Which of the following is NOT a type of positive displacement pumps?(a) Reciprocating pump(b) Rotary displacement pump(c) Centrifugal pump(d) None of the mentionedThe question was asked during a job interview.My doubt stems from Pumps in section Building Blocks of Dairy Processing of Dairy Engineering

Which of the following is NOT a type of positive displacement pumps?(a

1.	Which of the following is NOT a type of positive displacement pumps?(a) Reciprocating pump(b) Rotary displacement pump(c) Centrifugal pump(d) None of the mentionedThe question was asked during a job interview.My doubt stems from Pumps in section Building Blocks of Dairy Processing of Dairy Engineering
Answer» Correct option is (C) Centrifugal pump Explanation: Centrifugal pump is not a positive displacement pump. Reciprocating pumps move liquid by means of a constant back-and-forth motion of a PISTON, plunger, or diaphragm within a fixed volume or cylinder. Reciprocating pumps can handle viscous and abrasive fluids. They are low-speed machines when compared with centrifugal and ROTARY.

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