Fluid Mechanics

41. Center of pressure on an inclined plane is

1. at the centroid
2. above the centroid
3. below the centroid
4. at metacentre
5. at center of pressure.

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42. Choose the correct relationship

1. specific gravity = gravity x density
2. dynamicviscosity = kinematicviscosity x density
3. gravity = specific gravity x density
4. kinematicviscosity = dynamicviscosity x density
5. hydrostaticforce = surface tension x gravity.

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43. Choose the wrong statement

1. fluids are capable of flowing
2. fluids conform to the shape of the containing vessels
3. when in equilibrium, fluids cannot sustain tangential forces
4. when in equilibrium, fluids can sustain shear forces
5. fluids have some degree of comprehensibility and offer little resistance to form.

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44. Choose the wrong statement. Alcohol is used in manometer, because

1. its vapour pressure is low
2. it provides suitable meniscus for the inclined tube
3. its density is less
4. it provides longer length for a given pressure difference
5. it provides accurate readings.

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45. Density of water is maximum at

1. 0°C
2. 0°K
3. 4°C
4. 100°C
5. 20°C.

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46. Differential monometer is used to measure

1. pressure in pipes, channels etc.
2. atmospheric pressure
3. very low pressure
4. difference of pressure between two points
5. velocity in pipes

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47. Dimensions of surface tension are

1. MlL°T2
2. MlL°Tx
3. MlL r2
4. MlL2T2
5. MlL°t.

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48. During the opening of a valve in a pipe line, the flow is

1. steady
2. unsteady
3. uniform
4. laminar
5. free vortex type.

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49. Dynamic viscosity of most of the gases with rise in temperature

1. increases
2. decreases
3. remains unaffected
4. unpredictable
5. none of the above.

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50. Dynamic viscosity of most of the liquids with rise in temperature

1. increases
2. decreases
3. remains unaffected
4. unpredictable
5. none of the above.

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