Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.

Question: Yield of pitch from distillation of high temperature tar is around __________ percent.
[A].

10

[B].

25

[C].

65

[D].

90

Answer: Option C

Explanation:

No answer description available for this question.

Question: Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if
[A].

it contains large amount of volatile matter.

[B].

it is stored in tall heaps.

[C].

smaller fines are stored in large quantity.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.