3rd Class Stationary Steam Engineer License Practice Test

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Calculating Absolute Pressure from Gauge Pressure in Steam SystemsIf the steam pressure gauge indicates 200 PSIG, what is the absolute pressure?Discover how to prevent vacuum when taking a boiler offlineWhat procedure helps prevent a vacuum when taking a boiler offline?Discovering the Value of a Neutral Solution on the pH ScaleWhat is the value of a neutral solution on the pH scale?Drain blower lines before starting a boiler to ensure safe, efficient combustionBefore using blowers on a boiler, what should be done?How baffles in water tube boilers help keep steam dry and protect the systemBaffles are used in the steam and water drum of water tube boilers to _____.How to Effectively Reduce Fuel Oil ViscosityTo reduce the viscosity of a fuel oil, what must be done?Understanding Atomization in Pressure Oil Burners for 3rd Class EngineersIn a pressure atomizing fuel oil burner, what component is responsible for atomization of fuel oil?Understanding Heating Value: The Role of Therms in Natural Gas Energy MeasurementThe heating value of natural gas is expressed in which unit?Understanding how an economizer heats feed water in a steam generating plantIn a steam generating plant, the economizer is used to _______?Understanding How Excess Air Affects Combustion EfficiencyHow is the amount of excess air in gases of combustion typically determined?Understanding How Tubes in a Water Tube Boiler Are FastenedHow are the tubes in a water tube boiler typically fastened?Understanding Perfect Combustion in Stationary EngineeringWhat is described as perfect combustion?Understanding Safety Features for High-Pressure Boilers Under ASME CodeAccording to ASME code, a high-pressure boiler with more than 500 square feet of heating surface shall have what safety feature?Understanding Safety Valve Adjustments According to ASME CodeAccording to the ASME Code, the adjusting of safety valves should be done by the _______?Understanding Safety Valve Testing in Boiler SystemsWhen testing a safety valve by hand, the pressure on the boiler should be at least _______% of the safety valve set pressure?Understanding Sensible Heat and Its Role in ThermodynamicsSensible heat is defined as heat that does what?Understanding Superheated Steam: What Every Engineer Should KnowIf a boiler produces 40,000 lb of steam/hr at a pressure of 100 PSI and a steam temperature of 500 degrees Fahrenheit, what type of steam is produced?Understanding the Best Way to Remove Hard Scale in TubesHard scale formed on the inside of tubes is best removed by what method?Understanding the BTU Content of Number 6 Fuel OilWhat is the approximate BTU content of number 6 fuel oil?Understanding the Critical Role of Water Level in Boiler OperationsThe primary purpose of the water level in a boiler is to ensure what?Understanding the Essentials of Complete Combustion: Key FactorsWhat factors are necessary for complete combustion?Understanding the Factors That Influence Boiler EfficiencyWhich factor can directly influence boiler efficiency?Understanding the Importance of a Free Blowing Drain for Battery Boilers with Manhole OpeningsWhat is required for a boiler connected in battery when there is a manhole opening?Understanding the Importance of Air Cock Management When Warming Up a BoilerAccording to the ASME code, what should be done with the air cock when warming up a boiler?Understanding the Importance of Chemically Treating Boiler WaterWhy is boiler water chemically treated?Understanding the Importance of Overspeed Trip Tests for Steam TurbinesThe overspeed trip on a steam turbine should be tested:Understanding the Importance of Regular Bottom Blowdown for BoilersWhat is a consequence of not performing regular bottom blowdown in a boiler?Understanding the Key Elements for Combustion to OccurWhat is required for combustion to occur?Understanding the Maximum BHP Calculation for Water Tube BoilersA water tube boiler has 250 tubes that are 20 ft long and 3 inches in diameter. What is the maximum BHP it will produce if it generates one BHP for every 10 sq ft of heating surface?Understanding the Maximum Size of Bottom Blowdown Valves on BoilersThe maximum size bottom blowdown valve on a boiler is what dimension?Understanding the Pressure Limit of Cast Iron Water Columns for Steam SystemsCast iron water columns may be used for pressures up to how many psi?Understanding the Proper Use of Soot Blowers for Boiler MaintenanceBefore using soot blowers, what must be done?Understanding the Reasons Behind High Combustion Gas TemperaturesThe probable cause of an increase in temperature of combustion gases at the boiler outlet is likely what?Understanding the Role of a Glass Gauge in Boiler OperationsWhat is the purpose of a glass gauge in a boiler?Understanding the Role of a Heat Exchanger in Steam SystemsWhat is the purpose of a heat exchanger in a steam system?Understanding the Role of Bypass Dampers in Air HeatersWhat is the function of a bypass damper on an air heater?Understanding the Role of Combustion Control in BoilersWhat does a combustion control on a boiler primarily regulate?Understanding the Role of Try Cocks in Steam Boiler SafetyWhat are try cocks used for?Understanding the Role of Vents in Open Feedwater HeatersWhat is the purpose of a vent on an open feedwater heater?Understanding the Types of Draft Used in Power PlantsWhat are the three types of draft used in power plants?What defines a surface condenser and how it works in steam systemsWhat characterizes a surface condenser?Why automatic toilets ignite the burner in low fire for safer steam boiler startupAutomatic toilets are programmed to ignite the burner ______.Why controlling draft in a burner system is essentialWhy is draft carefully controlled in a burner system?
