Which of the following statements are true about fuel efficiency?

Calorific value helps determine the fuel efficiency of a fuel.

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Calorific value is the amount of heat energy produced on complete combustion of 1 kg of a fuel.

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Calorific value is expressed in

k J / k g

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All of these

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Solution

The correct option is D All of these
Calorific value of a fuel helps determine fuel efficiency. It is the amount of heat that is produced when 1 kg of fuel undergoes complete combustion. The unit of measuring calorific value is $k J / k g$ .

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"A fuel has calorific value of 25,000 kJ/kg."
Which among the following options does the above statement implies to?

1 k g

(k J / k g)

On burning completely 2.5 kg of a fuel produces 87500 kJ of heat energy. The Calorific value of the fuel is –

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