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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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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.

All Topics  9594

Infective bacteria in water is killed by the _____________ process?
A Sterilisation
B Aeration
C Disinfection
D None of these
Correct Answer: Sterilisation
Hydrogen ion concentration in distilled water is___________________?
A 10-7
B 7 × 10-7
C 107
D 7 × 107
Correct Answer: 10-7
The progressive warming up of the earth’s surface is mainly due to the___________________?
A Automobile exhaust
B Blanketing effect of CO2 in the atmosphere
C De-forestation
D Thickening of ozone layer
Correct Answer: Blanketing effect of CO2 in the atmosphere
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?
A Ionosphere
B Troposphere
C Stratosphere
D None of these
Correct Answer: Troposphere
TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?
A Skin disorder
B Bronchitis
C Bone disease
D Cancer
Correct Answer: Bronchitis
The earth’s atmosphere is an envelope of gases present upto a height of about ______________ kms?
A 10
B 200
C 1000
D 2000
Correct Answer: 200
Which of the following processes is involved in the biochemical treatment of sewage effluents ?
A Oxidation
B Reduction
C Dehydration
D Fermentation
Correct Answer: Oxidation
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?
A Biological oxygen pond
B Aerated lagoons
C Trickling filters
D Gravity separator having oil skimming devices
Correct Answer: Gravity separator having oil skimming devices
Noise emitted by a ventilation fan at a distance of 3 metres is about _____________ decibels?
A 85
B 105
C 125
D 145
Correct Answer: 105
Presence of ____________ in water stream are deleterious to aquatic life?
A Soluble and toxic organics
B Suspended solids
C Heavy metals and cyanides
D All A., B. & C.
Correct Answer: All A., B. & C.
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