WorksheetsFMHM midsem 1 exam
Total questions: 30
Worksheet time: 30mins
One litre of water occupies a volume of
100 cm3
250 cm3
500 cm3
1000 cm3
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
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
wH
wH/2
wH2/2
wH2/3
Coefficient of contraction is the ratio of
actual velocity of jet at vena contracta to the theoretical velocity
loss of head in the orifice to the head of water available at the exit of the orifice
actual discharge through an orifice to the theoretical discharge
area of jet at vena contracta to the area of orifice
According to equation of continuity,
w1a1 = w2a2
w1v1 = w2v2
a1v1 = a2v2
a1/v1 = a2/v2
In order to measure the flow with a venturimeter, it is installed in
horizontal line
inclined line with flow upwards
inclined line with flow downwards
any direction and in any location
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)
2/3Cd x b2gH
2/3Cd x b2g x H
2/3Cd x b2g x H3/2
2/3Cd x b2g x H2
Which of the following is an example of laminar flow?
Under ground flow
Flow past tiny bodies
Flow of oil in measuring instruments
all of these
The centre of gravity of the volume of the liquid displaced is called
centre of pressure
centre of buoyancy
metacentre
none of these
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 weight per unit volume of a liquid at a standard temperature and pressure is called
specific weight
mass density
specific gravity
none of these
The Bernoulli's equation is based on the assumption that
there is no loss of energy of the liquid flowing
the velocity of flow is uniform across any cross-section of the pipe
no force except gravity acts on the fluid
all of the above
The unit of dynamic viscosity in S.I. units is
N-m/s2
N-s/m2
poise
stoke
Bulk modulus of a fluid __________ as the pressure increases.
remains same
decreases
increases
none of the above
The discharge over a triangular notch is
inversely proportional to H3/2
directly proportional to H3/2
inversely proportional to H5/2
directly proportional to H5/2
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
it is easier to see through the glass tube
glass tube is cheaper than a metallic tube
it is not possible to conduct this experiment with any other tube
all of the above
The Euler's equation for the motion of liquids is based upon the assumption that
the fluid is non - viscous, homogeneous and incompressible
the velocity of flow is uniform over the section
the flow is continuous, steady and along the stream line
all of the above
The shear stress-strain graph for a newtonian fluid is a
straight line
parabolic curve
hyperbolic curve
elliptical
The length of the divergent cone in a venturimeter is __________ that of the convergent cone.
equal to
double
three to four times
five to six times
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)
w.A
wx
wAx
wA/x
One stoke is equal to
10-2 m2/s
10-3 m2/s
10-4 m2/s
10-6 m2/s
The buoyancy depends upon the
weight of the liquid displaced
pressure with which the liquid is displaced
viscosity of the liquid
compressibility of the liquid
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
path line
stream line
steak line
potential line
One poise is equal to
0.1 N-s/m2
1 N-s/m2
10 N-s/m2
100 N-s/m2
A flow whose streamline is represented by a curve, is called
one-dimensional flow
two-dimensional flow
three-dimensional flow
four-dimensional flow
The flow in a pipe or channel is said to be non-uniform when
the liquid particles at all sections have the same velocities
the liquid particles at different sections have different velocities
the quantity of liquid flowing per second is constant
each liquid particle has a definite path
A fluid whose viscosity does not change with the rate of deformation or shear strain is known as
real fluid
ideal fluid
newtonian fluid
non-newtonian fluid
The variation in the volume of a liquid with the variation of pressure is called its
surface tension
compressibility
capillarity
viscosity
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
