase thermal cracking, the temperature achieved is ___________
Correct Answer is : 600-650oC
12. In moving bed catalytic cracking, the catalyst is in the form of ____________
Correct Answer is : fine powder
13. The gasoline vapours are purified by __________
Correct Answer is : stabilization
14. The pressure applied in vapour phase cracking is __________
Correct Answer is : 10-20kg/cm2
15. The pressure applied in fixed-bed catalytic cracking is __________
Correct Answer is : 1.5kg/cm2
16. Removal of water is done by______
Correct Answer is : Cottrells process
17. Crude oil is in the form of_______
Correct Answer is : emulsion of oil and brine
18. To remove sulphur compounds from petroleum, it is treated with_____
Correct Answer is : copper oxide
19. The scales formed during the removal of harmful impurities can be removed by_____
Correct Answer is : dehydration
20. During refining the petroleum, in fractional distillation, what is the temperature in still?
Correct Answer is : 400oC
