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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

Smog is ______________________?

A Nothing but black smoke

B A combination of smoke and fog

C A liquid particle resulting from vapor condensation

D A solid particle e.g. fly-ash

Review Detailed Answer

Correct Answer: A combination of smoke and fog

Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

A < 1

B 10-100

C 100-200

D 100-1000

Review Detailed Answer

Correct Answer: < 1

For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?

A 10000

B 5

C 500

D 1000

Review Detailed Answer

Correct Answer: 5

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?

A CO

B SO2

C NOx

D CFC (chloro fluoro carbons)

Review Detailed Answer

Correct Answer: CO

The term Biological Oxygen Demand (BOD) is used in relation to ______________________?

A Potable water

B Cooling water

C Distilled water

D Industrial effluents

Review Detailed Answer

Correct Answer: Industrial effluents

The upper layer of atmosphere is called the ____________________?

A Stratosphere

B Troposphere

C Ionosphere

D None of these

Review Detailed Answer

Correct Answer: Stratosphere

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

A 102

B 105

C 109

D 1015

Review Detailed Answer

Correct Answer: 105

The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

A 20

B 230

C 750

D 1500

Review Detailed Answer

Correct Answer: 230

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

A 105

B 135

C 160

D 185

Review Detailed Answer

Correct Answer: 135

Disinfection of water is done to remove ______________________?

A Color

B Bad taste

C Foul odour

D Bacteria

Review Detailed Answer

Correct Answer: Bacteria

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Smog is ______________________?

Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?

The term Biological Oxygen Demand (BOD) is used in relation to ______________________?

The upper layer of atmosphere is called the ____________________?

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

Disinfection of water is done to remove ______________________?