When lighting off an auxiliary boiler which of the problems listed could cause the burner

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• 1、When________ that it was getting late I put off the light and went to bed.A findB fi
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• 2、The correct procedure for giving an auxiliary boiler a bottom blow is to begin .A.when th
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• 3、When there is a flame failure in an automatically fired auxiliary boiler the _____.
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• 5、Prior to lighting off a cold automatically fired auxiliary boiler yon should _____.
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