Petroleum Refinery Engineering
Which of the following is the most widely used cracking process in oil refineries?

T.C.C. moving bed process
Houdry's fixed bed process
Dubbs process
Fluidised bed catalytic cracking process

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Petroleum Refinery Engineering
Mercaptans are

Added in LPG cylinders to detect gas leakage by its smell
All of these
Low boiling sulphur compounds
Undesirable in petrol, as they reduce its octane number

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