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24. Classify heat exchangers. With the help of a neat sketch, explain a double pipe heat exchanger.

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25. Explain the principle of temperature measurement using thermocouple?

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26. The Bhopal disaster was a gas leak incident in India, considered as the worst ever disaster". What

were the circumstances that lead to the disaster? As a chemical engineering student, list the possible

safety measures they could have been adopted to prevent the damage?