200 Best MCQs on downstream processing- biochemical engineering
Q17). In antibiotic manufacturing processes, the fermentation time ranges from
a).2-3 weeks
b).1-2 weeks
c).4-5 weeks
d).2-4 weeks
Correct Answer:
4-5 weeks
Explaination:
Q18). The conventional filtration involves the separation of large particles generally
a).dp>5μm
b).dp>10μm
c).dp>15μm
d).dp>20μm
Correct Answer:
dp>10μm
Explaination:
Q19). Which of the operation does not come under upstream processing?
a).Media preparation
b).Inoculum development
c).Effluent treatment
d).Storage of raw material
Correct Answer:
Effluent treatment
Explaination:
Q20). For cost analysis in a fermentor system, the depreciation cost varies from
a).5-6% of the capital cost
b).6-7% of the capital cost
c).6-10% of the capital cost
d).8-10% of the capital cost
Correct Answer:
6-10% of the capital cost
Explaination:
Q21). Micro filtration refers to the separation of suspended material such as bacteria by using a membrane with spore sizes of
a).0.02 to 10μm
b).1-10A°
c).20-30μm
d).10-200A°
Correct Answer:
0.02 to 10μm
Explaination:
Q22). Start up expenses in a fermentation industry varies from
a).0-5% of the capital cost
b).10-15% of the capital cost
c).5-10% of the capital cost
d).15-20% of the capital cost
Correct Answer:
5-10% of the capital cost
Explaination:
Q23). Which of the following is considered as a pretreatment to the biological feeds?
a).Heating to denature the proteins
b).Addition of filter aids to increase the porosity
c).Addition of electrolytes
d).All of the above
Correct Answer:
All of the above
Explaination:
Q24). For the extractions operation, the selectivity should be
a).> 1
b).< 1
c).1
d).zero
Correct Answer:
> 1
Explaination: