Discussion
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- Question
The filter material used for air filtration system is/are
Options- A. glass wool
- B. glass fibre
- C. norite
- D. all of the above
- Correct Answer
- all of the above
- 1. The interception efficiency can be expressed as (where dp is the particle diameter and Dc cylindrical collection diameter)
Options- A. dp/Dc
- B. dp x Dc
- C. dp/Dc x 100
- D. dpDc/100 Discuss
- 2. The mechanical means of accomplishing sterilization of fermentation media/equipment is
Options- A. ultrasonic
- B. radiation
- C. chemical agents
- D. none of these Discuss
- 3. Glass fibers are favorable as a filter medium because they give a
Options- A. lower pressure drop and are less liable to wetting or combustion
- B. more pressure drop and are less liable to wetting or combustion
- C. lower pressure drop and are more liable to wetting or combustion
- D. more pressure drop and are more liable to wetting or combustion Discuss
- 4. The mechanism of air filtration in fibrous filter is
Options- A. electrostatic attraction
- B. impaction
- C. interception
- D. all of these Discuss
- 5. Analogus to the molecular diffusion, the x-directional flux of microorganisms suspended in a medium due to the axial mixing can be represented as (where Jn is flux component 'n', cn is concentration of'n')
Options- A. Jn = -dcn/dx
- B. Jn = dcn/dx
- C. Jn = -D dcn/dx
- D. Jn = D dcn/dx Discuss
- 6. The sterilization method depends
Options- A. nature of additive
- B. volume and feed rate
- C. both (a) and (b)
- D. none of these Discuss
- 7. Secondary treatment uses __________ to consume wastes.
Options- A. micro-organisms
- B. chemicals
- C. filtration
- D. none of these Discuss
- 8. 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 Discuss
- 9. Sanitizers used for rubber made equipments are
Options- A. strong acids
- B. strong alkalis
- C. combination of both
- D. none of these Discuss
- 10. BOD stands for
Options- A. biochemical oxygen demand
- B. british oxygen demand
- C. british oxygen depletion
- D. biological oxygen depletion Discuss
Sterilization problems
Search Results
Correct Answer: dp/Dc
Correct Answer: ultrasonic
Correct Answer: lower pressure drop and are less liable to wetting or combustion
Correct Answer: all of these
Correct Answer: Jn = -D dcn/dx
Correct Answer: both (a) and (b)
Correct Answer: micro-organisms
Correct Answer: influent water entering the reactor
Correct Answer: strong alkalis
Correct Answer: biochemical oxygen demand
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