Boiler Operator Licensing Exam Questions With Verified Answers

Boiler Operator Licensing Exam Questions With Verified Answers all steam boilers must have - answer1 or more safety valves before anyone enters the boiler drum, the main steam stop valve, bottom blowdown valves, & feedwater valves should be - answerLocked closed at atmospheric pressure, water begins to boil at approximately - answer212 degrees F fuels most commonly used in boilers - answerFuel oil, gas, & coal must be connected to the highest part of the steam side of the boiler - answerSteam pressure gauge with an NOWL in a boiler, the gauge glass is approximately - answerHalf full a high surface tension on top of the boiler water can lead to - answerFoaming Bottom blowdown on a boiler removes sludge & sediment from the - answerMud drum a boiler fusible plug is brass or bronze with a core of - answerTin a steam pressure gauge is calibrated in - answerPounds per square inch a secondary means of determining boiler water level - answerTry cocks fires caused by spontaneous combustion are most likely to occur in the - answerOily waste rag storage a siphon installed between the boiler & the pressure gauge protects the Bourdon tube from - answerSteam boiler feedwater is chemically treated to - answerPrevent formation of scale in a firetube boiler, soot accumulates on the - answerInside tube surface the pressure applied on the boiler during a hydrostatic test should be - answer1.5 times the MAWP as fuel oil is heated, its viscosity is - answerDecreased the induced draft fan is located between the boiler & the - answerChimney the flash point of fuel oil is the minimum temperature at which the fuel will - answerFlash when exposed to an open flame the fire point of fuel oil is the minimum temperature at which the fuel will - answerBurn continually the pour point of fuel oil is the ____ temperature at which fuel oil will ____ - answerLowest; flow fuel oil with a low flash point is - answerDangerous to handle the operating range of a steam boiler is controlled by a - answerPressure control water hammer in steam lines is caused by - answerCondensate in the line measures the difference in pressure between 2 points, measures draft - answerManometer the best time to blowdown a boiler is when it is at its - answerLowest load Boilers that are laid up dry have trays of ____ put in the steam & water drums to absorb moisture - answerSilica gel required to obtain complete combustion of a fuel - answerMixture; atomization; temperature; time oxygen in the boiler causes - answerPitting when the boiler low water alarm is ringing, the operator should - answerSecure the fires & feedwater a furnace explosion can be prevented by - answerPurging the furnace after ignition failure a lead sulfide cell which is used for flame detection is sensitive to - answerInfrared light a pop safety valve is - answerSpring loaded to test a low water fuel cutoff using an evaporation test, the boiler operator must - answerSecure feedwater going to the boiler hazard signal system provides container label information about hazardous material - answerNFPA to prevent vacuum from forming on a boiler that is coming offline - answerOpen the boiler vent low pressure boilers equipped with quick opening & screw valves are blown down by opening the ____ valve first & closing it ____ - answerQuick opening; last the viscosity of fuel oil is the measurement of the - answerInternal resistance to flow