Petroleum Refinery Engineering

111. In catalytic cracking process, olefins crack _________ times faster than in thermal cracking process.

1. 100
2. 200-300
3. 1000-10000
4. 10

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112. In catalytic cracking, the

1. Gasoline obtained has a very low octane number
2. Pressure & temperature is very high
3. Gasoline obtained has very high aromatic content
4. Gasoline obtained has very high amount of gum forming compounds

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113. In Hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen

1. Enhances the desulphurisation process
2. Minimises coke formation
3. Both (A) and (B)
4. Neither (A) nor (B)

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114. In petroleum refining, the process used for conversion of hydrocarbons to aromatics is

1. Catalytic cracking
2. Catalytic reforming
3. Hydrotreating
4. Alkylation

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115. In solutizer sweetening process, solutizer solution used is

1. Methanol in Unisol process
2. Naphthenic acid in Mercapsol process
3. Both (A) and (B)
4. Neither (A) nor (B)

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116. In sweetening process, solutizer agent used with caustic alkali is

1. Potassium isobutyrate
2. Sodium plumbite
3. Methanol
4. Phenol

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117. In the atmospheric pressure crude distillation, the content of _________ from lighter fraction to heavier ones.

1. Sulphur increases
2. Sulphur decreases
3. Nitrogen decreases
4. None of these

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118. Increase in the specific gravity of petroleum products indicates

1. Decrease in paraffin content
2. Increase in thermal energy per unit weight
3. Increase in aromatic content
4. Higher H/C ratio

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119. Isomerisation converts the _________ tot-paraffins.

1. Paraffins
2. Olefins
3. Naphthenes
4. None of these

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120. Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as

1. α-methyl naphthalene
2. 2-2-4 tri methyl pentane
3. 1, 3 butadiene
4. Tetra methyl ethylene

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