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Biochemical Engineering
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Water Treatment
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Question
Sanitizer used specifically for vitreous enamel are
Options
A. strong alkalis
B. strong acids
C. weak alkali with sodium silicate
D. none of these
Correct Answer
weak alkali with sodium silicate
Water Treatment problems
Search Results
1. Which of the following substances are commonly used in a filter?
Options
A. Charcoal
B. Sand
C. Both (a) and (b)
D. Aluminum chloride
Show Answer
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Correct Answer: Both (a) and (b)
2. BOD stands for
Options
A. biochemical oxygen demand
B. british oxygen demand
C. british oxygen depletion
D. biological oxygen depletion
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Correct Answer: biochemical oxygen demand
3. Sanitizers used for rubber made equipments are
Options
A. strong acids
B. strong alkalis
C. combination of both
D. none of these
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Correct Answer: strong alkalis
4. The activated sludge process consists of returning a portion of the clarifier
Options
A. effluent water entering the reactor
B. influent water coming out of the reactor
C. influent water entering the reactor
D. effluent water coming out of the reactor
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Correct Answer: influent water entering the reactor
5. Secondary treatment uses __________ to consume wastes.
Options
A. micro-organisms
B. chemicals
C. filtration
D. none of these
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Correct Answer: micro-organisms
6. The activated sludge process is sometime referred as
Options
A. fluid bed biological oxidation system
B. fixed bed biological oxidation system
C. turning bed biological oxidation system
D. none of the above
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Correct Answer: fluid bed biological oxidation system
7. From the following sanitizers which one comes under category of surface active agents?
Options
A. Tetra phosphate
B. Teepol
C. Meta phosphate
D. None of these
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Correct Answer: Teepol
8. The ultimate source of water is
Options
A. rivers and lakes
B. dew and forest
C. rain and snow
D. underground and surface
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Correct Answer: rain and snow
9. Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated as
Options
A. insoluble carbonates
B. insoluble zeolites
C. insoluble chlorides
D. insoluble sulfates
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Correct Answer: insoluble zeolites
10. The maximum permissible limit (BIS) of turbidity in drinking water is
Options
A. 5 NTU
B. 10 NTU
C. 15 NTU
D. 20 NTU
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Correct Answer: 10 NTU
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Enzymes and Kinetics
Fermentation Kinetics
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Immobilized Enzyme
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