Answer ALL Questions
PART A – (10 x 2
= 20 Marks)
1. Define
compressibility?
2. Define
surface tension?
3. Define
specific weight and weight density?
4. What
is mean by viscosity?
5. Distinguish
between a real fluid and ideal fluid?
6. What
are the methods of dimensional analysis?
7. Define
Model and prototype?
8. What
are the types of similarities?
9.
Define continum?
10. Determine the dimensions of the
quantities given below angular velocity, angular acceleration,discharge,kinematicviscosity,force,specific
weight, dynamic viscosity?
PART
B (5x13=65 Marks)
1.
Calculate the mass density, weight density, specific volume and specific
gravity of a liquid having volume of 5cubic meters and weight of 37 KN
.Calculate the compressibility, bulk modulus of the above liquid it is
subjected to an increase in pressure of 3N/mm2 causing decrease in
volume 0.08% ?
2.
Determine the total pressure on a circular plate of dia 1.5m which is placed
vertically in water in such away that the centre of plate is 3m below the free water surface .Find the position of
centre of pressure?
3. A rectangular plane surface is 2m wide and 3
m deep. It lies in vertical plane in
water .Determine the total pressure and position of centre of pressure on the
plane surface when its upper edge is horizontal and a) coincide with water
surface b) 2.5 m below the free water surface?
4. The efficiency ŋ of
the fan depends on the density ρ the dynamic viscosity µ of the fluid ,the
angular velocity ω ,diameter D of the rotor and the discharge Q .Express ŋ in terms of
dimensional parameters?
5. Using Bacingham
theorm ,show that
the velocity through a circular orifice is given by V=
where H is the head causing flow ,D is the
diameter of the orifice
is the coefficient viscosity
is the mass density and g is the acceleration
due to gravity.
PART C (15x1=15 Marks)
1.The pressure difference
in a pipe of diameter D and length ℓ due
to turbulent flow depends on the velocityV, Viscosity
,density
and roughness k.Using Bacingham
theorm ,obtain expression for
.
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