Q61 of 87 Page 107

Fires in underground coalmines usually occur due to the:

fires in underground coalmines occur due to spontaneous combustion of coaldust.

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59

Which of the following undergoes spontaneous combustion?

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which of the following statement is not correct about carbondioxide acting as a fire extinguisher for electrical fires?

 62

The calorific value of a fuel is 40000KJ/kg. This fuel is most likely to be:

 63

Which of the following fuels has the highest calorific value?