Engine_2014 : Steam Plants - 201/1951
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| Before giving a boiler a surface blow, you should __________. |
| A) raise the water level 2 or 3 inches above normal |
| B) lower the water level to the normal level |
| C) reduce the boiler firing rate to the minimum |
| D) take the boiler off the line and let it cool 1 hour |
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