Ohio Boiler Licensing Practice Exam

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• A steam turbine that operates at 500 psi is considered what type of pressure?
• What is the most economical method for partially loading a small steam turbine?
• What is the percentage of excess air needed for complete combustion when using a fuel oil burner?
• When comparing fuel oils to coal, what is true?
• What is true about an industrial boiler as compared to a utility boiler?
• What is the primary function of a dashpot in a steam turbine governor?
• What is the primary role of a steam trap in a steam system?
• To prevent what adverse condition should the pH of water in the cooling system be kept above 7?
• What condition can occur in a boiler under stress with high alkalinity maintained?
• If a priming situation occurs, what should be done?
• Which non-destructive testing method is used to expose surface and near-surface flaws using a dust of iron particles?
• What happens when water is added to the boiler?
• What happens to the ID of a tube when a new tube is installed in a firetube boiler?
• What is the maximum allowable working pressure (MAWP) in relation to a boiler's operation?
• How can temporary hardness be removed from water?
• What is a reason the state can take your boiler license away?
• What action must be taken when a boiler is put into service?
• What is the first thing that must be done when starting up a brand new boiler?
• Where does water exit the blowdown tank?
• For what reason is it important for lube oil to not give off volatile vapors?
• How many square feet of heating surface are required to produce 1 hp in a HRT firetube boiler?
• What cannot be used to determine the relative air quantity delivered to the furnace during normal boiler operation?
• If a boiler pressure is greater than or equal to 400 psig, what is required?
• Where must a drain valve be installed in relation to the main steam line?
• What is the first step to take when shutting down a steam turbine?
• What should not be done to valves connected to a water column while the boiler is in operation?
• What is another name for a low gas pressure switch?
• How many square feet of heating surface are required to produce 1 hp in a watertube boiler?
• How often are sootblowers for economizers and air preheaters used when firing coal?
• What is the best way to achieve good water treatment results?
• When taking a boiler offline, what is the first step?
• What component in a cooling tower primarily assists with the exchange of heat with the atmosphere?
• What is the only way to know for sure how much carbon monoxide you have coming out of the stack?
• What grade of fuel oil may be ignited by an electric spark from electrodes powered by an ignition transformer?
• What should be done if unusual vibrations are detected in a boiler?
• What is the purpose of using copper sulfate in cooling towers?
• At what temperature range should cooling water be added to turbine bearings that are generating heat?
• Which type of pump is best suited for use with the fuel oil burner system?
• When designing a boiler, special consideration must be given to heat transmission by?
• When starting a fire in a coal-fired boiler with chain grates or traveling grates, how much coal should be on the grates?
• What system is directly piped into your boiler flash tank?
• The frequency of ash removal in a coal-fired furnace with dumping grates should be determined by what factor?
• Which of the following is true regarding a boiler pressure mercury switch?
• What should be the valve configuration when starting a centrifugal pump?
• An impulse turbine utilizing one row of stationary steam nozzles to drive two rows of rotating blades is called what?
• A lubrication with a low viscosity is usually adapted for what type of use?
• What is not a type of automatic combustion control system?
• What is the primary difference between a high pressure gas burner and a low pressure gas burner?
• What advantage does a filter baghouse have over an electrostatic precipitator in its operation?
• What is an example of a cogeneration system?
• What is the cheapest and easiest form of water treatment?
• What is a key benefit of using a zeolite softener for water treatment?
• What is the minimum steam flow that should be maintained through the superheater?
• What principle describes the operation of a centrifugal pump?
• What determines the need for a safety valve on a steam turbine?
• What items can an electronic flue gas analyzer read?
• What is a critical reason for monitoring steam quality in a superheated boiler?
• What is a potential consequence of not maintaining a minimum steam flow through the superheater?
• What happens if condensation is not properly drained from a steam system?
• If a safety valve is set on a 50 psi boiler system, what is the maximum pressure that may develop during safety valve blowdown?
• What compound is produced from the reaction between sodium sulfite and oxygen?
• In a low-pressure boiler using a screw-feed retort stoker, what area is NOT considered a combustion zone?
