Question 11 : What is the formula for the velocity of water jet at the inlet of turbine?
Where,
H = Net head acting on Pelton wheel
Cv = coefficient of velocity of jet
1. V = Cv((gH)^(1/2))
2. V = 2Cv((gH)^(1/2))
3. V = Cv((2gH)^(1/2))
4. V = 2Cv((gH)^(1/2))
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Question 12 : The hydraulic efficiency of a reaction turbine, is the ratio of
1. actual work available at the turbine to energy imparted to the wheel
2. power produced by the turbine to the energy actually supplied by the turbine
3. work done on the wheel to the energy actually supplied to the turbine
4. none of the mentioned
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Question 13 : In a reciprocating pump, air vessels are used to
1. increase delivery head
2. reduce suction head
3. smoothen the flow
4. reduce acceleration head
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Question 14 : Geometric similarity is said to exist between the model and the prototype, if both of them
1. are equal in size and shape
2. have identical velocities
3. have identical forces
4. are identical in shape, but differ only in size
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Question 15 : Which of the following pump is generally used to pump highly viscous fluid?
1. Air lift pump
2. Centrifugal pump
3. Screw pump
4. Reciprocating pump
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Question 16 : For centrifugal pump impeller, the maximum value of the vane exit angle is
1. 100 to 150
2. 150 to 200
3. 200 to 250
4. 250 to 300
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Question 17 : In a Francis turbine runner, the number of blades are generally between
1. 2 to 4
2. 8 to 16
3. 4 to 8
4. 16 to 24
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Question 18 : The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is
1. high speed with radial flow at outlet
2. slow speed with radial flow at outlet
3. medium speed with radial flow at outlet
4. high speed with axial flow at outlet
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Question 19 : Which of the following pump is preferred for flood control and irrigation applications?
1. Reciprocating pump
2. Axial flow pump
3. Mixed flow pump
4. Centrifugal pump
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Question 20 : Discharge of a centrifugal pump is
1. inversely proportional to (diameter)² of its impeller
2. inversely proportional to diameter of its impeller
3. directly proportional to (diameter)² of its impeller
4. directly proportional to diameter of its impeller
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