Petroleum Refinery Engineering MCQs

Question 1

Pick out the correct statement.

Accepted Answer

Paraffins have lower smoke point than aromatics

Answer

Paraffins have higher octane number than corresponding iso-paraffin

Answer

Suitability of kerosene as a fuel & as an illuminant may be determined by char value test

Answer

Aviation fuel should have very high cloud point

Question 2

Higher viscosity of lubricating oil usually signifies

Accepted Answer

Higher flash point and fire point

Answer

Lower Reid vapour pressure

Answer

Higher acid number

Answer

Lower flash point and fire point

Question 3

Antioxidants are added in petrol to

Accepted Answer

Minimise the gum formation

Answer

Impart colour to it, for easy identification

Answer

Prevent icing of the carburettor

Answer

Prevent the lead build up in engines

Question 4

Sulphuric acid treatment of petroleum products removes the __________ materials.

Accepted Answer

All of the above

Answer

Gum forming

Answer

Color forming

Answer

Asphaltic

Question 5

Paraffins are desirable in lubricating oil, as it has got high

Accepted Answer

Smoke point

Answer

Viscosity

Answer

Viscosity index

Answer

Pour point

Question 6

Which of the following has the highest gum forming tendency in gosoline?

Accepted Answer

Diolefins

Answer

Paraffins

Answer

Aromatics

Answer

Naphthenes

Question 7

Specific gravity of a petroleum product gives an indication of its

Accepted Answer

Hydrocarbon content type (aromatic or paraffinic)

Answer

Degree of refinement

Answer

Ease of atomisation

Answer

Sulphur content

Question 8

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-octance is chemically known as

Accepted Answer

2-2-4 tri methyl pentane

Answer

α-methyl naphthalene

Answer

1, 3 butadiene

Answer

Tetra methyl ethylene

Question 9

Mercaptans are

Accepted Answer

All of the above

Answer

Low boiling sulphur compounds

Answer

Added in LPG cylinders to detect gas leakage by its smell

Answer

Undesirable in petrol, as they reduce its octane number