• What is the proper temperature range for turbine bearings during normal operation?
• Which of the following best describes the main purpose of a drain valve in a steam system?
• When lighting a low pressure gas burner on a LP boiler, what is the last step?
• The performance and lifespan of a centrifugal pump depend majorly on what components?
• What type of feedwater regulator is equipped with a fuel shutoff feature?
• Why is it important to maintain proper water levels in a boiler?
• During an accumulation test, the boiler is fired at which of the following?
• What type of water can be added to a boiler without treating it first?
• A boiler is considered an industrial boiler when?
• What condition does graphitization cause in boiler steel?
• What is one purpose of the feedwater tank in a boiler system?
• What is blistering of boiler metal?
• Which type of draft creates pressure that is lower than atmospheric pressure in the furnace?
• What is the correct procedure for cleaning a turbine oil cooler?
• What type of steam turbine has steam take-offs prior to going to the condenser?
• Which of the following is a slow deformation of metal over time under continual stress and high temperature?
• What is a common symptom of a malfunctioning fuel oil burner?
• What is the primary purpose of a boiler's tri-cock?
• Which component is essential for draining condensate in a steam system?
• If a closed feedwater heater is functioning properly, what should be the temperature of the feedwater as it exits the heater?
• What equipment is primarily used to reduce sulfur dioxide (SO2) emissions?
• When taking a boiler out of service, what is one thing you do NOT do?
• How often should the makeup water feeder in a low pressure boiler be blown down?
• What are the potential results of flame impingement on boiler tubes?
• What is a consequence of using cold city water as makeup in a low pressure boiler system?
• What can occur if water accumulates in a steam system?
• What is the term for the process of adding water to enhance combustion in a coal-fired boiler?
• If the tubes in a boiler are expanded during installation, what will be true?
• When the water level in a steam boiler is proven to be low, what is the first step?
• When preparing a boiler for long-term layup, what material is commonly placed inside the boiler?
• The efficiency of a spray pond or cooling tower is primarily based on which environmental factor?
• What is a likely consequence of ignoring a boiler tube leak?
• What does the term 'blowdown' refer to in the context of boiler operation?
• A well-maintained wet scrubber can absorb what percentage of SO2 in the flue gas?
• Which of the following is NOT a purpose of the feedwater tank?
• When banking a fuel oil-fired boiler, what should you do?
• Under what condition must a boiler have two bottom blowdown valves?
• What is the first step to take when warming up a tubular gauge glass?
• Which factor is crucial for preventing corrosion in boiler systems?
• What should you not lock out when a boiler is shut down for inspection?
• Which action indicates proper maintenance of a gauge glass?
• In which type of draft system is chimney design considered the least important?
• What is the maximum recommended concentration of calcium chloride in a boiler when the feedwater averages 6 ppm?
• How long does it typically take for the boiler water level to drop from half a sight glass to no water showing?
• How does the efficiency of a boiler change with a rise in feedwater temperature?
• In which situation is copper tubing not suitable for steam service?
• What is the role of the condensate pump in a surface condenser?
• What property should lube oil have at temperatures between 325 to 350 degrees?
• What limits the amount of coal that can be burned per square foot of grate surface?
• What should happen if you suddenly lose the ID fan on a balanced draft boiler installation equipped with interlocks?
• When adjusting the firing rate due to foaming, what should also be considered?
• Where must your boiler license be displayed?
• What must you do if your boiler license is still valid and you lose it?
• What is an action you should avoid during a boiler startup?
• If a steam boiler is being taken out of service, what step should be taken first?
• When laying up a boiler in a dry state, which substance is NOT used as a desiccant?
• A centrifugal turbine pump is primarily characterized by what feature?
• What key aspect does a pigtail siphon provide in boiler instrumentation?
• What condition can oils and solids accumulation on the water surface in the boiler lead to?
• Which instrument is not used to measure the quantity of combustion air?
• What can occur if the pH level in water becomes too low in a cooling system?
• What controls the flow of natural gas to the gas burner to ensure the proper combustion rate?
• How often should the oil burner be cleaned on a high pressure boiler when firing heavy oils?
