Petroleum Refinery Engineering MCQs

Question 1

Pick out the wrong statement.

Accepted Answer

The most ideal feedstock for thermal reforming is dearomatised kerosene

Answer

Lower boiling paraffins have higher octane number than higher paraffins

Answer

Dehydrogenation of naphthenes to aromatics is a desirable reaction in reforming process

Answer

Catalyst used in catalytic reforming is platinum on silica-alumina base

Question 2

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

Accepted Answer

Tetraethyl lead

Answer

Tetramethyllead

Answer

Ethyl nitrate or acetone

Answer

None of these

Question 3

Platforming is a __________ process.

Accepted Answer

Non-regenerative & fixed bed

Answer

Moving bed

Answer

Fluidised bed

Answer

Regenerative

Question 4

Octane number of gasoline is a measure of its

Accepted Answer

Resistance to knock

Answer

Ignition delay

Answer

Ignition temperature

Answer

Smoke point

Question 5

Choose the correct statement regarding thermal cracking.

Accepted Answer

Greater depth of cracking gives lower octane number gasoline

Answer

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

Answer

Increased residence time results in the decreased severity of cracking

Answer

At low pressure, the yield of lighter hydrocarbons are more

Question 6

High aniline point of a petrofuel (say diesel) indicates that

Accepted Answer

It is highly paraffinic in nature

Answer

It is highly aromatic in nature

Answer

It has a very low diesel index

Answer

Its ignition quality is very poor

Question 7

__________ determination is not a very significant and important test for gasoline.

Accepted Answer

Viscosity

Answer

Gum & sulphur content

Answer

Octane number

Answer

Reid vapor pressure

Question 8

Cracking is

Accepted Answer

An endothermic reaction

Answer

An exothermic reaction

Answer

Favoured at very low temperature

Answer

None of these

Question 9

Pyrolysis of kerosene or natural gasoline is done to produce mainly the

Accepted Answer

Olefins and aromatics

Answer

Lighter paraffins

Answer

Stabilised gasoline

Answer

Diesel