Page 2 :
B. Fill in the blanks., , 1. A blue flame on a burner shows dhldknkalkde, , zone., d.fucls., , 3. Hottest part of a candle flame is its, , 4. Mined coal and petroleum are, , combustion., , 2. A yellow ftame on a burnershows-daNAaABafaCllE, , 5. JadsageM. has the highest calorific value, , combustion., , arhong'the fuels., , State whether 'true' or 'false:, , C., , 1. An iron nail is a combustible substance.F, 2, , Oxygen is essential for combustion. T, , 3. Minimum temperature at which a substance, , 4. Water and carbon dioxide are fire extinguishersT, , 6., , Yellow flame from a gas burner shows, complete burning of the fuel., , Fossil fuels, , are an, , Fire, , extinguishers should be provided, , at, , all, , public places., that catches flame., 8. It is the vapour form of fuel, , 9. Temperature at which, , catches fire is its calorific value., , 3., , 7., , a, , T, , fuel catches fire is, , calledits ignition temperature., on, 10. Amount of heat energy produced, is called, combustion of a unit fuel, , complete, its calorific value.", , inexhaustible natural, , resource of fuel. f, D. Give, , one, , word, , answers., , burning of a substance.muShn, , 1., , Process of, , 2, , A material, , 3., , A material which does, , catches fire, 4. A fuel like petrol which, Ropll(onlb, , instantaneously, ignited (catches fire).abasldle, , which gets, , not, , getignitedro, , even, , from, , A n equipment (apparatu_), , a, , spark., , used for, , putting, , out fires. fingyaht., , Theoretical Questions, questions., A. Short a n s w e r type, 1., , Define the, (a), , following, , 7., , terms:, , quotingexamples, , Combustion, , 8., , (c), , of, , a, , fuel, , 2., , value of, What is calorific, , 3., , What do you, , understand, , 4., 5., , Is, , a, , fuel?, , 9., , by ignition, 10., , possible, , without, , of oxygen?, 6., , What, , are, , of, the requisites, , property of, , the, , supply, , each of the, , helps in controling, , following, , fire:, , (b) carbon dioxide, , fuels and gaseous, List the solid fuels, liquid, fuels you know about., , Which, , (a), , combustion?, , combustion, , one, , (a) water, , temperature'?, , What is, , Give, , which, , (b) Ignition temperature, Calorific value, , of combustions, Name the different types, , zone, , of, , a, , candle flame, , Maximum illumination, , gives?, , (light), , (b) Maximum heat, , (c), , Vaporisation of, , fuel, , combustion?, , 95, , Combustion and Flame