Bailers Exam New 2024 Latest Version Best Studying Material with All Questions, Exams of Food science

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A two-element feedwater regulator controls the feedwater by measuring the water level in the boiler and the ___. ---------- Correct Answer ----------- steam flow out of the boiler How long can your license be expired before it is null and void? ---------- Correct Answer ---------- 3 years If blow down excessively, what happens ---------- Correct Answer ---------- Excessive loss of heat Mechanical draft is controlled by outside air dampers and ______? ---------- Correct Answer ----------- speed of fan when blowing off or lancing a boiler it should be cold why? ---------- Correct Answer ------ ----- this will avoid dust explosion what is a micro processor burner control system ---------- Correct Answer ----------- Maintains combustion safety How do you remove oxygen from boiler water? ---------- Correct Answer ---------- by heating feed water and using sodium sulfite A low pressure steam boiler has an MAWP of how many pounds per square inch? ------- --- Correct Answer ---------- 15 A ___-type low-water fuel cutoff consists of a cylindrical object that is immersed in the water and connected to a spring or torsion device that twists in response to the weight of the cylinder. ---------- Correct Answer ----------- displacer A ___ is a set of tubes that is placed in the furnace area of watertube boilers and used to increase the heating surface of boilers and the service life of refractory. ---------- Correct Answer ----------- waterwall A ___ boiler comes completely assembled, with its own pressure vessel, burner, draft fans, and fuel train. ---------- Correct Answer ----------- package Boiler plates and stays are subjected to ___ stress. ---------- Correct Answer ----------- tensile Cast iron can be used for pressures up to ___ psi. ---------- Correct Answer ----------- 250

A one-element feedwater regulator is a feedwater regulator that regulates the amount of feedwater by measuring the ___. ---------- Correct Answer ----------- water level in the boiler ___ are effective when there are sudden fluctuations in the steam load and in boilers equipped with economizers where there is a considerable drop in feedwater pressure. -- -------- Correct Answer ----------- Three-element feedwater regulators A(n) ___ heats feedwater by passing it through a heat exchanger placed in the path of the gases of combustion. ---------- Correct Answer ----------- economizer As feedwater is heated, scale-forming salts start to settle out at about ___°F. ---------- Correct Answer ----------- 150 A(n) ___ feedwater heater is a feedwater heater in which steam and feedwater mix with each other. ---------- Correct Answer ----------- open With a(n) ___, heat that would normally be lost up the stack is reclaimed to preheat the feedwater. ---------- Correct Answer ----------- economizer A closed feedwater heater is normally equipped with a ___ to protect the shell from excessive pressure. ---------- Correct Answer ----------- safety valve A high water level in a feedwater heater can allow water to enter the steam or condensate lines and cause ___. ---------- Correct Answer ----------- water hammer Soot retards heat transfer because it ___. ---------- Correct Answer ----------- insulates the surface of the economizer The theory of operation of a centrifugal pump is that the centrifugal force of a rotating element ___. ---------- Correct Answer ----------- is converted into pressure The feedwater stop valve on a feedwater line is located closest to the shell of the boiler so that the ___. ---------- Correct Answer ----------- check valve can be repaired without taking the boiler off-line A variable-speed drive is a motor controller used to vary the ___ supplied to an AC motor in order to control its rotational speed. ---------- Correct Answer ----------- electrical frequency The ASME Code states that boilers having over ___ sq ft of boiler heating surface must have at least two means of supplying feedwater to the boiler. ---------- Correct Answer --- -------- 500 A ___ valve must be installed so that the pressure from the feedwater pump is under the seat of the valve. ---------- Correct Answer ----------- globe

