Chemical Engineering and Environment MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Chemical Engineering and Environment, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Chemical Engineering and Environment MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Chemical Engineering and Environment mcq questions that explore various aspects of Chemical Engineering and Environment problems. Each MCQ is crafted to challenge your understanding of Chemical Engineering and Environment principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Chemical Engineering and Environment MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Chemical Engineering and Environment. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Chemical Engineering and Environment knowledge to the test? Let's get started with our carefully curated MCQs!

Chemical Engineering and Environment MCQs | Page 16 of 31

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Q151.
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes

a.

foaming

b.

odour nuisances

c.

undesirable plant growth

d.

turbidity

Discuss
Answer: (c).undesirable plant growth
Q152.
Pick out the wrong statement.

a.

Biological oxygen demand (BOD) is a characteristic and not a constituent of water.

b.

BOD is a measure of the amount of oxygen which will be demanded & used in 5 days by the biological decomposition of the organic matter present in water stream present as food for the living organism.

c.

BOD is expressed in mg/litre (typically, BOD=2.5 mg/litre for potable water).

d.

none of these

Discuss
Answer: (d).none of these
Q153.
The pH value of potable water should be between

a.

1 to 1.5

b.

6.5 to 8

c.

13 to 14

d.

4 to 5

Discuss
Answer: (b).6.5 to 8
Q154.
Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.

a.

1

b.

7

c.

19

d.

82

Discuss
Answer: (b).7
Q155.
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).

a.

20

b.

230

c.

750

d.

1500

Discuss
Answer: (b).230
Q156.
Polyvinyl chloride containers are not suitable for storing

a.

foodstuffs

b.

woolen clothes

c.

metallic powder

d.

none of these

Discuss
Answer: (a).foodstuffs
Q157.
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.

a.

84

b.

88

c.

80

d.

92

Discuss
Answer: (a).84
Q158.
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

a.

5

b.

100

c.

1000

d.

2000

Discuss
Answer: (a).5
Q159.
Corrosion in boilers can be prevented by

a.

deaeration of feed water.

b.

enhancing pH of feed water by adding alkali.

c.

feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q160.
Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.

a.

10 to 20

b.

100 to 200

c.

1500 to 2500

d.

4000 to 5000

Discuss
Answer: (b).100 to 200
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