• What is true about welding performed on boilers?
• What is the maximum pressure for using a seatless-type blowdown valve?
• What pH value indicates alkalinity in water?
• What common type of expansion joint is used in steam distribution systems?
• The energy needed to fill the suction side of a centrifugal pump and overcome friction and flow losses is referred to as what type of head?
• What is the last step to be performed when shutting down a boiler?
• When used on a boiler, what is the minimum sized steel pipe that can be utilized?
• What material is typically used to line the interior of a furnace?
• What is the key to achieving smokeless combustion?
• How much of the total steam produced by a boiler is relieved by a superheater safety valve?
• What does the operation of a thermostatic steam trap depend on?
• What is the maximum allowable blowback on a safety relief valve set for 100 psig?
• Which chemical is commonly used to manage algae accumulation in cooling towers?
• Which type of steam trap contains both a piston and a valve?
• In the context of steam turbines, what is the most critical factor to prevent system failures?
• What parts make up the heating surface in a scotch marine firetube boiler?
• What is the primary purpose of a water screen in a boiler?
• What device is used to prevent overpressure in a steam turbine system?
• When should sootblowers for heating surfaces be utilized when firing coal?
• Which component is essential for the ignition of fuel oil in a burner system?
• What is the main purpose of monitoring boiler water levels?
• Which water test utilizes a color comparison method?
• What is the primary function of a microcomputer burner control system (MBCS)?
• What material is typically recommended for low-pressure steam piping?
• What is the minimum size of an elliptical manhole on a boiler?
• What is the minimum blowback on a safety valve that pops at 250 psig?
• What can bad washers in a low-pressure boiler's gauge glass cause?
• To keep an electrostatic precipitator working effectively, you should?
• If laying up a boiler for a short time, what concentration of caustic soda should be maintained in the boiler water?
• An infrared sensor uses what type of scanning device to detect a flame?
• When testing a safety valve manually on a low-pressure boiler, how long do you hold it open?
• Which type of boiler is the most economical to build?
• What is the draft condition recommended when using soot blowers?
• How quickly must a flame detector in an industrial boiler detect loss of flame?
• Calcium and magnesium are removed by which external water treatment process that can be regenerated using sodium chloride?
• What does the term "net positive suction head" refer to in relation to a centrifugal pump?
• During boiler maintenance, what is the primary risk to personnel?
• Which statement is true regarding the operation of an overfeed stoker?
• On what type of boiler are sootblowers primarily used?
• Which type of boiler requires the least square footage of heating surface for 1 hp?
• How should the pressure switch be installed on a low pressure boiler?
• What property should lubricating oil in a turbine not possess?
• What supplies the condensate pump on a surface condenser?
• If a high-pressure boiler is operating below its MAWP, where should the pointer on the pressure gauge be?
• How do steam separators function in a steam system?
• What is the purpose of a flame scanner in a boiler?
• What limitations does a pump that must draw its suction from below face?
• When upgrading your boiler license to a higher level, what must be done with the previous license?
• What should be done before relighting a pulverized coal-fired boiler after a flame failure?
• Which flow measurement device employs a float within a tapered glass tube?
• If your boiler license expires, how long do you have to renew it before you must retest?
• What is the minimum size of piping that can be used on a pressure gauge?
• When the bottom blowdown valve on the water column is closed and water fills the gauge glass quickly to the center, what does this indicate?
• What factor must be considered when selecting materials for the construction of a flue gas scrubber system?
• What is one of the main purposes of a valve in a steam system?
• What should be the minimum air flow during the pre-purge of a gas or oil fired boiler?
• Your economizer raises the temperature of the feedwater by 10 degrees. What is the efficiency rate increase associated with this?
• Considering the limitation on materials of construction of a steam turbine, what is the maximum temperature of steam that may be used?
• Why is it important to maintain a fuel oil burner regularly?
• Gas flames have a tendency to pulsate; this can be eliminated by?
• What is the maximum acceptable level of dissolved solids in steam supplied to a steam turbine?
• Before operating manually controlled sootblowers on a boiler, what should be done first?
