Examen
Boiler Operator Licensing Exam | 135 Questions With Complete Solutions.
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1 or more safety valves - all steam boilers must have Locked closed - before anyone enters the boiler drum, the main steam stop valve, bottom blowdown valves, & feedwater valves should be 212 degrees F - at atmospheric pressure, water begins to boil at approximately Fuel oil, gas, & coal - fuel...
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