Question 1 : At high Reynolds number
1. inertial forces control and viscous forces are unimportant.
2. viscous forces predominate.
3. inertial forces are unimportant and viscous forces control.
4. none of these.
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Question 2 : Foot valves provided in pumps are __________ valves.
1. three/four way
2. pressure reducing
3. relief
4. directional control
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Question 3 : The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime ?
1. 2
2. 5
3. 1
4. 0.5
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Question 4 : Power loss in an orificemeter is __________ that in a venturimeter.
1. data insufficient, cannot be predicted
2. less than
3. same as
4. more than
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Question 5 : What is the normal range of exit cone angle of a venturimeter ?
1. >25
2. 7 to 15
3. 15 to 25
4. 2 to 5
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Question 6 : If the discharge of a centrifugal pump is throttled, then its suction lift
1. remains unchanged
2. decreases
3. increases
4. data insufficient to predict
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Question 7 : Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.
1. twice
2. smaller than
3. larger than
4. same as
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Question 8 : The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
1. Newtonion
2. perfect
3. none of these
4. Bingham
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Question 9 : Molten soap mass is transported by a __________ pump.
1. gear
2. reciprocating
3. centrifugal
4. diaphragm
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Question 10 : Schedule number of a pipe, which is a measure of its wall thickness, is given by
1. 10000 P'/S
2. 100 P'/S
3. 1000 P'/S
4. 1000 S/P'
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