1) Three things that are needed for combustion are: a) oxygen, nitrogen and carbon dioxide b) fuel, oxygen and carbon dioxide c) fuel, heat and oxygen d) fuel, heat and carbon dioxide 2) The substances which have very low ignition temperature will a) catch fire easily b) will not catch fire easily. c) catch fire after sometime. d) none of these 3) Which of the following is inflammable Substances? a) petrol b) wood c) stone d) water 4) Choose the correct statement about inflammable substances from the following.They have a) low ignition temperature and cannot catch fire easily b) high ignition temperature and can catch fire easily c) low ignition temperature and can catch fire easily d) high ignition temperature and cannot catch fire easily 5) Choose the incorrect statement from the following.Forest fires are usually due to a) carelessness of humans b) heat of Sun c) cutting of trees d) lightning strike

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