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  • Where would one typically find ceiling strips that warn of excessive radial tolerance?
  • What is the purpose of the safety valve?
  • What does oxygen in a boiler drum typically cause?
  • High viscosity fuel oil is challenging to work with because:
  • What instrument is essential for monitoring steam pressure in a boiler?
  • Where are downcomer tubes found?
  • Why is it critical to maintain an adequate oxygen level during combustion?
  • What is the primary risk associated with not having an effective blowdown process?
  • A feed water pump will become steam bound if the water temperature in the open feedwater heater is too _______?
  • In a duplex reciprocating feed water pump, the steam piston area must be how much larger than the water piston?
  • A bottom blowdown is performed on a boiler to achieve what purpose?
  • What component of a boiler is primarily affected by spalling?
  • The _________ on the steam turbine functions as a limit switch.
  • In relation to boiler operation, what does the term 'gagged' refer to?
  • How does increased pressure affect the performance of a steam system?
  • What is typically monitored to assess the efficiency of a steam boiler?
  • What does the air flow switch at the burner fan housing indicate?
  • A gas pressure regulator is used to control the ______.
  • How much heating surface area does a water tube boiler with a diameter of 3 1/2" and a length of 20' have?
  • How many bottom blowdown valves are required on boilers operating at pressures above 100 psi?
  • In coal classification, which term refers to the hardness of the coal?
  • What is the purpose of the siphon between the boiler and the steam pressure gauge?
  • What does a steam trap do during operation?
  • If a motor rated at 25 horsepower is delivering 20 horsepower, what percentage of its capacity is it operating at?
  • How many BTUs are approximately found in 1 cubic foot of natural gas?
  • Why is controlling the air-fuel ratio critical in boiler operation?
  • An accumulation test is primarily used to determine what aspect of a boiler system?
  • What is the function of baffles in a boiler?
  • Why is proper sizing of a manhole important?
  • What is the primary purpose of a steam trap?
  • What is the primary function of a pressure control on a boiler?
  • Which of the following is an indicator of excessive scale buildup in a water tube boiler?
  • A boiler with 3450 square feet of heating surface designed for 5 square feet of heating surface per BHP has how many horsepower?
  • A condensate pump is located 75 feet below the feed water heater, and its discharged gauge reads 75 PSI. The pressure at the inlet to the heater is _______ psi.
  • When should a water column and gauge glass be blown down normally?
  • Water in a D rating feed water heater is prevented from entering the steam line by what mechanism?
  • A thermostatic trap opens when which component contracts?
  • A flame scanner is used to verify what in boiler operations?
  • The range of a pressure gauge should be at least how many times the safety valve setting?
  • Approximately how much does one gallon of No. 6 fuel oil weigh?
  • A boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. What is the blowdown?
  • The frequency of performing a bottom blowdown is determined by what?
  • A boiler generating 6000 lb of steam/hr produces how many BTU/hr?
  • Boilers that are equipped with air heaters and economizers usually have _____ draft fans.
  • The heat absorbed by water when changing from liquid to steam at the boiling point is called _______?
  • What type of steam is characterized by being at 250 psia and 400 degrees Fahrenheit?
  • Approximately how much air is required to completely burn 1 lb of fuel oil?
