Black Seal- High Pressure Questions with 100% Verified Correct Answers What safety device cuts off fuel supply in the event of loss of ignition? - Correct Answer Flame scanner-Fire eye A flame failure cutout automatically: - Correct Answer Breaks the cycle on a flame-out Where do you find a cyclone separator? - Correct Answer Steam drum What chemicals will prevent oxidation of drum and tubes? - Correct Answer Sodium sulfite and Hydrazine Failure of what device causes a furnace explosion? - Correct Answer Fan failure or purge failure What would one standard atmosphere at 14.7 psi be in feet of water? - Correct Answer 34 feet How often do you test a low water cut-off? - Correct Answer Daily, by blowing down the column A flue gas analysis is done to: - Correct Answer Determine combustion efficiency How often are boilers inspected? - Correct Answer Annually What auxiliary would improve boiler efficiency? - Correct Answer Economizer If a baffle breaks, what happens? - Correct Answer Increase of furnace gases & stack temperature Why are baffles used in steam drums of water tube boilers? - Correct Answer To direct the flow of gasses What device measures draft? - Correct Answer Manometer A manometer is calibrated in: - Correct Answer Inches of water 1 / 2
What type of cycle is the simple power plant cycle? - Correct Answer The Rankine Cycle What is required for complete combustion? - Correct Answer Mixture, atomization, temperature, time (MATT) The main purpose of testing a safety valve is to: - Correct Answer Make sure valve operates freely When testing a safety valve by hand, you must: - Correct Answer Have at least 75% of popping pressure What is the absolute pressure of a 180 psi boiler? - Correct Answer 194.7psia (add 14.7) How many furnace volume air changes should occur during purge? - Correct Answer 4 What valve must be between boiler and safety valve? - Correct Answer No valve What is total force of Safety valve with a 2 1/2 inch disc at 30 pounds pressure? - Correct Answer 2.5 × 2.5 × .7854 × 30= 147psi How do you clean fire tube boilers? - Correct Answer Wire brushes
Water hammer can cause: - Correct Answer Steam pipe failure
Where do you find water in a surface condenser? - Correct Answer In the tubes What is the fee for a three- year renewal? - Correct Answer $80.00 How is a surface condenser set up? - Correct Answer Water flows through tubes that are surrounded by steam How long can your license be expired before it is null and void? - Correct Answer 3 years
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