What is the correct defination of FUEL?, Substances that prdouce only light energy on burning., Substances that undergo combustion to produce heat energy, along with light., Which of the following is the standard unit used to represent the calorific value of a fuel?, kJ/kg (Kilojoule per kilogram), KJ (kilojoules), Kg/Kj (kilograms per kilojoules, "Till date, no fuel-burning device is known to exhibit 100% efficiency"- Is the given statement true or false?, TRUE, FALSE, Pertoleum gas, natural gas, biogas are example of :-, Solid fuels, Gaseous fuels, Liquid fuels, Which of the follwing statements are true?, The lower calorific value of a fuel, the more heat it produces when burned., The higher calorific value of a fuel, the less heat it produces when burned., The lower the calorific value the less heat it produces when burned., The higher the calorific value of a fuel, the more heat it produces when burned., What are the correct uses of fuels:-, Only for running vehicles like cars and trains, For cooking food, running vehicles, and generating electricity., Only for lighting candles and lamps., For building roads and houses., Some commonly used fuels are:-, Water, oxygen, and nitrogen, Carbon dioxide, helium, and argon, Wood, coal, LPG, and petrol, Iron, gold, and copper, Why is LPG considered a better household fuel than wood?, It takes much longer to catch fire than wood., It has a much lower calorific value than wood., It burns cleanly without leaving ash or producing smoke., Why can't we use a fuel that has an ignition temperature lower than room temperature?, It will produce a very cold flame., It will catch fire on its own at room temperature, making it very dangerous to store., It will never catch fire, even with a spark., It will release too much carbon dioxide before it even burns., What are the three most important qualities of an ideal, highly efficient, and eco-friendly fuel?, Low calorific value, extremely high ignition temperature, and cheap to buy., Burns instantly at room temperature, produces only light, and does not produce heat.Burns instantly at room temperature, produces only light, and does not produce heat., Solid physical state, leaves lots of ash behind, and produces plenty of smoke., High calorific value, moderate ignition temperature, and low pollution.

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