Minnesota Special Engineer Boiler License Practice Exam | 60 Questions with 100% Correct Answers | Verified | Latest Update

Minnesota Special Engineer Boiler License Practice Exam | 60 Questions with 100% Correct Answers | Verified | Latest Update What devices would only be found on a steam boiler? - ANSWER -Steam pressure gauge, tricocks, Pressuretrols An expansion tank or compression tank would be used in what? - ANSWER -Hot water boiler What is the purpose of the expansion tank? - ANSWER -To provide for expansion and contraction of the water volume as its temperature varies. On a hot water boiler, what is the purpose of the vent valve? - ANSWER -To make sure there is water inside the boiler and to vent any trapped air. If the safety valve or ASME safety relief valve leaks you would do what? - ANSWER -Have the valve repaired or replaced. Tri cocks or gauge cocks are sued on a steam boiler to indicate? - ANSWER -The true water level inside the boiler. On a steam or hot water boiler, the safety valve or safety relief valve could be tested by? - ANSWER -When the boiler is running lifting the lever on the valve or raising the pressure until they operate. Before starting a steam or hot water boiler you should check for what? - ANSWER -Water in the boiler. True or False: Bottom blow down valves are used for both steam and hot water. - ANSWER -True Safety valves or safety relief valves should be manually tested at least...? - ANSWER -Monthly The low water cut out is one of the most important electrical/mechanical devices on your boiler. How often should you test it? - ANSWER -Daily What device must be located between a hot water boiler and the expansion tank? - ANSWER -A shut off valve so the expansion can be isolated and drained during operation of the boiler. On a hot water boiler, every time the burner operates the safety relief valve opens. Why? - ANSWER -The expansion tank is water logged, or the isolating valve for the expansion tank is closed. An Aquastat is used on a...? - ANSWER -Hot water boiler To reduce thermal shock on hot water boilers, what devices are used? - ANSWER -Low limit or low fire hold control, three way valve, run around pump. On a steam boiler the control named operator will... - ANSWER -On pressure decrease: Start. On pressure increase: Stop. On a hot water boiler the control called the operator will... - ANSWER -On temperature decrease: Start. On temperature increase: Stop. On a steam boiler what is a siphon or pigtail used for? - ANSWER -To protect the steam gauge from too high of temperature. What is one reason causing the expansion tank to fill with water? - ANSWER Air leaks from the gauge glass fitting. What would you do if you cam into a boiler room and found no water in the boiler? - ANSWER -Shut off the burner and allow boiler to cool. What is the purpose of the bottom blow down on a steam boiler? - ANSWER -To remove sludge and sediment and to drain the boiler. When blowing down the water column the water should do what? - ANSWER Refill the gauge glass quickly. When doing the annual boiler inspection the boiler should... - ANSWER -Water and fire side cleaned and inspection ports open. Purging is part of what cycle? - ANSWER -Firing cycle All steam traps will prevent steam from passing through them but will allow what to pass through them? - ANSWER -Dirt, air, and condensate. How do we know if we are using and approved safety valve for a steam boiler or a safety relief valve for a hot water boiler? - ANSWER -A spring loaded direct acting safety valve or safety relief valve. Before testing a low water fuel cut-out what must be done? - ANSWER -The burner must be on. Heat can be transferred in how many ways? - ANSWER -Three. Aqua stats work by sensing: - ANSWER -Temperature. Name the different ways heat can be transferred and give a definition of each way. - ANSWER -Radiation, Conduction, Convection How many types of boilers are there? - ANSWER -Three: Fire tube, Water tube, Cast iron sectional What type of boiler can be made larger? - ANSWER -Cast Iron sectional