Environmental Engineering

Question: Color test of water is done with an instrument called
[A].

tintometer

[B].

colorimeter

[C].

electro-chemical cell

[D].

turbidimeter

Answer: Option A

Explanation:

No answer description available for this question.

Question: In water treatment, alum[Al2(SO4)3] is used for the process of
[A].

filtration

[B].

coagulation

[C].

sedimentation

[D].

disinfection

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a sedimentation tank, the detention period for water ranges from __________ hours.
[A].

2 to 4

[B].

8 to 12

[C].

16 to 20

[D].

24 to 32

Answer: Option A

Explanation:

No answer description available for this question.

Question: A standard test for determination of hardness in water is termed as __________ test.
[A].

EDTA

[B].

electometric

[C].

total count

[D].

presumptive

Answer: Option A

Explanation:

No answer description available for this question.

Question: Infective bacteria in water is killed by the __________ process.
[A].

sterilisation

[B].

aeration

[C].

disinfection

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Maximum permissible turbidity in potable water is __________ ppm.
[A].

1

[B].

10

[C].

250

[D].

1000

Answer: Option B

Explanation:

No answer description available for this question.

Question: Growth of __________ is promoted by the presence of manganese in water.
[A].

files

[B].

algae

[C].

micro-organisms

[D].

mosquitoes

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ is the process of killing organism in water.
[A].

Coagulation

[B].

Sterilisation

[C].

Disinfection

[D].

Sedimentation

Answer: Option C

Explanation:

No answer description available for this question.

Question: A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
[A].

1000 to 2000

[B].

3000 to 6000

[C].

6000 to 9000

[D].

10000 to 100000

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
[A].

Calcium

[B].

Fluorine

[C].

Phosphorous

[D].

Sulphur

Answer: Option B

Explanation:

No answer description available for this question.