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Petroleum Refinery Engineering MCQ Questions & Answers | Chemical Engineering

Learn Petroleum Refinery Engineering MCQ questions & answers are available for a Chemical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Petroleum Refinery Engineering MCQ question is the important chapter for a Chemical Engineering and GATE students. Page-5 section-2

Each section contains 100 MCQs on Petroleum Refinery Engineering .
41
A multigrade lubricating oil means an oil having high
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Answer & Solution
Answer: Option A
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42
Reid vapour pressure of gasoline is the measure of its
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Answer & Solution
Answer: Option C
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43
Which of the following has maximum hydrogen/carbon ratio (by weight)?
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Answer & Solution
Answer: Option A
Solution:
Hydrogen to carbon (H/C) ratio is higher for lighter hydrocarbon fractions and decreases as the molecular weight increases.

Naphtha is a lighter petroleum fraction composed of smaller hydrocarbon molecules, so it has a higher hydrogen content relative to carbon.

Gasoline is slightly heavier than naphtha and therefore has a lower H/C ratio compared to naphtha.

Diesel contains longer hydrocarbon chains, resulting in a further reduced hydrogen to carbon ratio.

Fuel oil is the heaviest among the options with large, complex molecules and thus has the lowest H/C ratio.

Hence, naphtha has the maximum hydrogen/carbon ratio among the given options.
44
Waxy crudes are treated with chemical additives mainly to
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Answer & Solution
Answer: Option A
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45
Catalyst used in catalytic polymerisation which produces polymer gasoline is
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Answer & Solution
Answer: Option C
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46
Diesel used in naval applications has a minimum cetane number of
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Answer & Solution
Answer: Option C
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47
Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency?
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Answer & Solution
Answer: Option A
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48
Which of the following has the lowest cetane number?
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Answer & Solution
Answer: Option A
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49
Catalyst used in the catalytic polymerisation is
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Answer & Solution
Answer: Option A
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50
Which parameter is used for the grading of paraffin waxes?
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Answer & Solution
Answer: Option B
Solution:
The grading of paraffin waxes is primarily based on their melting point.

The melting point is a critical parameter because it determines the temperature at which the wax transitions from a solid to a liquid state.

Different applications require paraffin waxes with specific melting points to ensure proper performance.

Therefore, Option B: Melting point is the correct answer.