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| Q. |
What happens to the reciprocating pump when left untouched? |
| A. | efficiency decreases |
| B. | wear and tear |
| C. | surface expansion |
| D. | pressure change |
| Answer» C. surface expansion | |
| 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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