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WorksheetsFluid Mechanics
Total questions: 20
Worksheet time: 10mins
One litre of water occupies a volume of
100 cm3
250 cm3
500 cm3
1000 cm3
The value of bulk modulus of a fluid is required to determine
Reynold's number
Froude's number
Mach number
Euler's number
In one dimensional flow, the flow
is steady and uniform
takes place in straight line
takes place in curve
takes place in one direction
The kinematic viscosity is the
ratio of absolute viscosity to the density of the liquid
ratio of density of the liquid to the absolute viscosity
product of absolute viscosity and density of the liquid
product of absolute viscosity and mass of the liquid
The pressure less than atmospheric pressure is known as
suction pressure
vacuum pressure
negative gauge pressure
all of these
The total energy line lies over the hydraulic gradient line by an amount equal to the
pressure head
velocity head
pressure head + velocity head
pressure head - velocity head
If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in
neutral equilibrium
stable equilibrium
unstable equilibrium
none of these
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)
w x Q x H
w x Q x hf
w x Q (H - hf)
w x Q (H + hf)
According to Archimede's principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.
equal to
less than
more than
unpredictable
The component of the total force exerted by fluid on a body in the direction parallel to the direction of motion is called as
lift
drag
both a. and b.
none of the above
The fluid will rise in capillary when the capillary is placed in fluid, if
the adhesion force between molecules of fluid and tube is less than the cohesion between liquid molecules
the adhesion force between molecules of fluid and tube is more than the cohesion between liquid molecules
the adhesion force between molecules of fluid and tube is equal to the cohesion between liquid molecules
None of the above
What is an ideal fluid?
A fluid which has no viscosity
A fluid which is incompressible
A fluid which has no surface tension
All of the above
The hydraulic mean depth or the hydraulic radius is the ratio of
area of flow and wetted perimeter
wetted perimeter and diameter of pipe
velocity of flow and area of flow
none of these
When a body is placed over a liquid, it will float if
gravitational force is equal to the upthrust of the liquid
gravitational force is less than the upthrust of the liquid
gravitational force is more than the upthrust of the liquid
none of the above
The discharge through a channel of trapezoidal section is maximum when
width of channel at the top is equal to twice the width at the bottom
depth of channel is equal to the width at the bottom
the sloping side is equal to half the width at the top
the sloping side is equal to the width at the bottom
The tangential velocity of the water element having a free vortex is
directly proportional to its distance from the centre
inversely proportional to its distance from the centre
directly proportional to its (distance)2 from the centre
inversely proportional to its (distance)2 from the centre
A venturiflume is used to measure
pressure of liquid
discharge of liquid
pressure difference between two points in a channel
pressure difference between two points in a pipe
The metacentric height is the distance between the
centre of gravity of the floating body and the centre of buoyancy
centre of gravity of the floating body and the metacentre
metacentre and centre of buoyancy
original centre of buoyancy and new centre of buoyancy
The coefficient of discharge for an external mouthpiece depends upon
velocity of liquid
pressure of liquid
area of mouthpiece
length of mouthpiece
Select the wrong statement
An equivalent pipe is treated as an ordinary pipe for all calculations
The length of an equivalent pipe is equal to that of a compound pipe
The discharge through an equivalent pipe is equal to that of a compound pipe
The diameter of an equivalent pipe is equal to that of a compound pipe
