Question 1 : The energy of water entering the reaction turbine is _______
1. fully the kinetic energy
2. fully the pressure energy
3. partly the pressure energy and partly the kinetic energy
4. unpredictable
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Question 2 : A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the
1. manometric head
2. velocity head
3. kinetic head
4. static head
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Question 3 : If the ratios of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
1. kinematic similarity
2. geometric similarity
3. dynamic similarity
4. none of the mentioned
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Question 4 : In a reaction turbine, the draft tube is used
1. to increase the head of water by an amount equal to the height of the runner outlet above the tail race
2. to transport water to downstream
3. to run the turbine full
4. to prevent air to enter the turbine
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Question 5 : A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
1. 0.26
2. 0.36
3. 0.46
4. 0.56
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Question 6 : The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, will be
1. 40%
2. 50%
3. 60%
4. 80%
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Question 7 : Which of the following turbine is preferred for 0 to 25 m head of water?
1. Kaplan Turbine
2. Pelton Turbine
3. Francis Turbine
4. None of the mentioned
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Question 8 : Multi-stage centrifugal pumps are used to
1. produce high heads
2. give high discharge
3. pump viscous fluids
4. all of the mentioned
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Question 9 : A Francis turbine is used when the available head of water is
1. 0 to 25 m
2. 25 to 250 m
3. > 250 m
4. none of the mentioned
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Question 10 : The impeller of a centrifugal pump may have
1. vortex casing
2. volute casing
3. volute casing with guide blades
4. any of the mentioned
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