Petroleum Refinery Engineering Mcqs for Chemical - Set 3

1)   True vapour pressure of a petroleum fraction ________________ Reid vapour pressure?

a. Is less than
b. Is more than
c. Is same as
d. May be either more or less than
Answer  Explanation 

ANSWER: May be either more or less than

Explanation:
No explanation is available for this question!


2)   The characterisation factor of crude petroleum oil is around__________________?

a. 3
b. 11
c. 22
d. 28
Answer  Explanation 

ANSWER: 11

Explanation:
No explanation is available for this question!


3)   Molecular weight of crude petroleum may be around________________?

a. 50
b. 250
c. 1500
d. 5000
Answer  Explanation 

ANSWER: 1500

Explanation:
No explanation is available for this question!


4)   Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________?

a. 45
b. 55
c. 70
d. 90
Answer  Explanation 

ANSWER: 70

Explanation:
No explanation is available for this question!


5)   Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its_________________?

a. Molecular weight
b. Aromatics content
c. Both A. & B.
d. Neither ‘a’ nor ‘b’
Answer  Explanation 

ANSWER: Both A. & B.

Explanation:
No explanation is available for this question!


6)   ‘Solvent naphtha’ used mostly as a solvent in paints and perfumery is produced by the _________________ of virgin naphtha into small boiling range cuts?

a. Steam reforming
b. Distillation
c. Desulphurisation
d. None of these
Answer  Explanation 

ANSWER: Distillation

Explanation:
No explanation is available for this question!


7)   Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic____________________?

a. Cracking
b. Polymerisation
c. Reforming
d. Isomerisation
Answer  Explanation 

ANSWER: Reforming

Explanation:
No explanation is available for this question!


8)   Which is almost absent in crude petroleum ?

a. Olefins
b. Mercaptans
c. Naphthenes
d. Cycloparaffins
Answer  Explanation 

ANSWER: Mercaptans

Explanation:
No explanation is available for this question!


9)   Hydrocracking employs ___________________?

a. High pressure & temperature
b. Low pressure & temperature
c. High pressure and low temperature
d. High temperature and low pressure
Answer  Explanation 

ANSWER: High pressure & temperature

Explanation:
No explanation is available for this question!


10)   Which of the following is a Naphthene ?

a. Butene
b. Butadiene
c. Cyclohexane
d. Acetylene
Answer  Explanation 

ANSWER: Cyclohexane

Explanation:
No explanation is available for this question!


11)   Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ?

a. 50
b. 70
c. 90
d. 140
Answer  Explanation 

ANSWER: 90

Explanation:
No explanation is available for this question!


12)   Which of the following has the highest flash point of all ?

a. Diesel
b. Kerosene
c. Petrol
d. Furnace oil
Answer  Explanation 

ANSWER: Furnace oil

Explanation:
No explanation is available for this question!


13)   Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl isobutyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the____________________?

a. Elimination of solvent drying facility
b. Higher nitration temperature
c. Lower solvent dilution ratio
d. All A., B. & C.
Answer  Explanation 

ANSWER: All A., B. & C.

Explanation:
No explanation is available for this question!


14)   Smoke point of a good burning kerosene may be around _______________ mm?

a. 0-5
b. 20-25
c. 60-75
d. 100-120
Answer  Explanation 

ANSWER: 20-25

Explanation:
No explanation is available for this question!


15)   Gum formation in stored gasoline is mainly due to the ____________________?

a. Alkylation of unsaturated
b. Presence of sulphur
c. Oxidation & polymerisation of unsaturated
d. Higher aromatic content
Answer  Explanation 

ANSWER: Presence of sulphur

Explanation:
No explanation is available for this question!


16)   LPG when brought to atmospheric pressure & temperature will be a________________?

a. Liquid lighter than water
b. Liquid heavier than water
c. Gas lighter than air
d. Gas heavier than air
Answer  Explanation 

ANSWER: Gas heavier than air

Explanation:
No explanation is available for this question!


17)   Naphthenic acid is a/an ______________ compound?

a. Sulphur
b. Nitrogen
c. Oxygen
d. None of these
Answer  Explanation 

ANSWER: Oxygen

Explanation:
No explanation is available for this question!


18)   Flash point of diesel/kerosene (>50°C) is determined by the_______________?

a. Abel apparatus
b. Pensky-Martens apparatus
c. Saybolt chromometer
d. None of these
Answer  Explanation 

ANSWER: Abel apparatus

Explanation:
No explanation is available for this question!


19)   Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?

a. Aromatics
b. Mercaptans
c. Paraffins
d. Naphthenic acid
Answer  Explanation 

ANSWER: Aromatics

Explanation:
No explanation is available for this question!


20)   Cetane number of alpha methyl naphthalene is assumed to be_________________?

a. 0
b. 100
c. 50
d.
Answer  Explanation 

ANSWER: 0

Explanation:
No explanation is available for this question!