WorksheetsTP MCQ Quiz 20th May 2021
Total questions: 26
Worksheet time: 13mins
The relationship between the shear stress and shear rate in the real fluids are part of ____________ .
Non Newtonian behaviour
Newtonian behaviour
Rheological behaviour
None of these
The fluids which obey Newton’s law of viscosity are called _____________ fluids
Non Newtonian fluid
Newtonian fluid
Both of these
None of above
If the shear stress is dependent on time under constant shear rate are called as ___________ .
Shear dependent fluids
Time dependent fluids
All of the above
None of the above
Drilling mud, toothpaste, sewage sludge, chocolate mixture, greases, soap, paper pulp are the examples of _____________________ .
Di latent fluids
Pseudo plastic fluids
Bingham plastic fluids
Reopectic fluids
These fluids exhibit the behaviour of increase in shear stress with the time at a constant rate of shear are called ____________.
Dilatent fluids
Rheopectic fluids
Thixotropic fluids
None of above
The viscosity of liquids is generally much greater than those of gases. The liquid viscosity decrease significantly when the temperature ___________ .
increases
decreases
does not change
None of above
At high pressure, gas viscosity ___________ with the increase in pressure especially near the critical point.
Does not change
Increases
Decreases
None of these
The viscosity of the liquids increases with the pressure, but the effect is generally insignificant at pressure less than _____________ .
10 atmosphere
20 atmosphere
40 atmosphere
50 atmosphere
This expression for the viscosity was obtained by Maxwell in 1860. This equation shows that viscosity of gases is proportional to the ____________ the temperature.
square of
square root of
Two third of
one fourth of
At fluid-solid interfaces, the fluid velocity equals to the velocity with which the ______________ , that is, the fluid is assumed to stick to any solid surfaces with which it is in contact.
fluid is moving
surface itself is moving
Both of these
None of these
At gas-liquid interfaces, the momentum flux in the liquid phase is assumed to be ______________. It means the velocity gradient is nearly equal to zero.
Constant
Zero
Unity
None of these
The Hagen-Poiseuille equation gives the relationship between ___________ . This equation is applicable only for laminar flow where the value of Reynold’s number is less than 2100.
mass flow rate and volumetric flow rate
volume rate of flow and pressure drop.
Pressure and temperature
None of above
Hagen-Poiseuille equation gives the relationship between volume rate of flow and radius of circular pipe as, Volume rate of flow is proportional to ____________
R4
R2
R
R3
A Newtonian fluid is defined as the fluid which
Obeys Hook’s law
Is compressible
Obeys Newton’s law of viscosity
Is incompressible
The dynamic viscosity of a liquid is 1.2 × 10-4 Ns/m2, whereas, the density is 600 kg/m3. The kinematic viscosity in m2/s is
72 × 10-3
20 × 10-8
7.2 × 103
70 × 106
The terminal velocity of a small sphere settling in a viscous fluid varies as the ______________ .
inverse square of the diameter
square of the difference in specific weights of solid & fluid
inverse of the fluid viscosity
first power of its diameter
The velocity profile for turbulent flow through a closed conduit is ____________ .
logarithmic
linear
hyperbolic
parabolic
Applying a pressure drop across a capillary results in a volumetric flow rate ‘Q’ under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is _____________ .
Q/8
Q/16
Q/4
Q/2
Where does the maximum stress occur in case of laminar flow of incompressible fluid in a closed conduit of diameter ‘D’?
At the wall
At D/8 from the wall
At D/4 from the wall
At the centre
Velocity distribution for flow between two fixed parallel plates ___________ .
varies parabolically across the section
is constant over the entire cross-section
is zero at the plates and increases linearly to the midplane
none of these
____________ is the ratio of drag force per unit projected area per product of the velocity head and density of fluid.
Friction factor
Drag
Drag coefficient
None of these
Transport Phenomena subject covers which subjects ?
Momentum transport
Heat transport
Mass transport
All of the above
Which book is useful for study of Transport Phenomena subject ?
R.B. Bird, W.E. Stewart
. C.O. Bennett, J.E. Mayers
Alan S. Foust, Leonard A. Wenzel
All of above
Equation of Motion is obtained from....
Mass balance
Momentum balance
Force balance
None of these
Kozney Carman equation is used when ....
Reynolds number is less than one
Reynolds number greater than 100
Reynolds number is equal to 2100
None of these
Friction factor is ratio of Force exerted per unit projected area to the ....
Velocity head * Density
Velocity * Density
Mass * Velocity
None of these