Each stage of a multiple-stage centrifugal pump has ___. ---------- Correct Answer -------- --- a single impeller Turbine pumps must be equipped with a relief valve on the discharge line to protect the pump from ___. ---------- Correct Answer ----------- excessive pressure Typical applications for ___ in boiler feedwater pumps and deaerator systems include continuously running centrifugal pump applications where the motor horsepower is 15 HP and greater. ---------- Correct Answer ----------- variable-speed drives CHAPTER 6 ---------- Correct Answer ----------- Boiler water with a low pH can cause ___. ---------- Correct Answer ----------- acidic corrosion ___ is the accumulation of compounds such as calcium carbonate on the water side of the heating surfaces of a boiler. ---------- Correct Answer ----------- Scale ___ dissolves in condensate and forms carbonic acid, which can cause corrosion. ------- --- Correct Answer ----------- Carbon dioxide The total dissolved solids in water can be measured with a ___. ---------- Correct Answer ----------- conductivity meter ___ is the rapid fluctuation of the water level that occurs when steam bubbles are trapped below a film of impurities on the surface of the boiler water. ---------- Correct Answer ----------- Foaming A pH of ___ is neutral. ---------- Correct Answer ----------- 7 At a minimum, steam systems require ___ water analysis. ---------- Correct Answer ------- ---- monthly ___ is a filtration process in which water is pressurized and pressed against the surface of a semipermeable membrane. ---------- Correct Answer ----------- Reverse osmosis ___ is a process in which the chemicals added to raw water cause suspended solids to adhere to each other, making them larger and heavier and causing them to settle out of solution. ---------- Correct Answer ----------- Coagulation An ion-exchange softener uses an ion-exchange ___ to exchange a sodium ion for an ion that causes hardness. ---------- Correct Answer ----------- resin A lime-soda softener uses lime and soda ash to reduce dissolved ___, magnesium, and silica. ---------- Correct Answer ----------- calcium

A ___ is an internal element in some types of deaerators that condenses steam and uses the heat produced to warm the feedwater. ---------- Correct Answer ----------- vent condenser A hot ___ softener is used above 212°F and is also known as a hot process water softener. ---------- Correct Answer ----------- lime-soda A(n) ___ is a positively charged ion. ---------- Correct Answer ----------- cation Demineralization of makeup water is necessary for boilers operating above ___ psi. ----- ----- Correct Answer ----------- 1000 A(n) ___ is an ion-exchange conditioner that removes impurities from condensate. ------- --- Correct Answer ----------- condensate polisher A boiler operator is generally responsible for verifying that the water leaving a deaerator is free of ___. ---------- Correct Answer ----------- oxygen ___ are generally added to boiler water to protect the condensate lines from carbonic acid. ---------- Correct Answer ----------- Amines A ___ blowdown system includes a conductivity sensor inserted into the boiler water, a controller, and a modulating blowdown valve. ---------- Correct Answer ----------- concentration-controlled Sodium sulfite is added to feedwater to remove remaining ___ to prevent pitting of the boiler metal. ---------- Correct Answer ----------- oxygen A ___ is a vented tank that cools blowdown water and steam to protect sewer lines. ----- ----- Correct Answer ----------- blowdown tank A boiler should be blown down at least once every ___, regardless of the analysis results. ---------- Correct Answer ----------- 24 hr ___ blowdown is the process of removing water from a boiler near the NOWL to control the quantity of impurities in the remaining water or to remove a film of impurities on the surface of the water. ---------- Correct Answer ----------- Surface ___ steam is the steam created when water at a high temperature experiences a sudden drop in pressure. ---------- Correct Answer ----------- Flash A(n) ___ tank is a tank used with a continuous blowdown system to recover the flash steam from the water being removed during blowdown. ---------- Correct Answer ----------

