Petroleum Refinery Engineering MCQs

Question 1

The main use of heavy gas oil produced by the vacuum distillation unit is as a

Accepted Answer

Feedstock for fluid catalytic cracking unit

Answer

Blending component for kerosene

Answer

Blending component for petrol

Answer

None of these

Question 2

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

Accepted Answer

87 & 94

Answer

94 & 87

Answer

94 & 100

Answer

83 & 100

Question 3

Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke?

Accepted Answer

Vacuum residue

Answer

Naphtha

Answer

Light gas oil

Answer

Diesel

Question 4

Sweetening of petroleum product means the removal of

Accepted Answer

Sulphur & its compounds

Answer

Water

Answer

Organic impurities

Answer

Wax

Question 5

Highest quality bitumen is produced from the __________ crude oil.

Accepted Answer

Naphthenic

Answer

Paraffinic

Answer

Intermediate

Answer

Mixed

Question 6

1 centistoke is equal to __________ Redwood I seconds.

Accepted Answer

4.08

Answer

1

Answer

0.408

Answer

40.8

Question 7

Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm 2 .

Accepted Answer

3

Answer

1.5

Answer

6

Answer

12

Question 8

Paraffin base crude oil as compared to asphalt base crude gives

Accepted Answer

Higher yield of straight run gasoline

Answer

Higher octane number gasoline

Answer

Lower viscosity index lube oil

Answer

Poorer yield of lube oil

Question 9

Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.

Accepted Answer

Smoking tendency of paraffins increases with decrease in its molecular weight

Answer

Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics

Answer

Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond

Answer

Smoking tendency of aromatics decreases with increase in its molecular weight