Chemical Engg. Fluid Mechanics MCQ's Essay

2829 Words Oct 8th, 2013 12 Pages
Id

Question
The fluid property, due to which, mercury does not wet the glass is
A
surface tension
B
viscosity
C
cohesion
D
adhesion
Answer
A
Marks
1
Unit
A1

Id

Question
The dimension of dynamic viscosity is
A
ML-1T-1
B
L2T-1
C
LT-2
D
ML-1T-2
Answer
A
Marks
2
Unit
A1

Id

Question
The fluid, in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
A
Bingham
B
Newtonian
C
perfect
D
none of these
Answer
C
Marks
1
Unit
A1

Id

Question
Pick out the wrong statement.
A
The shear stress at the pipe (diameter = D, length = L) wall in case of laminar flow of Newtonian fluids is
B
In the equation, the
…show more content…
C
Cannot remain at under action of any shear force.
D
Cannot be subjected to shear forces.
Answer
B
Marks
1
Unit
A1

Id

Question
An ideal fluid
A
Is very viscous
B
Obeys Newton’s law of viscous
C
Is assumed in conduit flow
D
Frictionless and incompressible
Answer
D
Marks
1
Unit
A1

Id

Question
In equilibrium condition, fluids are not able to sustain
A
Shear force
B
Resistance to viscosity
C
Surface tension
D
Geometric similitude
Answer
A
Marks
1
Unit
A1

Id

Question
The stress-strain relation of the Newtonian fluid is
A
Linear
B
Parabolic
C
Hyperbolic
D
Inverse type
Answer
A
Marks
1
Unit
A1

Id

Question
A fluid in equilibrium can’t sustain
A
Tensile stress
B
Compressive stress
C
Shear stress
D
Bending stress
Answer
C
Marks
1
Unit
A1

Id

Question A fluid having no viscosity is known as
A
Real fluid
B
Ideal fluid
C
Newtonian fluid
D
Both A &C
Answer
B
Marks
1
Unit
A1

Id

Question A fluid whose viscosity does not change with the rate of deformationOr shear strain is known as
A
Real fluid
B
Ideal fluid
C
Newtonian fluid
D
non newtonian fluid
Answer
C
Marks
1
Unit
A1

Id

Question When the fluid is at rest the shear stress is
A
Maximum
B
zero
C
unpredictable
D
none
Answer
B
Marks
1
Unit
A1

Id

Question The fluid which has no viscosity and surface tent ion is known as
A
Real

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