Which of the following statements are true? 1. piston pumps are self p – McqOptions

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1.	Which of the following statements are true? 1. piston pumps are self priming2. piston pumps require high mainte ce3. piston pumps have low cost of production 4. piston pumps have low volumetric efficiency
A.	1 and 2
B.	3 and 4
C.	1 and 3
D.	all of the above
Answer» B. 3 and 4

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