Engine_2014 : Steam Plants - 214/1951
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| Boiler furnace brickwork can be fractured and broken by thermal shock caused by __________ . |
| A) leaving the registers open on a hot boiler |
| B) load changes on the boiler while answering bells |
| C) allowing the furnace to cool too slowly |
| D) cold feed water passing through the boiler economizer |
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