Engineering :: Fluid Mechanics and Solid Handling
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| 1. |
A fluid is a substance that |
| A. |
Always sxpands until it fills any container |
B. |
is practically imcompressible |
| C. |
deforms continuously when subjected to a shear stress no matter how small that shear stress may be |
D. |
cannot be subjected to shear stress |
Answer: Option C
Explanation:
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| 2. |
Newtons law of viscosity relates |
| A. |
pressure velocity and viscosity |
B. |
shear stress and rate of angular deformation in a fluid |
| C. |
temperature viscosity and velocity |
D. |
pressure temperature viscosity and rate of angular deformation in a fluid. |
Answer: Option B
Explanation:
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| 3. |
Falling drops of rain acquire spherical shape on account of |
| A. |
temperature |
B. |
viscosity |
| C. |
compressibility |
D. |
surface tension |
Answer: Option D
Explanation:
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| 4. |
A perfect gas |
| A. |
is incompressible |
B. |
has zero viscosity |
| C. |
cannot develop shear stresses |
D. |
has constant specific heats and satisfies PV = nRT. |
Answer: Option D
Explanation:
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| 5. |
The bulk modulus of elasticity for a liquid |
| A. |
is independent of temperature |
B. |
increases with the pressure |
| C. |
has the dimensions of volume |
D. |
is independent of pressure. |
Answer: Option B
Explanation:
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| 6. |
The bulk modulus of elasticity for a liquid has the units |
Answer: Option B
Explanation:
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| 7. |
The bulk modulus of elasticity for an incompressible fluid is |
Answer: Option B
Explanation:
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| 8. |
Viscosity has the dimensions |
| A. |
FL-2T-1 |
B. |
F-1L2T-1 |
| C. |
FL-2T |
D. |
F-1L2T where dimensions M L and T are used for force length and time. |
Answer: Option C
Explanation:
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| 9. |
Newtons law of viscosity states that for a given rate of angular deformation of fluid. |
| A. |
the shear stress is directly proportional to the viscosity |
B. |
the shear stress is inversely proportional to the viscosity |
| C. |
the shear stress is independent of the viscosity |
D. |
the shear stress is directly proportional to the square of viscosity |
Answer: Option A
Explanation:
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| 10. |
The resistance of a fluid to shear depends |
| A. |
upon cohesion only |
B. |
upon its rate of transfer of molecular momentum only |
| C. |
upon its cohesion and rate of transfer of molecular momentum |
D. |
upon other factors than its cohesion and rate of transfer of moleular momentum. |
Answer: Option C
Explanation:
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