Question 31 : __________ pumps are axial flow pumps.
1. none of these
2. Propeller
3. Diffuser
4. Turbine
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Question 32 : Pick out the correct statement.
1. In laminar flow, Newton's law of viscosity does not apply.
2. A forced vortex occurs when fluid rotates as a solid about an axis.
3. In turbulent flow, there are neither cross-currents nor eddies.
4. A free vortex occurs, when fluidrotates as a solid.
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Question 33 : Which of the following is not concerned with the fluid-particle interaction ?
1. Weber number
2. Froude number
3. Drag co-efficient
4. Galileo number
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Question 34 : Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.
1. 200 to 300
2. 0.01 to 0.10
3. 100 to 1000
4. 2 to 3
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Question 35 : For the transfer of solution of thick slurry, the pump used is a __________ pump.
1. reciprocating
2. gear
3. centrifugal
4. diaphragm
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Question 36 : All pipes of a particular nominal size have the same
1. inside diameter
2. thickness
3. outside diameter
4. none of these
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Question 37 : Co-efficient of velocity is __________ the coefficient of discharge.
1. equal to
2. more than
3. not related to
4. less than
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Question 38 : The maximum delivery pressure of compressors can be upto __________ atmospheres.
1. 250
2. 10
3. 1000
4. 100
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Question 39 : Which of the following is not a dimension-less parameter ?
1. Euler number
2. Specific gravity
3. Fanning friction factor
4. None of these
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Question 40 : The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is
1. 0.5
2. 1
3. 2
4. 2
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