+1 vote
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Why is large reservoir used in single column manometer?

(a) In order to enhance the change in level of liquid in reservoir

(b) In order to negate the effects of change in level due to pressure variation

(c) In order to reduce the effect due to dynamic pressure variation due to motion

(d) None of the mentioned

This question was posed to me during an interview.

My query is from Measurement of Pressure, Simple and Differential Manometers in division Pressure and Its Measurement of Fluid Mechanics

1 Answer

+2 votes
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Best answer
The correct choice is (b) In order to negate the effects of change in level due to pressure variation

For explanation I would say: Single column manometer directly gives the pressure by measuring the height in the other limb and due to large cross sectional area of the reservoir, for any variation in pressure, the change can be neglected.

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