Petroleum Refinery Engineering
Which of the following gasolines (unleaded) has the least octane number?

Catalytically reformed gasoline
Straight run gasoline
Polymer gasoline
Catalytically cracked gasoline

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Petroleum Refinery Engineering
Pick out the correct statement pertaining to catalytic cracking.

Percentage conversion increases with increase in the catalyst to oil ratio
With increase in the reactor pressure, octane number of gasoline decreases
With increase in the reactor temperature, gasoline yield decreases for a given conversion
All of these

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