• flash

CHAPTER 7 ---------- Correct Answer ----------- ___ specify leak detection and monitoring requirements for fuel oil tanks to ensure there is no ground or water contamination. ---------- Correct Answer ----------- EPA regulations Soot blowers are mainly found on ___. ---------- Correct Answer ----------- watertube boilers With an air atomizing fuel oil burner, the mixture of air and fuel oil passes through a ___ that causes it to spin into the combustion chamber. ---------- Correct Answer ----------- register A ___ is installed after a fuel oil heater to protect against excessive fuel oil pressure. ---- ------ Correct Answer ----------- safety relief valve ___ protection of underground storage tanks uses the flow of electrical current to protect against corrosion. ---------- Correct Answer ----------- Cathodic Soot should be ___. ---------- Correct Answer ----------- removed from boiler tubes for better heat transfer Both plug-and-tip and sprayer plate atomizers require fuel oil pressures of ___ psi or higher for atomization. ---------- Correct Answer ----------- 100 A ___ located at the end of a burner assembly is used to help mix air and fuel. ---------- Correct Answer ----------- diffuser A(n) ___ is a tank and any underground piping connected to the tank that has at least 10% of its combined volume underground. ---------- Correct Answer ----------- underground storage tank (UST) A large pressure drop across a strainer indicates that ___. ---------- Correct Answer ------ ----- the strainer is dirty The purpose of a low-gas-pressure switch is to ___. ---------- Correct Answer ----------- prevent the gas system from operating when the gas pressure is low A gas-pressure regulator consists of a ___ connected to a globe valve with an opposing adjustable spring. ---------- Correct Answer ----------- diaphragm A ___ has a rotating impeller in a housing that throws the air to its outer edge. ---------- Correct Answer ----------- centrifugal blower By adjusting the spring tension, a ___ can be used to change the gas pressure at the burner. ---------- Correct Answer ----------- gas-pressure regulator

In a gas burner, a ___ is a formed sheet-metal plate with slots where the metal is bent on an angle. ---------- Correct Answer ----------- register A manual reset valve is a ___ valve that remains open as long as the electrical coil is energized. ---------- Correct Answer ----------- solenoid A ___ controls the volume of gas going to a burner. ---------- Correct Answer ----------- butterfly gas valve When using pulverized coal, a boiler must have ___. ---------- Correct Answer ----------- a negative pressure in the furnace Pulverized coal is normally burned ___. ---------- Correct Answer ----------- in suspension A fluidized-bed boiler can burn coal with ___ content without requiring expensive flue- gas treatment. ---------- Correct Answer ----------- high sulfur A(n) ___ feeds coal into a boiler in suspension and on a grate. ---------- Correct Answer - ---------- spreader stoker ___ is noncombustible components of coal that melt and fuse together during combustion. ---------- Correct Answer ----------- Clinker ___ is relatively small ash particles that are light enough to be suspended in a combustible gas stream and carried through a boiler. ---------- Correct Answer ----------- Fly ash Coal is burned in suspension and requires a furnace temperature of approximately ___°F to achieve complete combustion. ---------- Correct Answer ----------- 3000 Spreader stokers operate with ___. ---------- Correct Answer ----------- a very thin fuel bed CHAPTER 8 ---------- Correct Answer ----------- The viscosity of fuel oil is normally reported as the ___ viscosity. ---------- Correct Answer ----------- Saybolt A ___ is a unit used to measure the heat content of natural gas and is equal to 100, Btu. ---------- Correct Answer ----------- therm ___ coal, commonly known as hard coal, contains a high percentage of fixed carbon and a low percentage of volatile matter. ---------- Correct Answer ----------- Anthracite Natural gas is a combustible gas that consists mainly of ___ with small quantities of ethylene, hydrogen, and other gases. ---------- Correct Answer ----------- methane

No. ___ fuel normally needs to be preheated before use. ---------- Correct Answer -------- --- 6 A British thermal unit (Btu) is a measurement of the quantity of heat required to raise the temperature of ___ of water by 1°F. ---------- Correct Answer ----------- 1 lb The fuel oils most commonly used in high pressure boilers include ___. ---------- Correct Answer ----------- No. 2 and No. 6 ___ point is the lowest temperature at which a liquid will flow from one container to another. ---------- Correct Answer ----------- Pour Because of the large volume of water, the boiler type most likely to cause a boiler explosion is a ___ boiler. ---------- Correct Answer ----------- firetube The part of a boiler with the heat and gases of combustion on one side and water on the other side is known as the ___ surface. ---------- Correct Answer ----------- heating ___ is the pressure at which the density of water and steam are the same. ---------- Correct Answer ----------- Critical pressure An electric boiler produces heat using electrodes or ___. ---------- Correct Answer -------- --- resistance coils Boiler horsepower (BHP) is the amount of energy equal to the evaporation of ___ lb/hr of water from and at a feedwater temperature of 212°F. ---------- Correct Answer ----------

