Boiler License Test Questions with Correct Answers

Boiler License Test Questions with Correct Answers Natural draft is produced by? - Answer-difference in temperature outside chimney from inside chimney If a draft fan is located between the boiler and chimney, what type of draft system is it? - Answer-Induced draft boiler fittings are important for: - Answer-safety only thermostatic traps remove air and cool condensate: true or false - Answer-True The main purpose of testing a safety value is to: - Answer-make sure valve operates freely when testing a safety valve by hand, you must: - Answer-have at least 75% of popping pressure If a license is expired, how long can it be expired before it is null and void? - Answer-3 years What is the purpose of a check valve? - Answer-prevent reverse flow, allows flow in one direction What is a solenoid valve? - Answer-An automatic gas shutoff valve What # oil needs to be preheated with what piece of equipment? - Answer-#6 oil with a heater What type of test is a hardness test? - Answer-A titration test What is the most important rule in operating boilers? - Answer-keep water at proper level what is the capacity of a safety valve measured in? - Answer-Pounds of steam per house (#steam/hr) What prevents a furnace explosion? - Answer-The purge cycle Ignition failure would cause activation of the: - Answer-Purge Cycle What is the most common cause of cast iron boiler failure? - Answer-Cracking What is the most common cause of problems in a hot water system? - Answer-Air Where would you place a water temperature indicator? - Answer-At the boiler supply A chief engineer is not needed in a low pressure plant: true or false - Answer-True The positioning control cannot function without? - Answer-air what fire tube boiler is most efficient - Answer-4 pass What is the maximum size blowdown line? - Answer-2 1/2 inches when do you close a boiler vent? - Answer-When steam comes out Carryover can lead to: - Answer-water hammer if water leaves the boiler at 170 degrees, what temperature does it return at? - Answer150 degrees Where are the combustion gases on a serpentine boiler? - Answer-below the tubes What does PSIA stand for? - Answer-Psig + atmospheric pressure When should the water column and gauge glass should be blown down? - Answer-Daily What oil has to be heated? - Answer-#6 oil Natural water may contain: - Answer-solids and other pollutants The expansion tank in a hot water system allows for the expansion of: - Answer-water As the water in a hot system expands: - Answer-the pressure remains constant Boiler water should have a pH of: - Answer-11 safety valves should be tested: - Answer-once a month What is the most important fitting on a boiler? - Answer-Safety valve An aquastat is sensitive to change in: - Answer-Water temperature Who can adjust a safety valve? - Answer-Manufacturer representative When connecting a Bourdon tube steam gauge to a boiler, a pigtail is used to: - AnswerProtect Bourdon tube from steam What happens when you have a closed oil vent? - Answer-An oil spill What is the minimum temperature of hot water boiler operation to prevent condensation? - Answer-170 The amount of draft is not affected by the height of the stack: True or False - AnswerFalse How many days in adva