  • Boilers in a battery equipped with what must have two main steam stop valves and a free-flowing drain between them?
  • At atmospheric pressure, at what temperature does water boil and turn to steam?
  • Who should perform safety valve repairs?
  • What is the purpose of a desuperheater drain in a steam system?
  • When may the diameter of a chimney need to be increased?
  • An economizer located in the path of the gases of combustion increases boiler efficiency by approximately how much for each 10°F rise in feed water temperature?
  • A high-pressure boiler operates at a pressure above which of the following PSI levels?
  • A temperature reading of 80 degrees Celsius is equal to:
  • A boiler evaporates 48,000 lb of steam/hr at a rate of 12 lb of steam/sq ft of heating surface. The boiler has _______ square feet of heating surface.
  • Complete combustion occurs when _______?
  • Three boilers are connected to a common header, each carrying 100 PSI. What would the pressure gauge on the header read?
  • What is generally used for temperature control in a steam condensing system?
  • How can chemicals be added to a boiler system?
  • What is the BTU content of natural gas?
  • Which component is essential to prevent water hammer in steam systems?
  • What is the recommended action to check the water level on a boiler?
  • How does air requirement relate to the combustion of 1 lb of fuel oil?
  • When is extra heavy steel pipe required on a boiler bottom blowdown line?
  • What type of pump is a reciprocating pump classified as?
  • An oil cooler is commonly used with which component when operating in conjunction with a turbo-generator?
  • What is the pH classification of boiler water with a pH of 11?
  • Which component controls the proper function of the burner in relation to air and fuel?
  • The ASME Code recommends that safety valves should be adjusted by which personnel?
  • If the burner is firing and there is no water in the gauge glass, what should be done?
  • What protects sewer lines from pressure and temperature when blowing down a boiler?
  • Stay bolts are typically used in which type of boiler?
  • What are the three most common fuels used in boilers?
  • Pressure atomizing burners atomize fuel oil using _______.
  • Which safety device is typically found in steam systems?
  • The boiling point of water will do what with an increase in pressure?
  • A chimney temperature of 250 degrees Fahrenheit above steam temperature indicates:
  • When performing a hydrostatic test on a boiler, what must be done with the safety valve?
  • ______ draft is produced by a fan located between the boiler and the chimney:
  • Which safety feature is essential in preventing boiler overpressure?
  • How is a steam pressure gauge protected against excessive temperature?
  • With what is an automatic non-return valve typically used?
  • What is the purpose of the economizer on a boiler?
  • Increasing the temperature of feed water by 10 degrees Fahrenheit results in what percentage increase in plant efficiency?
  • How does snow accumulation on boiler tubes affect thermal efficiency?
  • When taking over a shift, the first thing to check is the ________.
  • Which type of valve is primarily used for controlling steam flow?
  • How many BTUs are needed to raise the temperature of 1 lb of water from 32°F to 212°F?
  • A steam trap serves what primary function?
  • What is sensible heat?
  • Under what pressure is it permissible to have one blowdown valve on a boiler?
  • Which substance is commonly used to control the pH of boiler water?
  • What is the primary hazard associated with high CO2 levels during combustion?
  • A thermostatic steam trap opens when which of the following occurs?
  • Which fitting is considered the most important on a boiler?
  • Circulating water passes through a surface condenser ________.
  • What is the function of combustion controls on a boiler?
  • What is the term used for carrying over particles of water with the steam?
  • When performing a hydrostatic test on a boiler, what must be done to each safety valve?
  • What are package boilers programmed to do upon start-up?
  • The minimum size of a water column blowdown valve is how many inches?
  • The Pour point of a fuel oil is ________.
  • What must be done after replacing a gauge glass before placing it in service?
  • In a condensate return system, what effect does carbon dioxide have?
  • In order to ensure the gauge glass indicates an accurate water level reading, the stationary engineer should:
  • The standard for 1 boiler horsepower (bhp) is based on the evaporation of how many pounds of water from and at 212°F?
  • What ensures safe operation of a steam turbine when reaching critical RPM?
  • What is drilled in the end of a staybolt to warn of corrosion?
  • What can cause incomplete combustion in a boiler?
  • A broken baffle on a water tube boiler would cause a/an _______?
  • What is spalling caused by in a furnace?
  • Who is authorized to make repairs on a safety valve?
