Minnesota Special Engineer Boiler License Practice Exam Questions 2025

A Special Engineer is expected to be competent, take charge of, and be responsible for the safe operation and maintenance of all classes of boilers of not more than ___________ HP and their appurtenances. - Correct Ans-50 A gauge glass can be attached to a ____________ column, which is attached to a boiler. - Correct Ans-water In accordance with the statutes of the State of Minnesota, one boiler horsepower for conventional boilers is equal to ____________ - Correct Ans-10 sq ft of boiler heating surface In accordance with the statutes of the State of Minnesota, one boiler horsepower for steam-coil-type generators is equal to ____________ - Correct Ans-5 sq ft of boiler heating surface When the boiler heating surface cannot be discerned, the boiler horsepower shall be determined by dividing the Btu input by ____________ - Correct Ans-67,000 In accordance with the statues of the State of Minnesota, each electric boiler horsepower is equal to ____________ kilowatts - Correct Ans-10 A logbook must be maintained in the boiler room by the ____________ - Correct Ans the chief engineer or the operating engineer designee The shift engineer of a high pressure boiler plant of over 200 HP must stay within ____________ of boiler room at all times during the shift? - Correct Ans-500 ft A high pressure boiler must have two means of feedwater supply if it exceeds ____________ HP. - Correct Ans-50 When used, a quick-opening blowdown valve must be located ____________ - Correct Ans-nearest to the boiler The minimum passing score for a Minnesota engineer's license examination is ____________% - Correct Ans-70 Licenses granted must be displayed in ____________ - Correct Ans-a conspicuous place in the engine or boiler room BOILERS BOILERS For the purpose of the boiler and pressure vessels statutes, "a year" is considered to be at least ____________ hr. - Correct Ans-2000 Sensible heat is ____________ - Correct Ans-able to cause a change in temperature Heat that brings about of state without causing a change in temperature is ____________ - Correct Ans-called latent heat In a boiler, heat is transferred from the burning fuel to the water by ____________, ____________, and ____________ - Correct Ans-convection, conduction, radiation Convection is method of heat transfer where the movement of the fluids is due solely to the ____________ - Correct Ans-flow of fluids Large high pressure utility boilers use ____________ - Correct Ans-balanced draft When heat transfer occurs by traveling through metal, it is known as ____________ - Correct Ans-conduction An example of the transfer of heat by radiation is ____________ - Correct Ans-the heating effect of the sun on the earth The document governing boiler fittings and valves is the ____________ Code. - Correct Ans-ASME The best method of testing a low-water fuel cutoff (LWCO) is to ____________ - Correct Ans-lower the water level in the boiler to the level where the burner should cut out Rules governing the construction of power boilers are set out in ____________ - Correct Ans-ASME Code Section I A way to determine if a safety valve on a boiler has sufficient capacity is to ____________ - Correct Ans-perform an accumulation test An example of nondestructive test on a boiler is a(n) ____________ test - Correct Ans x-ray The material used most frequently for piping is ____________ - Correct Ans-low carbon steel In a natural draft furnace, the amount of draft is affected by the ____________ - Correct Ans-height of the stack A check valve is a valve that ____________ - Correct Ans-Allows flow in one direction only BOILERS BOILERS Expansion bends or joints are installed in piping systems to ____________ - Correct Ans-allow for expansion and contraction of the piping without causing damage The main purpose of installing insulation on steam system piping is to ____________ - Correct Ans-prevent heat loss The purpose of a steam trap is to ____________ - Correct Ans-remove air and condensate from steam lines Boiler stays ____________ - Correct Ans-are used to support tube sheets in a boiler Handhole and manhole openings ____________ - Correct Ans-Permit inspection, cleaning and repairs A low-water fuel cut (LWCO) is used on a boiler to prevent ____________ - Correct Ans-damage to the boiler from overheating The boiler heating surface ____________ - Correct Ans-can be used to determine the boiler capacity With regard to steam boilers, the letters "HRT" mean ____________ - Correct Ans horizontal return tubular When the hot combustion gases travel through boiler tubes which are surrounded by the boiler water, the boiler is called a - Correct Ans-firetube The two general designs of electric boilers are the ____________ types. - Correct Ans electrode and resistance Continuous blowdown systems are used in boilers ____________ - Correct Ans-to help control the dissolved solids concentration A watertube boiler is a boiler that has ____________ - Correct Ans-water on the inside of the tubes and hot gas on the outside of the tubes The low-water fuel cutoff (LWCO) is a device fitted to the boiler to shut off the ____________ - Correct Ans-fuel supply to the burners when water level in the boiler is low The purpose of the spring in a safety valve is to ____________ - Correct Ans-force the valve to open at the correct pressure The safety valve test lever must not be used unless ____________ - Correct Ans another licensed engineer is present BOILERS BOILERS A siphon tube is necessary to ____________ - Correct Ans-prevent water from entering a steam gauge A test connection between the siphon tube and the boiler pressure gauge is needed to ____________ - Correct Ans-test steam temperature at the pressure shown on the gauge Try cocks on a water column are used to ____________ - Correct Ans-check the water level in the boiler A ____________ blowdown is performed to remove sludge from a boiler - Correct Ans bottom Boiler baffles are used ____________ - Correct Ans-in every boiler furnace The float chamber of the low-water fuel cutoff (LWCO) is frequently blown down to prevent the ____________ - Correct Ans-float chamber from collecting sediment The feedwater line must contain ____________ - Correct Ans-a check valve between a stop valve and a boiler A bottom blowdown system can be equipped with slow-opening and quick-opening vales, with the quick-opening valve located ____________ - Correct Ans-closest to the boiler and opened first A ____________ valve should be used if a valve is required in a steam line for throttling action - Correct Ans-globe The combustible elements in fuels are ____________, and ____________ - Correct Ans-carbon and hydrogen Black smoke can be caused by - Correct Ans-Insufficient combustion air ____________ is the flow of air or gases of combustion caused by a difference in pressure between two points - Correct Ans-Draft The main function of a gas burner is to ____________ - Correct Ans-mix the gas with combustion air Combustion is a ____________ - Correct Ans-chemical combination of the elements of