A capillary tube viscometer similar to that shown in Fig 2.7 is being used to measure the...

A capillary tube viscometer similar to that shown in Fig 2.7 is being used to measure the viscosity of an oil having a specific gravity of 0.90. The following data apply:

Tube inside diameter = 2.5 mm = D

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Length between manometer taps = 300 mm = L

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Manometer fluid = mercury

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Manometer deflection = 177 mm = h

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Velocity of flow = 1.58 m/s = v

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Determine the viscosity of the oil.

FIGURE 2.7 Capillary-tube viscometer.