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The drum situated in recording type makes one rotation for how many hours?

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in Energy Engineering by (91.0k points)
The drum situated in recording type makes one rotation for how many hours?

(a) 4 hours

(b) 24 hours

(c) 6 hours

(d) 12 hours

This question was posed to me in an internship interview.

Origin of the question is Rainfall and its Measurement topic in chapter Hydro Electric Power Plant of Energy Engineering

1 Answer

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Best answer
The correct choice is (b) 24 hours

To elaborate: The rotating drum is kept rotating continuously with the help of electric motor. The drum makes generally one rotation during 24 hours. On the rotating drum the graph paper is placed throughout its rotation the recording is made.

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