  • Extra-heavy pipe must be used on blowdown lines when the steam pressure exceeds what limit?
  • A high CO2 reading in the gases of combustion is a sign of what?
  • What is the accepted practice concerning the pressure when testing a safety valve by hand?
  • To convert 1 lb of water at 212 °F into steam at atmospheric pressure, how many BTUs are needed?
  • A closed feedwater heater is always installed on which side of the feedwater pump?
  • What is defined as balanced draft in a combustion system?
  • What is the first step when using a soot blower?
  • What is the primary function of a flame rod in a gas pilot system?
  • What are the three types of boiler feed water pumps?
  • What is a common component in the combustion process?
  • What is the function of a water column in a boiler?
  • Blowers are normally used with which type of boilers?
  • What might indicate a problem with the gauge glass if it is not displaying the correct water level?
  • Which type of steam turbine allows condensate to be reclaimed for use in the system?
  • A boiler burning fuel oil and using forced draft requires ________ cubic feet of furnace volume per boiler horsepower.
  • What is the proper way to stop a steam turbine when taking it offline?
  • Before lighting off a boiler during a cold startup, what must the operator check first?
  • What type of maintenance does spalling indicate is needed in a furnace?
  • What should be done to correct a low water condition in a boiler?
  • What is always necessary in the combustion process?
  • What does sensible heat refer to?
  • Which type of valve is known to offer the least resistance to flow?
  • What is the primary purpose of economizers in power plants?
  • What could be a consequence of inadequate cooling before boiler maintenance?
  • If a boiler evaporates 50,000 lbs of steam/hour and 10 pounds of steam is evaporated per square foot, what is the heating surface area?
  • A valve that requires five 360° turns of the hand wheel to change from fully open to fully closed is classified as what type of valve?
  • In what units are steam pressure gauges typically calibrated?
  • Combustion efficiency can be increased when air is:
  • What must be monitored to prevent a feed water pump from becoming steam bound?
  • A steam turbine operating at 3600 RPM is set to trip at which RPM?
  • What should always accompany an engaged glass in high pressure boilers to determine water level?
  • What is a primary purpose of using a reducing valve in a steam system?
  • Most furnace explosions are attributed to which failure?
  • What is the primary function of a safety valve on a boiler?
  • A closed feedwater heater is always installed _______.
  • What is required for complete combustion to occur in a boiler?
  • How are oxygen and non-condensable gases typically removed from feed water?
  • According to ASME code, how often should the low water fuel cutoff switch be tested by an evaporation test?
  • What is the primary function of a boiler?
  • If a lather is not obtained when performing a soap hardness test, the water sample is:
  • In a fire tube boiler, the heat and gases of combustion pass through which of the following?
  • The purpose of chemically treating feedwater is to do what?
  • In a surface condenser, what are in direct contact with each other?
  • What is the primary purpose of a vent on the open feedwater heater?
  • What is the purpose of electrostatic precipitators in power plants?
  • What is a common result of not properly treating boiler feedwater?
  • If a boiler is equipped with an automatic non-return valve, it must be located _______?
  • The purpose of a burner pressure control is to _____.
  • A globe valve installed in the feed water line has a pressure from the feed water pump affected in what way?
  • Where are bottom blowdown lines located in relation to a boiler?
  • What is the likely consequence of not following proper boiler operation procedures?
  • In a surface condenser, how does the cooling water circulate?
  • What does a positive pressure reading on a boiler draft gauge indicate?
  • What is the role of a dry pipe separator in a boiler?
  • Before draining a boiler, what should be allowed to cool?
  • What should a valve located between the boiler and water column be?
  • What is the instrument used to measure draft in boilers?
  • An accumulation of snow on the fireside of a boiler tubes does what?
  • What can cause a bag to develop in an HRT boiler?
  • When a quick opening valve is used as a blowdown valve, where is it located?
  • On the feed water line, the valve closest to the boiler shell is a _____ valve.
  • What can cause overheating of tubes on a boiler?
  • Which chemical process occurs when feed water enters the boiler?
  • Why is periodic blowdown necessary in boiler operations?
  • What does viscosity of fuel oil measure?
  • A duplex double-acting reciprocating feed water pump has what ratio of steam pistons to water pistons?
