Q794
The lowest temperature at which the fine dry coal dust can be ignited and can cause the flame to travel through out the dust air mixture is . . . . . . . .
A.
500°C - 600°C
B.
600°C - 400°C
C.
700°C - 800°C
AnswerD.
900°C - 1000°C
Answer: Option C
Solution
Answer: Option C
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