Engineering Questions with Answers - Multiple Choice Questions
Chemical Process Technology MCQ’s – Natural Products – Petroleum – 1
1 - Question
Which of the following series comprises the largest fraction of petroleum crude?
a) n-paraffin series
b) Naphthene series
c) Asphalts
d) Isoparaffin series
View Answer
Explanation: n-paraffin series comprises the largest fraction of petroleum crude; second abundant series in crude is Naphthene series followed by others. Naphthene series are saturated.
2 - Question
Asphaltenes are soluble in paraffin’s.
a) True
b) False
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Explanation: The statement is false as Asphaltenes are soluble in aromatics. They are brownish black solids chemically composed of carbon, hydrogen along with sulfur, oxygen, and nitrogen.
3 - Question
What is the relationship between octane number and power number?
a) Octanenumber=powernumber+1003−100
b) Octanenumber=powernumber−1003∗100
c) Octanenumber=powernumber−1003+100
d) Octanenumber=powernumber+1003+100
View Answer
Answer: c
Explanation: Octanenumber=powernumber−1003+100 is the relationship between octane number and power number. Power extracted from the system is the basis for power number.
4 - Question
__________________ causes knocking.
a) Low expansion
b) Low compression
c) High expansion
d) High compression
View Answer
Explanation: High compression is the cause of knocking effect. Some anti-knocking agents are used such as lead tetra methyl, lead tetra ethyl and so on which slow down the burning rate and hence reduce the knocking effect.
5 - Question
Which of the following is not an intermediate distillate product in petroleum refining?
a) Heavy fuel oils
b) Diesel oils
c) Lubricating oil
d) Gas oil
View Answer
Explanation: Petroleum refining products constitute light ends, light heating oil’s, intermediate distillates, heavy distillates, Residues, and also by-products. Diesel oils, Heavy fuel oils, Gas oil are the intermediate distillates where Lubricating oil is a heavy distillate.
6 - Question
Residue formed in the petroleum refining is ______________
a) Waxes
b) Asphalt
c) Ammonia
d) Gas oil
View Answer
Explanation: Residues formed during petroleum refining are lubricants, fuel oil, petrolatum, asphalt, road oil, greases, and petroleum coke. Waxes are heavy distillates, ammonia is a byproduct, and gas oil is an intermediate distillate.
7 - Question
Which of the following is not produced as heavy distillate in petroleum refinery process?
a) Waxes
b) Frothing oil
c) Lubricating oil
d) Petroleum coke
View Answer
Explanation: Floating and frothing oil, mineral oil, waxes, and lubricating oil are the heavy distillates produced in petroleum refinery process where petroleum coke is a residue.
8 - Question
Which residue of petroleum refinery process is used as electrodes?
a) Petroleum coke
b) Ammonia
c) Wax
d) Fuel oil
View Answer
Explanation: Petroleum coke, one of the residues of petroleum refinery process is used in electrodes and also used for aluminium plants. Fuel oil is a residue, Wax is a heavy distillate, and Ammonia is a by-product.
9 - Question
Which of the following is a by-product of petroleum refining process?
a) Fuel oil
b) Diesel oil
c) Ammonia
d) Lubricating oil
View Answer
Explanation: Ammonia, detergents, sulfur and its derivatives are the byproducts produced in the petroleum refinery process. There are different types of refineries to refine petroleum.
10 - Question
Which of the following unit operation is based on relative solubility in different solvents?
a) Extraction
b) Adsorption
c) Distillation
d) Crystallization
View Answer
Explanation: Extraction is a separation technique used to separate mixture basing on relative solubility in different solvents. This technique is mostly used in lube oil manufacture.