In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.

Question: Yield of blast furnace gas is about __________ Nm3 /ton of pig iron.
[A].

300

[B].

2000

[C].

5000

[D].

10000

Answer: Option B

Explanation:

No answer description available for this question.

Question: Bituminous coal
[A].

ignites less easily than anthracite.

[B].

is generally coking.

[C].

burns with smoky yellow flame.

[D].

both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.