Utilitiesman Basic Boilers Exam Questions and All Correct Answers

Utilitiesman Basic Boilers Exam Questions and All Correct Answers Which acid is NOT required in chemical cleaning of boilers? -boric -sulfuric -citric -sulfamic - ANSWER Boric acid Which are scale-forming elements? -silicon and calcium -calcium sulfate and precipitates of hardness -precipitates of hardness and silica -magnesium and iron - ANSWER Precipitates of hardness and silica At what temp, in degrees Fahrenheit, should the boiler water sample be for the conduct of the "caustic alkalinity without tannin" test? - ANSWER 70 degrees When should the drum vent valve be opened during normal operations? - ANSWER When drum pressure drops to 25 psig In a water-tube boiler how are baffles usually arranged? - ANSWER Directly across the tubes three times prior to being discharged from the boiler What is the purpose of citric acid? - ANSWER Removal of boiler waterslide deposits (True or false) the lower ends of all tubes must be cleaned from the water drum or header. - ANSWER True Boilers operating at what pressure are normally used for hot water generation? - ANSWER 15 psi or less How often is a hydrostatic test performed on a boiler? - ANSWER Annually Safety shutdown sequence will commence after how many seconds after pilot flame is not established and confirmed? - ANSWER 7 seconds How is water corrosion reduced? - ANSWER Maintaining the boiler water alkalinity at proper levels How do you describe the identification of a water-tube boiler. - ANSWER Products of combustion surround the tubes through which the water flows Tubes of 2 inches outside diameter are belled to what minimum distance, in inches? - ANSWER 1/8" How many safety valves are required on a boiler that has more than 500 square feet of heating surface? - ANSWER 2 What is the only means of obtaining the correct ratio of fuel to air? - ANSWER Setting of air damper During normal operation of the boiler, how many responsibilities does the operator have? - ANSWER 2 At what temperature, in degrees Fahrenheit, should the boiler water sample be for the conduct of the "caustic alkalinity with tannin" test? - ANSWER 160 degrees What are the three lengths associated with the electrode assembly? - ANSWER High, low, and burner cutout