Chemical Engineering MCQs

6108 MCQs  (Page 603 of 611)

Attempt Chemical Engineering Quiz
Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?
A. Carbonates
B. Bi-carbonates
C. Iron & manganese
D. Arsenic
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The concentration of water vapour in troposphere, which depends upon the altitude & temperature, varies in the range of zero to ______________ percent?
A. 1
B. 4
C. 8
D. 12
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Turbidity of water is an indication of the presence of__________________?
A. Suspended inorganic matter
B. Dissolved solids
C. Floating solids
D. Dissolved gases
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‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?
A. Dust & mists
B. Smoke & fumes
C. Photochemical smog & soot
D. None of these
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During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
A. Idle running
B. Acceleration
C. Cruising
D. Deceleration
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Carbon monoxide is a pollutant, which causes_________________?
A. Respiratory disease (e.g. asthma)
B. Asphyxiation (suffocation) leading to death
C. Retardation in crop growth
D. Damage to building materials like marble
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In water treatment, alum [Al2(SO4)3] is used for the process of __________________?
A. Filtration
B. Coagulation
C. Sedimentation
D. Disinfection
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Which of the following is not a secondary air pollutant ?
A. Ozone
B. Photochemical smog
C. Sulphur dioxide
D. All a., b. & c.
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Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?
A. 25
B. 50
C. 80
D. 120
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Which of the following dust collection equipments is the least efficient (for sub-micronic particles) ?
A. Dust catcher (gravity type)
B. Cyclone separator
C. Bag filter
D. Hollow wet scrubber
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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