Question : The temperature of boiling water in a steam engine may be high because:
Option 1: there are dissolved substances in water
Option 2: there is low pressure inside the boiler
Option 3: there is high pressure inside the boiler
Option 4: the fire is at very high temperature
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Correct Answer: there is high pressure inside the boiler
Solution : The correct option is there is high pressure inside the boiler.
Due to the high pressure inside the boiler in a steam engine, boiling water has a high temperature. High pressure allows water to reach higher temperatures before boiling. The engine's turbines or pistons are then propelled by this high-temperature, high-pressure steam, which produces mechanical work or electricity.
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