Petrrro

Visbreaking

• Uses natural gas as feed

• Is carried out at atmospheric pressure

• Produces fuel oil of lower viscosity

• Produces gasoline only

Olefins are

• Saturated hydrocarbons

• Unsaturated cyclic compounds (hydrocarbons)

• Present in substantially good quantity in crude petroleum

• None of these

LPG stands for

• Liquid petroleum gas

• Liquefied petrol gas

• Liquid petrol gas

• Liquefied petroleum gas

Catalyst used in isomerisation process is

• H₂SO₄

• H₃PO₄

• HF

• AlCl₃

Choose the correct statement regarding thermal cracking.

• Moderate changes in operating temperature does not change the depth of cracking

• Increased residence time results in the decreased severity of cracking

• At low pressure, the yield of lighter hydrocarbons are more

• Greater depth of cracking gives lower octane number gasoline

Increase in the specific gravity of petroleum products indicates

• Decrease in paraffin content

• Increase in thermal energy per unit weight

• Increase in aromatic content

• Higher H/C ratio

Ethyl mercaptan is a/an _____ compound.

• Sulphur

• Nitrogen

• Oxygen

• None of these

Gasoline extracted from natural gas (by compression and cooling) is called the ______ gasoline.

• Polymer

• Unleaded

• Casing head

• Straight run

The most suitable solvent for deasphalting vacuum residue is

• Propane

• Methyl ethyl ketone

• Doctor's solution

• Methanol amine

A typical yield of diesel in straight-run distillation of crude oil may be about _____ percent.

• Eight

• Eighteen

• Twenty eight

• Thirty five