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Free download in PDF Petroleum Refinery Engineering General Knowledge Short Questions & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
Naphthenic acid is a/an ______________ compound?
[A]
Sulphur
[B]
Nitrogen
[C]
Oxygen
[D]
None of these
42
LPG when brought to atmospheric pressure & temperature will be a________________?
[A]
Gas heavier than air
[B]
Gas lighter than air
[C]
Liquid lighter than water
[D]
Liquid heavier than water
Answer: Gas heavier than air
43
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: Presence of sulphur
44
Smoke point of a good burning kerosene may be around _______________ mm?
[A]
0-5
[B]
20-25
[C]
60-75
[D]
100-120
45
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.
46
Which of the following has the highest flash point of all ?
[A]
Diesel
[B]
Kerosene
[C]
Petrol
[D]
Furnace oil
47
Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ?
[A]
50
[B]
70
[C]
90
[D]
140
48
Which of the following is a Naphthene ?
[A]
Butene
[B]
Butadiene
[C]
Cyclohexane
[D]
Acetylene
49
Hydrocracking employs ___________________?
[A]
High pressure & temperature
[B]
Low pressure & temperature
[C]
High pressure and low temperature
[D]
High temperature and low pressure
Answer: High pressure & temperature
50
Which is almost absent in crude petroleum ?
[A]
Olefins
[B]
Mercaptans
[C]
Naphthenes
[D]
Cycloparaffins
51
Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic____________________?
[A]
Cracking
[B]
Polymerisation
[C]
Reforming
[D]
Isomerisation
52
‘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
53
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. & B
54
Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________?
[A]
45
[B]
55
[C]
70
[D]
90
55
Molecular weight of crude petroleum may be around________________?
[A]
50
[B]
250
[C]
1500
[D]
5000
56
The characterisation factor of crude petroleum oil is around__________________?
[A]
3
[B]
11
[C]
22
[D]
28
57
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: May be either more or less than
58
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
59
Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?
[A]
Aromatics
[B]
Mercaptans
[C]
Paraffins
[D]
Naphthenic acid
60
Cetane number of alpha methyl naphthalene is assumed to be_________________?
[A]
0
[B]
100
[C]
50
[D]
∞
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