M

Mr. Dubey • 52.30K Points
Coach 

Q. What happens to the reciprocating pump when left untouched?

(A) efficiency decreases
(B) wear and tear
(C) surface expansion
(D) pressure change
Correct : Option (C)

Explanation: 
 when left untouched over a period of time, the reciprocating pump undergoes wear and tear. reciprocating pumps have a good life provided that they are not left untouched.

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