A high pressure steam boiler operates at a steam pressure of more than ___ psi. ---------

• Correct Answer ----------- 15 A ___ results in a higher boiling point for water in a boiler. ---------- Correct Answer ------- ---- higher steam pressure A(n) ___ is a boiler that uses heat recovered from a hot gas stream, such as hot exhaust gases from a kiln or from a gas turbine. ---------- Correct Answer ----------- heat recovery steam generator (HRSG) A ___ is the lowest part of the water side of a watertube boiler. ---------- Correct Answer ----------- mud drum By increasing the number of passes and the number of fire tubes, water can absorb more heat and ___ increases. ---------- Correct Answer ----------- thermal efficiency

The steam drum of watertube boilers is dished (concave) to eliminate the need for ___. ---------- Correct Answer ----------- stays ___ stress occurs when two forces of equal intensity act from opposite directions and push toward the center of an object. ---------- Correct Answer ----------- Compressive ___ are used to direct the gases of combustion so that they come in close contact with the boiler heating surface. ---------- Correct Answer ----------- Baffles ___ are used to prevent bulging in boilers. ---------- Correct Answer ----------- Through stays A ___ converts the energy from the expansion of high-pressure steam into the mechanical energy of rotation. ---------- Correct Answer ----------- turbine A ___ is a device that converts mechanical energy into electrical energy. ---------- Correct Answer ----------- generator Cogeneration is the process of ___ and then using the waste heat for heating buildings, providing process heat, or further electrical generation. ---------- Correct Answer ----------- generating electricity Food processing plants use steam for ___, pasteurization, and sterilization. ---------- Correct Answer ----------- cooking ___ is the production of electricity as a result of a conductor passing through a magnetic field. ---------- Correct Answer ----------- Electromagnetic induction ___ generators are the most common generators used to produce electrical power. ------ ---- Correct Answer ----------- AC ___ is often used as a prime mover that is used to rotate turbines to generate electricity. ---------- Correct Answer ----------- High-pressure steam Exhaust gases from engines and turbines pass through a heat exchanger to produce hot water or steam for use in plant heating or processes in ___ plants. ---------- Correct Answer ----------- combined heat and power (CHP) CHAPTER 2 ---------- Correct Answer ----------- ___ are used for steam loads that require dry steam. ---------- Correct Answer ----------- Superheaters A ___ can be installed at the point of use to reduce the steam pressure to the pressure needed for the load. ---------- Correct Answer ----------- pressure-reducing station

A ___ is used to send condensate back to the condensate return. ---------- Correct Answer ----------- steam trap Feedwater flows into a boiler to be heated by ___. ---------- Correct Answer ----------- gases of combustion Each steam load device has one or more ___ valves that allow the load device to be taken out of service for repairs. ---------- Correct Answer ----------- isolation It takes ___ lb of water to produce 1 lb of steam. ---------- Correct Answer ----------- 1. A deaerator tank is located above the feedwater pumps so that the water is supplied to the pumps ___. ---------- Correct Answer ----------- at a positive pressure In the deaerator tank, noncondensable gases are separated and directed to the atmosphere through a ___. ---------- Correct Answer ----------- vent Feedwater can be pumped through a ___ where it is heated to a relatively high temperature by the gases of combustion. ---------- Correct Answer ----------- closed feedwater heater In the deaerator tank, a ___ to add makeup water to the deaerator tank to compensate for the condensate lost. ---------- Correct Answer ----------- float opens a feed valve A shutoff valve is used when ___. ---------- Correct Answer ----------- making repairs On larger watertube boilers, a(n) ___ can heat the feedwater by using gases of combustion before the feedwater enters the boiler. ---------- Correct Answer ----------- economizer Once fuel oil reaches the burner, it is the function of the burner to ___ the oil so it can mix with air and burn. ---------- Correct Answer ----------- atomize In a low-pressure gas system, the zero gas governor reduces the pressure of the gas to ___ psi. ---------- Correct Answer ----------- 0 In a low-pressure gas system, the air and gas mixture in the furnace is ignited by the ___. ---------- Correct Answer ----------- pilot Modern coal plants use ___ coal that is blown into the combustion chamber where it burns in suspension. ---------- Correct Answer ----------- pulverized ___ valves are typically slow-opening, fast-closing, hydraulic-electric valves and should have an internal proof-of-closure switch. ---------- Correct Answer ----------- Safety shutoff

