Boiler Operator Licensing Exam Questions with Correct Answers

Boiler Operator Licensing Exam Questions with Correct Answers 1 or more safety valves - Answer-all steam boilers must have Locked closed - Answer-before anyone enters the boiler drum, the main steam stop valve, bottom blowdown valves, & feedwater valves should be 212 degrees F - Answer-at atmospheric pressure, water begins to boil at approximately Fuel oil, gas, & coal - Answer-fuels most commonly used in boilers Steam pressure gauge - Answer-must be connected to the highest part of the steam side of the boiler Half full - Answer-with an NOWL in a boiler, the gauge glass is approximately Foaming - Answer-a high surface tension on top of the boiler water can lead to Mud drum - Answer-Bottom blowdown on a boiler removes sludge & sediment from the Tin - Answer-a boiler fusible plug is brass or bronze with a core of Pounds per square inch - Answer-a steam pressure gauge is calibrated in Try cocks - Answer-a secondary means of determining boiler water level Oily waste rag storage - Answer-fires caused by spontaneous combustion are most likely to occur in the Steam - Answer-a siphon installed between the boiler & the pressure gauge protects the Bourdon tube from Prevent formation of scale - Answer-boiler feedwater is chemically treated to Inside tube surface - Answer-in a firetube boiler, soot accumulates on the 1.5 times the MAWP - Answer-the pressure applied on the boiler during a hydrostatic test should be Decreased - Answer-as fuel oil is heated, its viscosity is Chimney - Answer-the induced draft fan is located between the boiler & the Flash when exposed to an open flame - Answer-the flash point of fuel oil is the minimum temperature at which the fuel will Burn continually - Answer-the fire point of fuel oil is the minimum temperature at which the fuel will Lowest; flow - Answer-the pour point of fuel oil is the ____ temperature at which fuel oil will ____ Dangerous to handle - Answer-fuel oil with a low flash point is Pressure control - Answer-the operating range of a steam boiler is controlled by a Condensate in the line - Answer-water hammer in steam lines is caused by Manometer - Answer-measures the difference in pressure between 2 points, measures draft Lowest load - Answer-the best time to blowdown a boiler is when it is at its Silica gel - Answer-Boilers that are laid up dry have trays of ____ put in the steam & water drums to absorb moisture Mixture; atomization; temperature; time - Answer-required to obtain complete combustion of a fuel Pitting - Answer-oxygen in the boiler causes Secure the fires & feedwater - Answer-when the boiler low water alarm is ringing, the operator should Purging the furnace after ignition failure - Answer-a furnace explosion can be prevented by Infrared light - Answer-a lead sulfide cell which is used for flame detection is sensitive to Spring loaded - Answer-a pop safety valve is Secure feedwater going to the boiler - Answer-to test a low water fuel cutoff using an evaporation test, the boiler operator must NFPA - Answer-hazard signal system provides container label information about hazardous material Open the boiler vent - Answer-to prevent vacuum from forming on a boiler that is coming offline Quick opening; last - Answer-low pressure boilers equipped with quick opening & screw valves are blown down by opening the ____ valve first & closing it ____ Internal resistance to flow - Answer-the viscosity of fuel oil is the measurement of the Change scale forming salts to a nonadhering sludge - Answer-feedwater is treated chemically before it enters the boiler to Minimal amount of excess air - Answer-complete combustion is defined as burning all fuel using 5 psi - Answer-when testing the safety valve by hand, there should be at least ____ of pressure on the boile