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Q1. An oil of specific gravity 0.8 is flowing upwards through a vertical pipe line, which tapers from 400 mm to 200 mm diameter. A mercury manometer is connected to the pipe line to measure the flow as shown in the figure below. The distance between the manometer is 1 m and the reading is 250 mm. By neglecting the losses between the tappings, determine

(I) the pressure between the two taped points, and
(II) the flow rate of the pipeline

Q2. Water flows through a venturi meter which contracts from D = 300 mm to d = 150 mm at the rate of 0.0037 m3/s and the differential gauge has a deflection, h of 1 m, as shown in the figure below. Specific gravity of the gauge liquid is 1.25. Determine the coefficient of discharge of the meter.

Q3.  The actual velocity in the contracted section of a jet of liquid flowing from a 50 mm orifice is 8.5 m/s under a head of 4.5 m. Determine
(i) the coefficient of velocity; and
(ii) the coefficients of contraction and discharge if the actual discharge is 11 L/s

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