• How many square feet of heating surface are required to produce 1 hp in a vertical firetube boiler?
• What is one function that a bottom blowdown does not perform?
• Which type of water treatment is most effective for continuous operation boilers?
• In a surface condenser system, what is the primary function of the hot well?
• How often should the flame scanner be tested?
• Which condition caused by improper water treatment may be corrected by maintaining proper alkalinity?
• How can you find the water level if the gauge glass is broken?
• When the water in a boiler is foaming, how will the water level appear in the gauge glass?
• What action is recommended if there is a fire in the pulverizer?
• What is cast iron or ductile iron pipe primarily used for?
• What is the minimum pressure above which the exhaust side of a steam turbine may be protected by a safety valve or rupture disc?
• What function does a pressure gauge serve in a boiler system?
• If a boiler carries a large slug of water over into the steam, this condition is termed what?
• What is a true statement about the operation of induced draft cooling towers?
• In a steam system, what is the impact of air presence on heat transfer efficiency?
• When activating an induced draft cooling tower, what is the last step in the procedure?
• What can cause vibrations in a turbine?
• What type of valve is typically placed between the condenser and the turbine when operating in condensing mode?
• What is the pressure on a low pressure gas burner?
• For a low pressure boiler, what does a data plate marked 6900 lb indicate for a safety valve?
• Which factor is crucial before performing a hydrostatic test on a boiler?
• What fan blade design is most effective in preventing erosion from flyash particles in flue gas?
• What action should be taken if the superheater pressure exceeds safe levels?
• For how long may an operator be away from the boiler without risking safety?
• What type of feedwater regulator is considered best for a boiler that experiences wide pressure and load swings?
• What is the term used for a gauge that reads higher than the actual boiler pressure?
• To raise the pH of boiler water, what should be added?
• What is the minimum percentage of oxygen that must be present in a confined space before entering?
• Which type of heat transfer takes place by actual physical contact, from molecule to molecule, without displacing the molecules?
• For optimal performance in a fluidized bed coal boiler, the coal should be crushed to what size or smaller?
• Which safety measure is critical in superheated boiler operations?
• When a steam turbine operates in a condensing manner, what is the primary purpose of the atmospheric relief valve?
• What should be done if a watertube boiler experiences a tube rupture?
• What is a common practice to optimize the performance of cooling towers?
• If a high pressure boiler operates at 100 psig, what should the blowback of the safety valve be?
• Which of the following components is not typically used in the protection of the exhaust side of a steam turbine?
• What is not a type of firetube boiler?
• Which test is commonly used to measure hardness in water?
• Which chemical is typically used to neutralize acidity in boiler treatment?
• What is the temperature limit for preheated air when operating a stoker-fired boiler?
• What is the desirable condition for operation of a boiler with a superheater for maximum economy?
• According to ASME code, how often should boiler blowdown occur if no water analysis is made?
• What is the satisfactory concentration of chlorides in boiler water compared to feedwater in low and medium pressure boilers?
• Utility boilers are primarily used to produce?
• When is it necessary to perform a pressure test on a boiler?
• Which valve should be checked first if a boiler is experiencing abnormal water levels?
• What are the recommended percentages of underfire air versus overfire air when using a stoker coal-fired boiler?
• What is an indicator of excessive alkalinity in boiler water?
• What is the primary purpose of silica gel during a dry layup?
• What can excessive ash buildup in a fuel oil burner lead to?
• What is the minimum temperature of water to be used for a hydrostatic test?
• What is a key difference between a check valve and a non-return valve?
• When should a non-return valve be opened when putting a boiler online?
• How can maintenance of an electrostatic precipitator be kept to a minimum?
• How are fuel oil strainers normally configured in a system?
• What kind of steam is used in a feedwater heater if extraction steam from a turbine is utilized?
• Which is a common safety feature in a boiler system?
• What is a protrusion on a tube referred to as?
• If you are found in violation of licensing rules, what is the first warning you will receive?
• What is the minimum frequency for cleaning a strainer that protects the automatic makeup feeder in a low pressure boiler?