Q.1

Pick out the correct statement about catalytic polymerisation.

  • H2SO4 polymerisation process gives gasoline rich in unsaturates.
  • In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive.
  • both (a) and (b)
  • neither (a) nor (b)
Q.2

Mercapsol and Unisol processes are meant for the

  • dearomatisation of kerosene
  • removal of mercaptans
  • dewaxing
  • decoloration
Q.3

Catalyst used in the isomerisation is

  • aluminium chloride
  • alumina
  • nickel
  • phosphoric acid
Q.4

Hydrogen percentage (by weight) in crude petroleum may be about

  • 5
  • 15
  • 25
  • 35
Q.5

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

  • 100
  • 200-300
  • 1000-10000
  • 10
Q.6

Choose the correct statement.

  • Coking tendency increases with increasing molecular weight.
  • Coking tendency decreases with increasing molecular weight.
  • Higher pressure enhances coke formation.
  • Coking is an exothermic reaction.
Q.7

High aniline point of diesel indicates that, it

  • is highly aromatic.
  • has a large ignition delay.
  • is highly paraffinic.
  • has a low diesel index.
Q.8

Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is

  • propane.
  • diethylene glycol.
  • aqueous solution (10% water) of diethylene glycol.
  • methyl ethyl ketone (MEK).
Q.9

Octane numbers of motor gasoline used in India and America are respectively

  • 87 & 94
  • 94 && 87
  • 94 && 100
  • 83 && 100
Q.10

Which of the following is an additive used for improving the cetane number of diesel ?

  • Tetraethyl lead
  • Tetramethyllead
  • Ethyl nitrate or acetone
  • None of these
Q.11

Boiling range of motor gasoline is an indication of the

  • case of starting
  • rate of acceleration
  • vapour locking tendency
  • all (a), (b) and (c)
Q.12

Which of the following is the most suitable feed for platforming process (reforming) ?

  • Olefinic hydrocarbon
  • Naphtha
  • Fuel oil
  • Atmospheric residue
Q.13

Tetra-ethyl lead is added in gasoline to

  • increase its smoke point.
  • reduce gum formation.
  • reduce the pour point.
  • increase its octane number.
Q.14

Aromatics are desired constituents of

  • lubricating oil
  • diesel
  • kerosene
  • petrol
Q.15

Crude topping column operates at __________ pressure.

  • atmospheric
  • 10 atm
  • vacuum
  • 3 atm.
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