QUESTION 1
a)
In a pipe of diameter 350mm and length 75m, water is flowing at a
velocity of
1
8
.
2
?
ms
find the head loss due to friction using

i)
Dorcy-Weisbach equation
ii)
Chezy’s formula for which C= 55

Assume kinematic viscosity of water as 1.2×10-6 m2/s.

(10 marks)

b)
Deviate an expression for the loss of head due to friction in pipes.
(10 marks)

1
QUESTION 2
a)
What is meant by water hammer? Deviate an expression for the rise of
pressure when the following water in a pipe is brought to rest by closing the
valve gradually.
b)
A sphere of 4cm diameter made of aluminum (sp.gv.=2.8) is attached to a
string and suspended from the roof of a wind tunnel test section. If an air
stream of 30ms-1 flows past the sphere, find the inclination of the string and
tension in the string.

(10 marks).

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