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C192020 Pages:3

PART B

Answer any two full questions, each carries 15 marks.
An orifice meter with orifice diameter 15 cm is inserted in a pipe of 30 cm
diameter. The pressure gauges fitted upstream and downstream of the orifice
meter give readings of 14.715*104 N/m? and 9.81*10* N/m? respectively. Find
the rate of flow of water through the pipe. Take Ca =0.6
State and prove Bernoulli’s equation, mentioning the assumptions underlying it.
What is kinetic energy correction factor ?
A bend in horizontal pipeline conveying water gradually reduces from 0.6 m to
0.3 m diameter and deflects the flow through angle of 60°. At the larger end the
gauge pressure is 171.65 kN/m?. Determine the magnitude and direction of the
force exerted on the bend, (i) when there is no flow, (ii) when the flow is 876
1/5.
What is a Cipoletti weir. Show how the effect of end contraction is
compensated in a Cippoletti weir
A tank is in the form of a hemisphere of 3m diameter and having a cylindrical
upper part of 3 m diameter and 5 m height. Find the time required to empty it
through an orifice of 50 mm diameter at its bottom if the tank is initially full of
water. Take Ca=0.62.
Water flows over a rectangular weir 2 m wide at a depth of 200 mm and
afterwards passes through a triangular right angled weir. Taking Ca for the
rectangular and triangular weir as 0.61 and 0.58 respectively, find the depth
over the triangular weir.

PART ட

Answer any two full questions, each carries20 marks.
Derive the Hagen-Poiseulle equation for laminar flow in circular pipes.
Determine the rate of flow of water through a pipe of diameter 20 cm and
length 50 m when one end of the pipe is connected to a tank and other end of
the pipe is open to the atmosphere. The pipe is horizontal and the height of
water in the tank is 4 m above the centre of the pipe. Consider all losses and
take f=0.036
Define Hydraulic Gradient Line and Total Energy Line

A plate of 600 mm length and 400 mm wide is immersed in a fluid of specific

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