An egg shaped section of sewer________________?

Question: Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
[A].

asphyxiation (suffocation).

[B].

shortness of breath.

[C].

tuberculosis.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of
[A].

CO2

[B].

SO2

[C].

hydrocarbons

[D].

CFC (chloro fluoro carbon)

Answer: Option D

Explanation:

No answer description available for this question.

Question: In water chemical treatment plant, use of chloramines ensures
[A].

disinfection.

[B].

taste & odour control.

[C].

weed control in reservoirs.

[D].

removal of permanent hardness.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Hydrogen ion concentration in distilled water is
[A].

10-7

[B].

7 x 10-7

[C].

107

[D].

7 x 107

Answer: Option A

Explanation:

No answer description available for this question.

Question: For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
[A].

10000

[B].

5

[C].

500

[D].

1000

Answer: Option B

Explanation:

No answer description available for this question.