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_______ is the most commonly used material for vapourizer.

(a) Steel

(b) Cast iron

(c) copper

(d) Brass

I had been asked this question in an internship interview.

My enquiry is from General Anaesthesia in chapter Anaesthesia of Clinical Science

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Correct choice is (c) copper

The best I can explain: A vapourizer is a machine that heats water and converts it into steam. This instrument is used to maintain the humidity of the room and is often used to give steam to a patient. Of all the three materials, copper has the best conductivity for heat and it helps the water heat up faster. Thus, copper coils or copper based vessel is used in a vapourizer.

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