Question is ⇒ Secondary treatment uses __________ to consume wastes., Options are ⇒ (A) micro-organisms, (B) chemicals, (C) filtration, (D) none of these, (E) , Leave your comments or Download question paper.

Question is ⇒ Secondary treatment uses __________ to consume wastes., Options are ⇒ (A) micro-organisms, (B) chemicals, (C) filtration, (D) none of these, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Secondary treatment uses __________ to consume wastes.
A.	micro-organisms [Correct Answer]
B.	chemicals [Wrong Answer]
C.	filtration [Wrong Answer]
D.	none of these [Wrong Answer]
View Answer 8 -15 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Application of quaternary ammonium compounds as sanitizing agents tends to
favor gram positive bacteria
decrease gram positive bacteria
increase the percentage of gram(-)ve rods on utensils
none of the above

⇒ Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?
Chlorination
Treating with potassium permagnate
UV radiation
Treating with bleaching powder

⇒ According to BIS the maximum permissible limit of dissolved solids in drinking water is
1000 mg/l
500 mg/l
2000 mg/l
1500 mg/l

⇒ Lagoons may be characterized as
anaerobic
facultative
aerated
all of these

⇒ The methods used for biological treatment are
lagoon
activated sludge process
oxidation ditches
all of these

⇒ Permanent hard water may be softened by passing it through
sodium silicate
sodium bicarbonate
sodium hexametaphosphate
sodium phosphate

⇒ Inhibitors are used along with sanitizer to
improve their action
to prevent corrosion
both (a) and (b)
none of these

⇒ The maximum desirable limit Bureau of Indian Standards (BIS) of lead in the drinking water is
0.05 mg/l
0.09 mg/l
0.1 mg/l
1.0 mg/l

⇒ Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated as
insoluble carbonates
insoluble zeolites
insoluble chlorides
insoluble sulfates

⇒ Which of the following chemical is sometime added in the process of coagulation and flocculation?
Aluminum sulphate
Aluminum oxide
Calcium chloride
None of these

⇒ BOD stands for
biochemical oxygen demand
british oxygen demand
british oxygen depletion
biological oxygen depletion

⇒ The common methods used for disinfection in waste water treatment plants are
chlorination
UV light
both (a) and (b)
Phenolic solvent

⇒ Sanitizer used specifically for vitreous enamel are
strong alkalis
strong acids
weak alkali with sodium silicate
none of these

⇒ Coliform bacteria in water is an indication of the presence of
radioactive wastes
excess fertilizer
decaying animals and plants
human feces

⇒ The water being used in dairy industry should contain not more than
5 proteolytic and/or lipolytic organisms per ml
10 proteolytic and/or lipolytic organisms per ml
15 proteolytic and/or lipolytic organisms per ml
20 proteolytic and/or lipolytic organisms/ml

⇒ Permanent hardness of water is caused by the presence of
bicarbonates of calcium and magnesium
carbonates of sodium and potassium
chlorides and sulfates of calcium and magnesium
phosphates of sodium and potassium

⇒ Temporary hardness of water may be removed by adding
calcium hydroxide
calcium carbonate
calcium chloride
sodium bicarbonate

⇒ The maximum permissible limit (BIS) of turbidity in drinking water is
5 NTU
10 NTU
15 NTU
20 NTU

⇒ Sanitizers used for rubber made equipments are
strong acids
strong alkalis
combination of both
none of these

⇒ When temporary hard water is boiled, one of the substances formed is
calcium bicarbonate
calcium sulfate
hydrogen chloride
carbon dioxide

⇒ The chemical oxygen demand (COD)measures the
amount of oxygen required for growth of microorganisms in water
amount of oxygen that would be removed from the water in order to oxidize pollution
amount of oxygen required to oxidize the calcium present in waste water
none of the above

⇒ The activated sludge process is sometime referred as
fluid bed biological oxidation system
fixed bed biological oxidation system
turning bed biological oxidation system
none of the above

⇒ Sedimentation is a physical process used in wastewater treatment to
remove particles that are less dense than water
remove particles that are more dense than water
remove the pertinacious material from the water
none of the above

⇒ 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
10% calcium chloride solution
10% magnesium sulfate solution
10% magnesium chloride solution
10% sodium chloride solution

⇒ Hardness of water does not
have any bad effect in boiler
make cooking of foods difficult
make it unfit for drinking
cause difficulty in the washing of clothes with soaps

⇒ Conventional tertiary treatment is
chemical coagulation and flocculation
filtration
sedimentation
none of these

⇒ Biological oxidation processes usually referred as biological treatment, are the most common form of
primary treatment
secondary treatment
tertiary treatment
all of these

⇒ From the following sanitizers which one comes under category of surface active agents?
Tetra phosphate
Teepol
Meta phosphate
None of these

⇒ Which of the following substances are commonly used in a filter?
Charcoal
Sand
Both (a) and (b)
Aluminum chloride

⇒ Acid used mostly for removal of milk stone is
phosphoric acid
nitric acid
gluconic acid
tartaric acid