This set of Bioprocess Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Treatment Processes”.
1. The physical and chemical methods are the type of which of the following treatment?
Explanation: In primary treatment, physical and chemical methods, e.g. sedimentation, coagulation etc. are included.
2. The biological method is the type of which of the following treatment?
Explanation: In secondary treatment, biological methods (e.g. activated sludge) are conducted after primary treatment.
3. Centrifugation is a type of dewatering process.
Explanation: Dewatering is the removal of water from solid material or soil by wet classification, centrifugation, filtration, or similar solid-liquid separation processes, such as removal of residual liquid from a filter cake by a filter press as part of various industrial processes.
4. What do you mean by “Stillage”?
a) Still water
b) Still waste
c) Storage and transport
d) Growth medium
Explanation: A stillage is like a pallet or skid but with a cage or sides or some form of support specifically tailored to the material it is intended to carry. Some are designed to be stackable. A stillage is any device on which a cask of ale is placed for service.
5. What is the use of comminutors?
a) To reduce the size of the particle
b) To collect waste
c) To commercialize goods and waste
d) To increase the size of the particle
Explanation: Comminute defines to reduce the size or divided into small particles (comminuted) or it can be defined as powdered or pulverized.
6. For turbidity and color removal slow sand filter is used.
Explanation: Slow sand filter are more efficient for bacterial removal and less turbidity and color removal whereas for rapid sand filter it is applicable and vice versa of slow sand filter.
7. Slow sand filter is similar to rapid sand filter in terms of coagulation.
Explanation: In terms of coagulation, slow sand filter is not required and in rapid sand filter it is required.
8. Coagulation and flocculation are different.
Explanation: Coagulation is essentially instantaneous whereas flocculation requires some more time and gentle agitation to achieve “Aggregation” of the particles.
9. Which of the following is not a coagulant?
b) Ferric chloride
c) Aluminum chloride
Explanation: Anticoagulant drugs are used to reduce the ability of the blood to clot. Examples of anticoagulants include aspirin, heparin and warfarin.
10. Polyelectrolyte solution can be viscous.
Explanation: Polyelectrolyte properties are thus similar to both electrolytes (salts) and polymers (high molecular weight compounds) and are sometimes called polysalts. Like salts, their solutions are electrically conductive. Like polymers, their solutions are often viscous.
11. What is sludge blanket?
a) Blanket of waste
b) Anaerobic digester
c) Aerobic digester
d) Simple sludge
Explanation: Upflow anaerobic sludge blanket (UASB) technology, normally referred to as UASB reactor, is a form of anaerobic digester that is used for wastewater treatment. The UASB reactor is a methanogenic (methane-producing) digester that evolved from the anaerobic clarigester.
12. What is the term “Gin”?
a) A magical spirit
Explanation: Gin is liquor which derives its predominant flavour from juniper berries (Juniperus communis). Gin is one of the broadest categories of spirits, all of various origins, styles, and flavour profiles that revolve around juniper as a common ingredient.
13. The anaerobic digester tanks volume is upto?
a) 2,000 m3
b) 12,000 m3
c) 24,000 m3
d) 200 m3
Explanation: The anaerobic digesters tanks volume is upto 12,000 m3 and equipped with heating coils for accurate temperature control normally in the mesophilic range (25o-38o, usually 28o-32o in anaerobic digestion).
14. What do you mean by ponding?
a) Level to increase water concentration
b) Water body
d) Treated effluent
Explanation: Ponding means the untreated effluent accumulating on the surface of the filter bed.
15. In alternating double filtration (ADF), the filters are reversed.
Explanation: The filters are reversed, in this way, heavy film growth is promoted the first filter to receive the effluent, but when the filter sequence is reversed it becomes nutrient limited, encouraging excess film removal.
Sanfoundry Global Education & Learning Series – Bioprocess Engineering.
To practice all areas of Bioprocess Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.