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SPECIAL BOILERS LICENSING EXAM
| MINNESOTA SPECIAL ENGINEER
BOILER EXAM | ALL QUESTIONS
AND CORRECT ANSWERS |
ALREADY GRADED A+ | LATEST
EXAM 2024
A _________ receives a signal representing a variable, such as temperature, pressure, or flow, and converts that signal into an electrical or digital signal that is compatible with a digital control system. ------ CORRECT ANSWER---------------transducer A fan located between the breeching and the stack in a(n) _______. ------ CORRECT ANSWER---------------induced draft fan Class _______ fires are electrical fires, such as motor or transformer. ------ CORRECT ANSWER---------------C type A main steam stop valve would most likely be a(n) ____________. ------ CORRECT ANSWER---------------os&y gate valve The evaporation of 34.5 pounds of water per hour from and 212 degrees F is defined as ___________. ------CORRECT ANSWER---------------one boiler horsepower
A compound gauge is a pressure gauge that indicates ___________. ------ CORRECT ANSWER---------------vacuum in inches of mercury or pressure in psi on the same gauge When burning No. 6 fuel, a(n) ____________ is required. ------CORRECT ANSWER---------------fuel oil heater A ___________ prevents the flow of boiler water back to the city water supply. ------CORRECT ANSWER---------------backflow preventer The amount of energy in a fuel is the _____________. ------CORRECT ANSWER---------------heating value _____________ is the accumulation of minerals such as calcium and magnesium on boiler heating surfaces. ------CORRECT ANSWER------------- --scale Tubes in a firetube boiler are mounted into the _________ located at the front and rear of the boiler. ------CORRECT ANSWER---------------tube sheet For the purpose of rating boiler horsepower for an Engineers License only, how many square feet of boiler surface shall be equivalent to one boiler horsepower on a boiler? ------CORRECT ANSWER---------------10 Sq. Ft. Heating Surface
A tri indicator would inform the boiler operator of what? ------CORRECT ANSWER---------------The TEMPERATURE of the water, the PRESSURE of the water in PSIG, and the ALTITUDE of water in feet. What is the destructive force in a steam or hot water boiler explosion? ------ CORRECT ANSWER---------------The instant release of energy stored in the water as heat. An ASME approved safety relieve calve used on a hot water boiler is tested at the factory on what? ------CORRECT ANSWER---------------Steam first then hot water. Some of the things you could find on a steam boiler (or hot water boiler) are what? ------CORRECT ANSWER---------------Low water cut off, safety valve or safety relief valve, pressure gauge. What devices would only be found on a steam boiler? ------CORRECT ANSWER---------------Steam pressure gauge, tricocks, Pressuretrols An expansion tank or compression tank would be used in what? ------ CORRECT ANSWER---------------Hot water boiler What is the purpose of the expansion tank? ------CORRECT 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? ------ CORRECT 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? ---- --CORRECT ANSWER---------------Have the valve repaired or replaced. Tri cocks or gauge cocks are sued on a steam boiler to indicate? ------ CORRECT 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? ------CORRECT 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? ------ CORRECT ANSWER---------------Water in the boiler. True or False: Bottom blow down valves are used for both steam and hot water. ------CORRECT ANSWER---------------True Safety valves or safety relief valves should be manually tested at least...? -- ----CORRECT ANSWER---------------Monthly
On a steam boiler what is a siphon or pigtail used for? ------CORRECT ANSWER---------------To protect the steam gauge from too high of temperature. What is one reason causing the expansion tank to fill with water? ------ CORRECT 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? ------CORRECT ANSWER---------------Shut off the burner and allow boiler to cool. What is the purpose of the bottom blow down on a steam boiler? ------ CORRECT ANSWER---------------To remove sludge and sediment and to drain the boiler. When blowing down the water column the water should do what? ------ CORRECT ANSWER---------------Refill the gauge glass quickly. When doing the annual boiler inspection the boiler should... ------ CORRECT ANSWER---------------Water and fire side cleaned and inspection ports open. Purging is part of what cycle? ------CORRECT ANSWER---------------Firing cycle
All steam traps will prevent steam from passing through them but will allow what to pass through them? ------CORRECT 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? ------CORRECT ANSWER---------------A spring loaded direct acting safety valve or safety relief valve. Before testing a low water fuel cut-out what must be done? ------CORRECT ANSWER---------------The burner must be on. Heat can be transferred in how many ways? ------CORRECT ANSWER------ ---------Three. Aqua stats work by sensing: ------CORRECT ANSWER--------------- Temperature. Name the different ways heat can be transferred and give a definition of each way. ------CORRECT ANSWER---------------Radiation, Conduction, Convection How many types of boilers are there? ------CORRECT ANSWER--------------
- Three: Fire tube, Water tube, Cast iron sectional
