Question 21 : A diffuser pump is also called as _______ pump.
1. Reciprocating pump
2. Volute pump
3. Turbine pump
4. Rotary pump
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Question 22 : Which part of centrifugal well pumps act as a self priming device?
1. Delivery pipe
2. Foot valve
3. Strainer
4. Check valve
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Question 23 : The specific speed of the pump is 8000. What is the type of pump?
1. Reciprocating pump
2. Centrifugal pump
3. Mixed flow pump
4. Axial flow pump
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Question 24 : Which of the following is the correct classification of pumps?
1. Physical principle of operation
2. Mechanical principle of operation
3. Chemical principle of operation
4. Biological principle of operation
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Question 25 : When the pumps are in series operation
1. H = H₁ + H₂
2. 1/H = 1/H₁ +1/ H₂
3. Q = Q₁ + Q₂
4. 1/Q = 1/Q₁ + 1/Q₂
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Question 26 : Displacement pump is classified on the basis of
1. Mechanical operation of principle
2. Type of power
3. Type of service
4. Efficiency
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Question 27 : The efficiency of the pump at quarter load is
1. 50%
2. 70%
3. 80%
4. 100%
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Question 28 : The speed at which the centrifugal pump runs (in r.p.m) is
1. 200
2. 300
3. 500
4. 1200
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Question 29 : The rated discharge is represented by
1. C
2. D
3. E
4. F
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Question 30 : Which one of the following is correct?
1. C = Maximum efficiency
2. D = Minimum efficiency
3. C = Rated discharge
4. D = Shutoff head
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