4th TSSA Part B Unit 4 Exam Questions and Answers

4th TSSA Part B Unit 4 Exam Questions and Answers Larger capacity, high pressure fuel trains are - Answer-more complex The main burner test firing valve should be opened - Answer-before starting the main burner What is the recommended boiler water pH for wet layup? - Answer-10 R4B Failure to _____ the furnace thoroughly before light-up can cause a furnace explosion. - Answer-purge R4B When cooling down a steam boiler that has been taken out of service, a vent valve on a steam drum should be opened to: - Answer-Prevent a vacuum from forming in the boiler How often should operator rounds be performed? - Answer-1 to 3 times per shift What should Power Engineers carry at all times? - Answer-a flashlight When a power failure occurs, control valves - Answer-go to a fail-safe position. When a combustion air opening is equipped with dampers, the dampers must be - Answer-interlocked with the burner, and fully open before starting the boiler. New boilers require a _____________ and a _____________ dry-out before entering operation. - Answer-boil-out, refractory R4B If a steam boiler is in service and no water level shows in the gauge glass, the first action would be to: - Answer-determine whether the gauge glass is completely full or completely empty. Because natural gas is colourless and odourless, ___________ is added to the gas so that it is easier to detect a leak. - Answer-mercaptan In a multiple boiler high pressure steam plant, when starting an entire system from cold - Answer-The entire system warms and pressurizes as one boiler warms, except for the boilers being left off line. On a semi-automatic ignition system, the switch on the supervised cock - Answer-keeps the boiler from pre-purging if the main test firing valve is open. Which code contains information on safety valves for high pressure steam boilers? - Answer-ASME Section I R4B New refractory in a boiler must be thoroughly dried on low fire - Answer-to dry the refractory slowly and keep it from cracking. What is the recommended test frequency for flame safeguard devices? - Answer-weekly If the safety relief valve of a hot water heating boiler is set to open at 207 kPa, the operating pressure should not exceed - Answer-138 kPa