Give an example of cold water start for a hot water boiler. ------CORRECT ANSWER---------------XXX Two low water fuel cut-outs are required when the BTU input of the burner exceeds: ------CORRECT ANSWER---------------750, A boiler equipped with the two low water fuel cut-outs must have _______________ on the secondary low water fuel cut-out. ------ CORRECT ANSWER---------------A manual reset. A boiler with a new burner OR a new boiler room must have: ------ CORRECT ANSWER---------------A kill switch by each door leaving the boiler room. The low water fuel cut off should be tested: ------CORRECT ANSWER------- --------At least once a day when the boiler is in operation. What is the purpose of a check valve used in a feed water line going to a steam boiler? ------CORRECT ANSWER---------------To restrict the flow in one direction only. Where would you expect to locate pyrometer? ------CORRECT ANSWER--- ------------In the exhaust gases leaving the boiler What would the pyrometer tell you? ------CORRECT ANSWER--------------- The temperature
An aqua state would be used on what type of boiler? ------CORRECT ANSWER---------------A hot water boiler Globe valves are used when you need to: ------CORRECT ANSWER--------- ------Throttle or restrict the flow Three types of drafts are: ------CORRECT ANSWER---------------Natural, forced, and induced. The number of blowdowns required is determined by_____________. ------ CORRECT ANSWER---------------boiler water analysis A ____________ pump is a boiler accessory used to draw condensate back from the system by producing a negative pressure on the condensate return lines. ------CORRECT ANSWER---------------vacuum Oxygen in the boiler water causes ________. ------CORRECT ANSWER---- -----------pitting A therm is equivalent to _________ Btu. ------CORRECT ANSWER----------- ----100, A(n) _________ draft fan is located before the furnace. ------CORRECT ANSWER---------------forced
At the NOWL, the gauge glass is approximately half full. ------CORRECT ANSWER---------------True A low water condition in the boiler can cause overheating of the tubes. ------ CORRECT ANSWER---------------True City water does not require treatment for use in boilers. ------CORRECT ANSWER---------------False Steam traps prevent the flow of condensate back to the feed-water pumps. ------CORRECT ANSWER---------------False Clogged fuel oil strainers cause high suction readings. ------CORRECT ANSWER---------------True A safety data sheet is printed material used to relay chemical hazard information from the manufacturer, importer, or distributor. ------CORRECT ANSWER---------------True Draft can be measured with manometer. ------CORRECT ANSWER----------- ----True Sludge is removed from the boiler with a surface blowdown. ------ CORRECT ANSWER---------------False
A deaerator is a boiler water treatment accessory that heats feedwater to the temperature of saturated steam within the pressure vessel. ------ CORRECT ANSWER---------------True All valves are closed when completing a dry lay-up. ------CORRECT ANSWER---------------True The boiler room log is used to record boiler operations events. ------ CORRECT ANSWER---------------True Forced circulation hot water heating systems are more common in large buildings than natural circulation hot water heating systems. ------ CORRECT ANSWER---------------True The pressure reducing valve in a hot water heating system regulates the pressure of water returning from heating units. ------CORRECT ANSWER--- ------------False A boiler is an open vessel in which water is transformed into steam under pressure by application of heat. ------CORRECT ANSWER---------------False An HRT boiler is a watertube boiler ------CORRECT ANSWER--------------- False
For low pressure steam boilers, the capacity of the safety valve must be large enough that the boiler pressure cannot rise more than _______ above the MAWP. ------CORRECT ANSWER---------------5 psi Flame safeguard systems can monitor _________. ------CORRECT ANSWER---------------pilot and main flame Sensors used for flame detection in boilers include __________. ------ CORRECT ANSWER---------------lead sulfide cell, ultraviolet scanner, and thermocouple (All of the above) A _________ blowdown is performed to remove sludge from the boiler. -----
- CORRECT ANSWER---------------bottom A pH level of 7.0 is an indication that the boiler water is __________. ------ CORRECT ANSWER---------------neutral, neither basic or acidic Standard atmospheric pressure is approximately _________ psia. ------ CORRECT ANSWER---------------14. Specific gravity is the ratio of weight of a volume of a substance to the weight of the same volume of ________. ------CORRECT ANSWER---------- -----water
Heat transfer can occur by _________. ------CORRECT ANSWER------------ ---conduction, convection, radiation (All of the above) The theoretical amount of air is often called the ______ amount. ------ CORRECT ANSWER---------------primary Boiler safety valves should be repaired by a(n) ____________. ------ CORRECT ANSWER---------------authorized safety valve repair company Safety Data Sheets should only be available to supervisors and managers. ------CORRECT ANSWER---------------False The EPA does not regulate discharges of waste water from utility and industrial boilers. ------CORRECT ANSWER---------------False High surface tension of boiler water from floating foreign matter causes and increase in __________. ------CORRECT ANSWER---------------foaming Blowing down is most effective during a period when steam output is _________. ------CORRECT ANSWER---------------at a low rate The water column must be located __________. ------CORRECT ANSWER---------------at the normal operating water level
Draft in a boiler is measured in _________. ------CORRECT ANSWER------- --------inches of water A positive pressure before the furnace indicates _________ draft. ------ CORRECT ANSWER---------------forced Preparation for a boiler inspection requires having the boiler _________. --- ---CORRECT ANSWER---------------cool, opened, and thoroughly cleaned