A(n) ___ is used to clean fuel oil before it goes to a burner. ---------- Correct Answer ----- ------ strainer Stop valves isolate a tank when ___. ---------- Correct Answer ----------- it is not in use Most steam plants that use No. ___ fuel oil have two tanks. ---------- Correct Answer ----- ------ 6 In a basic pulverized coal system, the coal ___ stores the coal before it flows onto the coal conveyor. ---------- Correct Answer ----------- bunker ___ draft results from temperature differences between air and gases of combustion and is produced with a stack only. ---------- Correct Answer ----------- Natural The amount of draft in a(n) ___ draft system can be increased by a taller stack. ---------- Correct Answer ----------- natural ___ draft systems are often used in large steam plants such as those in central heating plants, large industrial boilers, or utility boilers. ---------- Correct Answer ----------- Combination In combination draft systems, ambient air is drawn through the ___ into the forced draft fan and is discharged into the boiler where combustion occurs. ---------- Correct Answer ----------- preheater CHAPTER 3 ---------- Correct Answer ----------- The setting or adjusting of a safety valve should only be done by a ___. ---------- Correct Answer ----------- qualified person who is familiar with the construction and operation of the safety valve The ___ is the operating pressure of a boiler as determined by the design and construction of the boiler in conformance with the ASME Code. ---------- Correct Answer ----------- maximum allowable working pressure The safety valve on a boiler must be capable of discharging all the steam the boiler can generate without the pressure increasing more than ___ above the MAWP. ---------- Correct Answer ----------- 6% A(n) ___ test is a safety valve test performed to determine if a safety valve opens at the correct pressure. ---------- Correct Answer ----------- pop A fitting is a ___ and is required for the operation of the boiler. ---------- Correct Answer - ---------- component directly attached to a boiler

Steam boilers having more than ___ sq ft of heating surface require two or more safety valves. ---------- Correct Answer ----------- 500 ___ is the predetermined pressure at which a safety valve opens and remains open until the pressure drops. ---------- Correct Answer ----------- Popping pressure Electric boilers exceeding ___ kW of input require two safety valves. ---------- Correct Answer ----------- 500 Drains are placed at the lower section of safety valve discharge piping to ___. ---------- Correct Answer ----------- remove any condensation that may form A(n) ___ test is used to establish the relief capacity of boiler safety valves. ---------- Correct Answer ----------- accumulation The ___ is the part on a safety valve that increases the area of the safety valve disc to increase the total force. ---------- Correct Answer ----------- huddling chamber Safety valve ___ is a drop in pressure between popping pressure and reseating pressure as a safety valve relieves boiler overpressure. ---------- Correct Answer ----------

• blowdown Boiler safety valves are placed ___ of the boiler. ---------- Correct Answer ----------- at the highest part of the steam space The safety valve ___ is the amount of steam that can be relieved by a safety valve. ------ ---- Correct Answer ----------- capacity The boiler vent is located at the ___. ---------- Correct Answer ----------- highest part of the steam side of the boiler Cyclone separators are used to ___. ---------- Correct Answer ----------- separate water droplets from steam The ASME code will allow an automatic nonreturn valve to be used in place of one of the main steam stop valves. If a nonreturn valve is used, it must be ___. ---------- Correct Answer ----------- located between the main steam stop valve and boiler shell When cutting a boiler equipped with hand-operated main steam stop valves in on-line, the steam pressure on the incoming boiler ___. ---------- Correct Answer ----------- should be slightly lower than line pressure A ___ valve should be used as the main steam stop valve. ---------- Correct Answer ------ ----- gate

