Engineering Questions with Answers - Multiple Choice Questions
Separation Processes MCQ’s – Industrial Chemical Processes
1 - Question
Which manner is a chemical or biochemical plant not operated in?
a) Continuous
b) Batch-wise
c) Semi-continuous
d) Discontinuous
View Answer
Explanation: If a chemical plant is operated in a discontinuous manner, time will be illogically wasted.
2 - Question
When is a separation process not required in a manufacturing process?
a) When there is a decomposition reaction
b) When there is a complete conversion
c) When the byproducts are in form of gases
d) When the reaction is reversible
View Answer
Explanation: If there is a complete conversion of reactants to products, there will be no need for separation since no reactants are left.
3 - Question
If only 5% of Ethylene is converted to Ethylene glycol, why is there a need of separation process?
a) To feed more reactant to the reacting mixture
b) To remove the ethylene glycol formed
c) To recover the unreacted Ethylene Glycol
d) To start an intermediate reaction
View Answer
Explanation: If the unreacted reactant is reused the cost of the manufacturing in turn shall be reduced since there will be less requirement for feeding new reactant and near complete conversion could be achieved.
4 - Question
Will the above reaction require a separation process?
a) Yes
b) No
View Answer
Explanation: The above reaction will not require a separation process since there is a complete conversion of reactants to product.
5 - Question
How is the Diethyl Ether removed in the manufacturing of ethanol from ethylene?
a) Directly removed
b) Crude distillation column
c) Low pressure flash drum
d) Light-ends tower
View Answer
Explanation: Diethyl ether is removed using a light ends tower easily.
6 - Question
Chemical reactions require feed mixtures from non-renewable resources like coal, petroleum. What is used in place of non-renewable sources?
a) Sunlight
b) Biomass
c) Biodiesel
d) Microorganisms
View Answer
Explanation: Many of the products given by coal, petroleum are given by biomass too and it is less polluting.
7 - Question
Which of the following is a condition of operation for biochemical plant?
a) Metallic catalyst
b) Chemical catalyst
c) Elevated temperature
d) Non-pathologic state of the organism
View Answer
Explanation: If any condition is used in a biochemical plant then there are chances of the organisms dying.So a nn-pathological state is preferred.
8 - Question
In a biochemical plant, what do the physiological conditions vary with?
a) The reaction
b) State of the products
c) The micro-organism
d) The ambient conditions
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Explanation: The physiological condition has to be dependent on the micro-organism because micro-organism activity can be maximsed at certain conditions only.
9 - Question
How can be citric acid produced other than from lemons?
a) Aerobic fermentation of starch
b) Anaerobic fermentation of starch
c) Aerobic fermentation of glucose
d) Anaerobic fermentation of glucose
View Answer
Explanation: The aerobic fermentation gives a considerate amount of citric acid required in various chemical and biochemical reactions.
10 - Question
Which of the following separation techniques is NOT used in the process of manufacturing of citric acid ?
a) Ultrafiltration
b) Ion-exchange
c) Crystallization
d) Distillation
View Answer
Explanation: Distillation is not required in the manufacturing of itric acid since there are no two products forming which are needed to be separated having difference in boiling points.
11 - Question
What separation technique is used when a separation operation is accompanied by chemical reaction that facilitates separation?
a) Distillation
b) Fractional distillation
c) Reactive distillation
d) Fractional crystallization
View Answer
Explanation: Reactive distillation is best employed in such conditions when the separation process is accompanied by chemical reaction like absorption of SO2 by limestone slurry.
12 - Question
Which of the following machines do not require a chemical separation technique?
a) The washing machine
b) Refrigerator
c) Coffee machine
d) Water cooler
View Answer
Explanation: The coffee machine leaches oil from the coffee beans leaving behind the ingredients responsible for acidity and bitterness
13 - Question
Which of the following is NOT an importance of separation process?
a) Reduces the operating cost
b) Reduces the risk of explosion
c) Reduces the probability of side reactions
d) Increases the speed of the reaction
View Answer
Explanation: Separation process cannot accelerate a chemical reaction unless the byproduct is hindering the formation of product. Normally, a catalyst is used to accelerate a reaction.
14 - Question
Which of the following is NOT used to represent a chemical process?
a) Block flow diagram
b) Process-flow diagram
c) Flow chart
View Answer
Explanation: A flow chart is used to represent a computer program and not a chemical reaction per se.