200 Best MCQs on Water Treatment- biochemical engineering
Top 200 MCQs on Water Treatment
This section contains MCQs/ Objective Type Questions of Water Treatment for various competetive Exams like HPPSC HPSSC HPSSSB and other exams
Q1). The maximum desirable limit Bureau of Indian Standards (BIS) of lead in the drinking water is
a).0.05 mg/l
b).0.09 mg/l
c).0.1 mg/l
d).1.0 mg/l
Correct Answer:
0.05 mg/l
Explaination:
Q2). Zeolite softening process removes
a).only temporary hardness of water
b).only permanent hardness of water
c).both temporary and permanent hardness of water
d).the dissolved gases in permanent hard water
Correct Answer:
both temporary and permanent hardness of water
Explaination:
Q3). Conventional tertiary treatment is
a).chemical coagulation and flocculation
b).filtration
c).sedimentation
d).none of these
Correct Answer:
chemical coagulation and flocculation
Explaination:
Q4). The maximum desirable limit (BIS) of total hardness (as CaCo3) in drinking water is
a).600 ppm
b).300 ppm
c).500 ppm
d).1000 ppm
Correct Answer:
300 ppm
Explaination:
Q5). The chemical oxygen demand (COD)measures the
a).amount of oxygen required for growth of microorganisms in water
b).amount of oxygen that would be removed from the water in order to oxidize pollution
c).amount of oxygen required to oxidize the calcium present in waste water
d).none of the above
Correct Answer:
amount of oxygen that would be removed from the water in order to oxidize pollution
Explaination:
Q6). Hardness of water does not
a).have any bad effect in boiler
b).make cooking of foods difficult
c).make it unfit for drinking
d).cause difficulty in the washing of clothes with soaps
Correct Answer:
make it unfit for drinking
Explaination:
Q7). Permanent hard water may be softened by passing it through
a).sodium silicate
b).sodium bicarbonate
c).sodium hexametaphosphate
d).sodium phosphate
Correct Answer:
sodium hexametaphosphate
Explaination:
Q8). Zeolite used in zeolite softening process for the treatment of hard water gets exhausted after certain time of usage but can be regenerated by flushing it with
a).10% calcium chloride solution
b).10% magnesium sulfate solution
c).10% magnesium chloride solution
d).10% sodium chloride solution
Correct Answer:
10% sodium chloride solution
Explaination: