Engine_2014 : Motor Plants and Auxiliary Boilers - 1720/2614
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| A safety valve on an auxiliary boiler simmers constantly and can not be stopped by several quick blow-offs using the hand relieving gear. The problem may be __________ . |
| A) loose dirt on the seat |
| B) exposed valve springs |
| C) a clogged drain line |
| D) a damaged seat |
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