Water Treatment

Question: Conventional tertiary treatment is
[A].

chemical coagulation and flocculation

[B].

filtration

[C].

sedimentation

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: The methods used for biological treatment are
[A].

lagoon

[B].

activated sludge process

[C].

oxidation ditches

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Biological oxidation processes usually referred as biological treatment, are the most common form of
[A].

primary treatment

[B].

secondary treatment

[C].

tertiary treatment

[D].

all of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: BOD stands for
[A].

biochemical oxygen demand

[B].

british oxygen demand

[C].

british oxygen depletion

[D].

biological oxygen depletion

Answer: Option A

Explanation:

No answer description available for this question.

Question: Application of quaternary ammonium compounds as sanitizing agents tends to
[A].

favor gram positive bacteria

[B].

decrease gram positive bacteria

[C].

increase the percentage of gram(-)ve rods on utensils

[D].

none of the above

Answer: Option C

Explanation:

No answer description available for this question.

Question: Inhibitors are used along with sanitizer to
[A].

improve their action

[B].

to prevent corrosion

[C].

both (a) and (b)

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Sanitizer used specifically for vitreous enamel are
[A].

strong alkalis

[B].

strong acids

[C].

weak alkali with sodium silicate

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Sanitizers used for rubber made equipments are
[A].

strong acids

[B].

strong alkalis

[C].

combination of both

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Acid used mostly for removal of milk stone is
[A].

phosphoric acid

[B].

nitric acid

[C].

gluconic acid

[D].

tartaric acid

Answer: Option B

Explanation:

No answer description available for this question.

Question: From the following sanitizers which one comes under category of surface active agents?
[A].

Tetra phosphate

[B].

Teepol

[C].

Meta phosphate

[D].

None of these

Answer: Option B

Explanation:

No answer description available for this question.