  • If the chimney temperature is 250 degrees Fahrenheit higher than the steam and water temperature, the boiler is ______.
  • What is determined by a Ringelmann test?
  • Overheating of tubes in a water tube boiler results if _______?
  • When the burner is in high fire, what is at its maximum rate?
  • What are some of the functions of combustion controls during burner operation?
  • What is a common purpose of a hydrostatic test?
  • The main purpose of a steam drum in a boiler system is to do what?
  • What is the purpose of a water column in boiler systems?
  • If a boiler is rated at 30,000 lb/hr with a 5% blowdown loss, what is the minimum size feed water pump required to supply this boiler in gal/hr?
  • Water wall tubes serve to protect the refractory and do what else?
  • Where is the feed water stop valve typically located?
  • If the upper connection to a gauge glass is closed, what will the gauge glass show if the boiler has a normal water level?
  • In which units are steam pressure gauges typically calibrated?
  • Which type of boiler can operate at higher pressures?
  • Compared to fire tube boilers, water tube boilers require?
  • A sudden rise in chimney temperature without an increase in load indicates what condition?
  • What should you inspect regularly on a steam boiler system?
  • How does the safety valve setting on the steam and water drum compare to that of a superheater safety valve?
  • During a blowdown, what is the primary purpose of releasing water from the boiler?
  • Why is feed water treated chemically before entering the boiler drum?
  • The most controllable heat loss in a boiler is from the loss of heat in ______.
  • What is true regarding steam and water in a closed feedwater heater?
  • When should water walls be blown down?
  • What effect does oxygen in feed water have on boiler systems?
  • At 0 psi, _______ BTUs are necessary to change 1 lb of water from a liquid at 212°F into steam.
  • As steam pressure in a boiler increases, what also increases alongside steam and water?
  • In a water tube boiler, where does the heat and gases of combustion pass?
  • What is the consequence of not properly sealing the valve between the boiler and the water column?
  • What is steam at a temperature of 350 degrees Fahrenheit and a pressure of 50 psi categorized as?
  • What is the minimum size for a manhole in a boiler?
  • If a low-water condition occurs, the operator should first ______.
  • What does a boiler equipped with a draft gauge and registering a negative pressure indicate?
  • Why is boiler water treatment necessary?
  • A safety valve on a boiler pops at what point in relation to working pressure?
  • How can the low water fuel cutoff be tested?
  • What is the purpose of placing baffles between the tubes of a boiler?
  • What device is tripped to safely conduct an offline process for steam turbines?
  • What is the primary function of the economizer in a steam generating plant?
  • Which of the following is a primary method to reduce emissions from combustion?
  • What is a common indicator of a faulty gauge glass?
  • Which type of gauge glasses are used on boilers with pressures exceeding 250 psi?
  • Water columns are connected to the boiler with a minimum of what pipe size?
  • A manometer is read in:
  • What is the function of a blow-off valve?
  • Why should a boiler be warmed up slowly during startup?
  • When should the overspeed tripping device on a steam turbine be activated?
  • What is the maximum allowable pressure for a safe operation in high-pressure boilers?
  • What happens to the boiling point of water when pressure increases?
  • At 212°F, how much water does one boiler horsepower (bhp) evaporate in one hour?
  • What is the purpose of listing levers on safety valves?
  • What are the three essential components required for combustion?
  • A steam turbine exhaust end and condenser are prevented from excess pressure by ________.
  • Four basic systems found on boilers are ______.
  • If dry saturated steam at 200 PSI is reduced to 25 psi, what type of steam is it?
  • What should the steam inlet connections of a condenser have for safety?
  • What is the purpose of a dry pipe separator in a steam system?
  • What characteristic easily identifies a Scotch Marine boiler?
  • According to ASME code, what type of safety valve is allowed on a boiler?
  • A continuous blowdown line is located:
  • During a boiler inspection, what status should the main steam stop valves be in?
  • The steam line going to the blowers is connected to the main what?
  • A steam pressure gauge must have a range of at least how much in comparison to the MAWP?
  • What action should be taken if oil viscosity needs to be decreased for better flow?
  • What type of steam generation system allows for high pressure operation?
  • Where are sup blowers most commonly found?
  • What prevents condensate from backing up into the steam line on a deaerator?
  • Which component helps maintain proper air flow in boiler systems?
  • What does a low-water cutoff device do?
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