Petroleum Refinery Engineering

91. Gasoline yield in catalytic reforming of naphtha may be about _________ percent by weight.

1. 85
2. 65
3. 50
4. 98

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92. Glycol added to petrol acts as a/an _________ agent.

1. Anti-knocking
2. Anti-icing
3. Anti-gum forming
4. Dewaxing

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93. Good quality kerosene should have

1. Low smoke point
2. High smoke point
3. High aromatics content
4. Low paraffins content

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94. Gum formation in stored gasoline is mainly due to the

1. Alkylation of unsaturated
2. Presence of sulphur
3. Oxidation & polymerisation of unsaturated
4. Higher aromatic content

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95. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of

1. Aromatics
2. Paraffins
3. Olefins
4. Naphthenes

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96. High aniline point of a petrofuel (say diesel) indicates that

1. It is highly aromatic in nature
2. It is highly paraffinic in nature
3. It has a very low diesel index
4. Its ignition quality is very poor

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97. High aniline point of diesel indicates that, it

1. Is highly aromatic
2. Has a large ignition delay
3. Is highly paraffinic
4. Has a low diesel index

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98. Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of

1. Thermal cracking
2. Gum formation
3. Coking
4. Discoloration

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99. Higher pressure in the reforming reactor

1. Increases coke formation
2. Increases the rate of reaction
3. Produces high octane number gasoline
4. None of these

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100. Higher vapour pressure of gasoline indicates

1. Low flash point
2. High breathing loss
3. Both (A) and (B)
4. Neither (A) nor (B)

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