Concept:The energy value of a fuel is measured by the heat it releases during complete combustion.Explanation:Petrol is a combustible fuel.The energy value is determined by burning a known mass of petrol in excess oxygen inside a bomb calorimeter.The heat released raises the temperature of the surrounding water.From the temperature rise, the calorific value of the petrol is calculated.A catalytic cracker, fractionating column, and thermometer are not used to measure the energy value directly.Answer:A. Bomb calorimeter