Minnesota Boilers Special Engineers Exam

What is meant by the term low pressure boilers? - Correct Ans-boilers operating at 15 p.s.i.g. steam or less; or a hot water boiler operating at 160 p.s.i.g. Or less and temperature 250 deg. or less. A person holding a current state of MN special license can be in charge of - Correct Ans-all classes of boilers not to exceed 50 HP Any overheating or burning and any major repairs should be reported to the - Correct Ans-boiler inspector A special engineer can be a shift engineer on a plant of ____________ horse power - Correct Ans-100 Who is responsible for seeing that the boiler gets inspected? - Correct Ans-owner and operating engineer A special engineer can serve as an apprentice on - Correct Ans-all classes of boilers under direct supervision What is the minimum frequency of tests of a low pressure safety valve or a safety relief valve by hand? - Correct Ans-quarterly The purpose of a low water fuel cut out is to ____________ in a steam or hot water boiler. - Correct Ans-protect boiler in case of low water ____________ prevents dangerous pressure from building up within a steam or hot water boiler - Correct Ans-ASME approved safety valve and safety relief valve What is the destructive force in a steam or hot water boiler explosion? - Correct Ans-the instant release of energy stored in the water as heat Hot water systems are equipped with ____________ for the expansion and contraction of the water volume as the temperature varies. - Correct Ans-expansion tanks What should be displayed on the boiler room wall? - Correct Ans-both inspection certificate and proper engineers license What is a bottom blow down valve on a steam boiler used for? - Correct Ans-removing sediment BOILERS BOILERS What is a bottom blow down valve used for on a hot water boiler? - Correct Ans-draining the boiler The ____________ is the most important electrical mechanical device on your boiler. - Correct Ans-low water cut off When blowing down the gauge glass the water level should return to the operating level - Correct Ans-quickly How does an insurance inspector differ from a state inspector? - Correct Ans-a state inspector has to have a chief grade A license What is the first duty of an engineer when entering the boiler room? - Correct Ans ensure safe water level in all operating boilers What is the most important fitting on a boiler? - Correct Ans-safety valve Before starting a fire in a boiler the fire side must be - Correct Ans-purged; 4x exchanged What is the most dangerous act an operator can do if the water level in the boiler cannot be determined? - Correct Ans-add water A log book should be kept on a daily basis and made available to the inspector - Correct Ans-true If an ASME rated safety valve or safety relief valve leaks you should - Correct Ans-have the valve replaced The safety valve and the safety relief valve can be tested by - Correct Ans-lifting the lest lever AND raising the boiler up to the popping pressure After filling a hot water boiler with water, what must be done? - Correct Ans-vent out all the air Why do boiler operators blow down water columns, gauge glasses and low water cut offs? - Correct Ans-so they are free and open What can be done to a boiler to check it for leaks? - Correct Ans-hydrostatic test Can a boiler be operated with a broken sight glass? - Correct Ans-yes What must be on all boiler feed piping to prevent contamination of the city water supply? - Correct Ans-backflow preventer BOILERS BOILERS The ____________ tells the operator the true water level in a boiler - Correct Ans-tri cocks What would you do if you came into the boiler room and there was no water in the boiler? - Correct Ans-shut the boiler down Before lighting off any boiler you should check for ____________ - Correct Ans-water in the boiler How much time do you have to wait before you can go up for the 2nd class exam? - Correct Ans-one year What is the BEST way to check a safety valve on a steam boiler? - Correct Ans-raise the steam pressure until the valve pops When is the BEST time to blow down a boiler while it is on line? - Correct Ans-when the load is light How should a boiler blow down be opened? - Correct Ans-slowly What is the proper way to blow down a sight glass? - Correct Ans-open the drain valve After replacing a gauge glass, what is the proper way to warm it up? - Correct Ans-crack open the steam valve open it slowly If the gauge glass breaks, how would you proceed to shut it off - Correct Ans-close the water valve first If the gauge glass becomes plugged and a reading can't be ascertained, what should you do? - Correct Ans-continue to operate the boiler using the tri-cocks In replacing hand hole and man hole cover gaskets it is good practice to always use new ones? - Correct Ans-true In case of low water in a boiler, how would you know if it was safe to keep the boiler in operation by increasing the flow of water into the boiler? - Correct Ans-if water comes out of the gauge glass drain valve for 30 secondsto test After the boiler has been washed out or opened up for the inspection and filled, why is it a good practice to put water pressure on it? - Correct Ans-to test for leaking gaskets In starting up a cold boiler that has been out of service for a while, what is very important to do? - Correct Ans-open the vent valve What two boiler appliances should agree? - Correct Ans-the safety valve and the steam gauge BOILERS What causes boiler foaming? - Correct Ans-dirty or greasy water What must be a boiler operator maintain at all times? - Correct Ans-ALL: Proper water level, complete combustion, and boiler license Which of the following causes water hammer? - Correct Ans-letting steam in a cold pipe to fast Carrying the water level too high in a steam boiler could cause priming - Correct Ans True If the check valve in a feed line should stick, it can generally be loosened by