Engineering :: Fluid Mechanics and Hydraulic Machines
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1. |
A perfect gas |
A. |
Has zero viscosity |
B. |
Has constant viscosity |
C. |
Satisfies the relation PV = mRT |
D. |
Is incompressible |
E. |
None of the above |
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Answer: Option C
Explanation:
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2. |
An ideal fluid is |
A. |
Similar to a perfect gas |
B. |
Frictionless and incompressible |
C. |
One which obeys Newton's law of viscosity |
D. |
One which satisfies continuity equation |
E. |
One which flows through pipes with least friction |
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Answer: Option B
Explanation:
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3. |
An ideal flow of any fluid must fulfil the following: |
A. |
Newton's law of viscosity |
B. |
Newton's law of motion |
C. |
Boundary layer theory |
D. |
Pascals law |
E. |
Continuity equation |
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Answer: Option E
Explanation:
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4. |
The velocity of a fluid particle at the centre of the pipe section is |
A. |
Maximum |
B. |
Minimum |
C. |
Average |
D. |
r.m.s. |
E. |
Logarithmic average. |
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Answer: Option A
Explanation:
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5. |
The shear stress velocity gradient relation of the Newtonian fluids is |
A. |
Linear |
B. |
Parabolic |
C. |
Hyperbolic |
D. |
Involutic |
E. |
There is no such relation |
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Answer: Option A
Explanation:
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6. |
The units of kinematic viscosity are |
A. |
kg/m2-sec |
B. |
kg sec/m2 |
C. |
m/kg sec |
D. |
m2/sec |
E. |
m kg/sec. |
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Answer: Option D
Explanation:
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7. |
The units of dynamic viscosity are |
A. |
Newton-sec/m2 |
B. |
Newton/m2-sec |
C. |
kg-sec/m |
D. |
kg m2/sec |
E. |
m2/sec |
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Answer: Option A
Explanation:
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8. |
The units of surface tension are |
A. |
Same as units of force |
B. |
Energy/unit area |
C. |
Force/unit area |
D. |
It is dimensionless |
E. |
None of the above |
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Answer: Option B
Explanation:
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9. |
Density in terms of viscosity is |
A. |
Kinematic viscosity/Dynamic viscosity |
B. |
Dynamic viscosity/Kinematic viscosity |
C. |
Kinematic viscosity x dynamic viscosity |
D. |
Any of the above |
E. |
None of the above |
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Answer: Option B
Explanation:
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10. |
Newton's law of viscosity relates |
A. |
Shear stress and rate of angular deformation in a fluid |
B. |
Yield shear stress, rate of angular deformation and viscosity |
C. |
Pressure, velocity and viscosity |
D. |
Shear stress, temperature, viscosity and velocity |
E. |
Pressure, vicosity and rate of angular deformation |
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Answer: Option A
Explanation:
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