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Physiological Modeling
Make–Up Exam
1.
The dilateral viscosity is helpful in describing about--a) Sound absorption in polyatomic gasses
b) Fluid dynamics of liquids containing gas bubbles
c) Velocity of flow.
d) a & b
e) None of the above
2.
The velocity distribution for laminar, incompressible flow of a Newtonian fluid in a long tube is
a) Parabolic
b) Linear
c) Nonlinear
d) circular
e) None of the above
3.
Which of the following change in unsteady flow?
a) Only pressure
b) Only density
c) Only velocity
d) Pressure, density and velocity
e) None of the above
4.
From the equation of change for kinetic energy the term ρ (v.g) signifies.
a)
b)
c)
d)
e)
5.
The following are characteristics of Newtonian fluids
a)
b)
c)
d)
e)
6.
only stress tensor is symmetric
only molecular weight of liquids and gases are less than 5000
a&b
complex fluids
None of the above
Which of the quantities can be derived by obtaining velocity profiles?
a)
b)
c)
d)
e)
7.
rate of work done by pressure of surroundings
rate of work done by external force
rate of work done by viscous force
All of the above
none of the above
maximum velocity
average velocity
shear stress
all of the above
None of the above
In the laminar flow we observe that it is
a) time–dependent
b) flow pattern is complex
c) fluid layer move smoothly over one another in direction of flow
d) a & c
e) None of the above
8.
For creeping flow around the sphere, the stokes law (Fk = 6πµRV∞) is equal to
a)
b)
c)
d)
e)
form drag
friction drag
kinetic force
sum of all above terms
none of the above
9. The differential equation for stream function in two dimensional planar motion with co-ordinate system
as rectangular with Vz = 0 and no Z- dependence and equivalent to Navier-Stokes equation is
a)
b)
c)
d)
∂ (▼^2ψ) + ∂(ψ, ▼^2ψ) = ν▼^4ψ
∂t
∂(x,y)
∂ (▼^2ψ) + 1 ∂(ψ, ▼^2ψ) = ν▼^4ψ
∂t
r ∂(x,y)
∂ (▼^2ψ) + r∂(ψ, ▼^2ψ) = ν▼^4ψ
∂t
∂(x,y)
r ∂ (▼^2ψ) + ∂(ψ, ▼^2ψ) = ν▼^4ψ
∂t
∂(x,y)
e) None of the above
10.
The flow in a circular tube illustrates
a)
b)
c)
d)
e)
11.
role of pressure and gravity
role of boundary conditions
role of gravity force
handling of tangential & normal forces
None of the above.
Through coquette viscometer we can obtain the
a)
b)
c)
d)
e)
only shear rate dependence on viscosity
only temperature dependence on viscosity
molecular weight dependence on viscosity
a, b, and c
none of the above
12.
Determine the maximum average velocity when air is flowing through horizontal tube
of 5cm diameter and at which laminar flow has to be stable?
a) 0.54m/s
b) 0.36m/s
c) 0.90m/s
d) 0.63m/s
e) None of the above
13.
The application of stokes flow equation can be found in
a)
b)
c)
d)
e)
14.
Along a streamline in a fluid in steady static flow, the Bernoulli equation gives relation
between –
a)
b)
c)
d)
e)
15.
study of particle motion in suspension
lubrication theory
flow through porous media
all of above
None of the above.
velocity & pressure
velocity & elevation
Elevation & pressure.
Velocity, elevation & pressure
none of the above
For the gas at low density and liquids
a) The viscosity increases for gasses and decreases for liquids with increasing
Temperature
b) The viscosity decreases for gasses and increases for liquids with increasing
Temperature
c) the viscosity increases for both liquids and gases with increasing temp
d) the viscosity decreases for both liquids and gasses with increasing temp
e) none of the above
16.
The constant of proportionality in Newton’s law of viscosity
a)
b)
c)
d)
e)
17)
By using dimensional analysis
a)
b)
c)
d)
e)
18)
velocity gradient of fluid
dynamic viscosity
kinematic viscosity
velocity of fluid
none of above
we can check the correctness of equation
determine units for the variable in equation
we can reduce the number of the variables
All of the above
None of the above.
for obtaining first derivative in solving viscous flow problems the main factor is
a) differential equation for force
b) differential equation for velocity
c) differential equation for momentum flux
d) differential equation for momentum flux
e) None of the above.
19)
which of the following are the assumptions made before deriving Hagen-poiseuille equation
a) flow is non-Newtonian
b) flow is turbulent
c) fluid behaves as continuum
d) density is not constant
e) None of the above
20)
The Applications of Ultrasound Doppler effect can be found in
a) Medical (finding blood flow velocity)
b) Radar system
c) Astronomy
d) All of the above
e) None of the above.