Question 41 : The diameter of turbine used in centrifugal well pump is
1. 50cm
2. 64cm
3. 15cm
4. 100cm
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Question 42 : Consider the following statements regarding vortex chamber.
1. Reduce the velocity of the pump
2.Convert pressure energy into kinetic energy
3. Decrease the efficiency of the pump
Which of the above statement is correct?
1. Only 1
2. Only 2
3. Only 3
4. 1, 2, 3
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Question 43 : Which part of centrifugal well pumps prevents the back flow through the pump?
1. Delivery pipe
2. Foot valve
3. Strainer
4. Check valve
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Question 44 : The maximum number of impellers in a centrifugal well pump is
1. 20
2. 30
3. 40
4. 50
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Question 45 : The unit of specific speed is
1. Metre/second
2. Metre/second²
3. Centimetre/second
4. Dimensionless
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Question 46 : The maximum efficiency of a centrifugal pump is
1. 50%
2. 60%
3. 85%
4. 100%
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Question 47 : Which of the following pump is based on the type of power?
1. Low lift pump
2. High lift pump
3. Air lift pump
4. Steam engine pump
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Question 48 : When the specific speed of the pump is <2600, the type of pump is
1. Reciprocating pump
2. Centrifugal pump
3. Mixed flow pump
4. Axial flow pump
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Question 49 : The specific speed of a pump is given by
1. NQ^1/2 / H ²
2. NQ^1/2 / H ^3/4
3. NQ/ H^3/4
4. NQ ^1/2 / H^1/4
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Question 50 : In figure 1, 'B' is represented by _______
1. Total static head
2. Total dynamic head
3. Shut off head
4. Minimum head
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