City Guilds Model Questions Vol1 2021 Engineering Question 45
Practice objective / multiple choice question 45 from the 2021 City Guilds Model Questions Vol1 Engineering examination.
A workshop chemical storage cabinet holds 5 L of ethanol (density \(0.789\ \text{g/cm}^3\)) and 3 L of acetone (density \(0.784\ \text{g/cm}^3\)). The heat of combustion is \(29.7\ \text{MJ/kg}\) for ethanol and \(31.0\ \text{MJ/kg}\) for acetone. Safety regulations limit the total fire load of a storage area to \(150\ \text{MJ}\). Determine whether the cabinet exceeds this limit, and if it does, calculate the minimum volume of ethanol (in litres, to two decimal places) that must be removed to bring the fire load within the limit, assuming the amount of acetone remains unchanged.
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About This Question
This is City Guilds Model Questions Vol1 2021 Engineering Question 45. It is one of the objective questions from the 2021 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Medium .
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