Chemical Engineering - Petroleum Refinery Engineering

36. 

LSHS is a type of furnace oil, which

A. is more viscous than high viscosity furnace oil (HVFO).
B. stands for low sulphur heavy stock.
C. is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%).
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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37. 

Hydrofining is the most recent and effective method for the

A. removal of sulphur.
B. improvement of smoke point.
C. reduction of breathing loss.
D. improvement of viscosity index.

Answer: Option A

Explanation:

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38. 

Isomerisation converts the __________ tot-paraffins.

A. paraffins
B. olefins
C. naphthenes
D. none of these

Answer: Option A

Explanation:

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39. 

Straight run petrol as compared to methyl/ethyl alcohol has

A. lower calorific value.
B. lower octane number.
C. higher specific gravity.
D. higher ignition temperature.

Answer: Option B

Explanation:

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40. 

Crude oil is subjected to vacuum distillation in the last stage, because

A. high boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose.
B. lighter/low boiling products are prone to thermal decomposition.
C. high purity products can be obtained thereby.
D. none of these.

Answer: Option A

Explanation:

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