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