A steam separator is used to improve the quality of steam in order to ___. ---------- Correct Answer ----------- prevent damage from water hammer Hydrostatic pressure is caused by ___. ---------- Correct Answer ----------- the weight of a column of water A(n) ___ is located at the lowest part of the water side of a firetube boiler or the mud drum of a watertube boiler so that sludge and sediment can be removed from the bottom of the boiler. ---------- Correct Answer ----------- bottom blowdown valve A steam pressure gauge must be protected by a(n) ___ to prevent steam from damaging the gauge. ---------- Correct Answer ----------- steam siphon CHAPTER 4 ---------- Correct Answer ----------- Saturated steam is steam that is ___. ---------- Correct Answer ----------- in equilibrium with water at the same temperature and pressure When steam is superheated, the temperature ___. ---------- Correct Answer ----------- increases with no change in pressure Superheater tubes are protected from warping or burning out by the ___. ---------- Correct Answer ----------- continuous flow of steam Steam impinging on boiler tubes would ___. ---------- Correct Answer ----------- cause erosion of the lines and fittings Steam quality is the ratio of dry steam to the total amount of ___. ---------- Correct Answer ----------- water evaporated A(n) ___ may be a simple bend or a set of elbows that allow the pipe to move slightly. -- -------- Correct Answer ----------- expansion bend The flow of steam through a superheater should never be less than ___% of boiler capacity. ---------- Correct Answer ----------- 25 A(n) ___ injects feedwater into a superheated steam line to reduce the steam temperature. ---------- Correct Answer ----------- line desuperheater With a condensing steam turbine, a low exhaust pressure allows the steam to ___. ------ ---- Correct Answer ----------- release more heat A noncondensing steam turbine ___. ---------- Correct Answer ----------- is normally used in a plant that requires low pressure steam

Impulse steam turbines may contain many sets of revolving blades that ___. ---------- Correct Answer ----------- are divided into stages ___ is a method in which the energy from steam is extracted using multiple stages in a turbine to reduce the steam velocity and pressure in a short time. ---------- Correct Answer ----------- Velocity compounding The pressure drop incurred in an impulse turbine is through the ___. ---------- Correct Answer ----------- nozzles A ___ automatically removes air and condensate from steam lines. ---------- Correct Answer ----------- steam trap The bellows in a thermostatic steam trap is typically filled with ___. ---------- Correct Answer ----------- an alcohol and water solution With a float thermostatic steam trap, the thermostatic element opens and closes only to discharge ___. ---------- Correct Answer ----------- air A thermodynamic steam trap has a ___ that rises to allow the discharge of air and cool condensate. ---------- Correct Answer ----------- single movable disc The sound method of testing a steam trap uses a(n) ___ to listen for steam flow. ---------

• Correct Answer ----------- ultrasonic device Steam separators have barriers placed in the path of the wet steam flow that cause the steam to ___. ---------- Correct Answer ----------- change direction The latest method of testing steam traps uses a sensor fitted inside a sensing chamber to detect the presence of steam or condensate by measuring its ___. ---------- Correct Answer ----------- conductivity A(n) ___ is a steam system accessory that collects condensate returned from the point where steam is used. ---------- Correct Answer ----------- condensate return tank A(n) ___ is used in larger steam boiler plants where there are many sources from which condensate returns to the boiler room. ---------- Correct Answer ----------- condensate surge tank Normally, a surge tank is fitted with ___ along with the transfer pumps and controls. ----- ----- Correct Answer ----------- makeup water fittings Transfer pumps are used to transfer the ___ to the deaerator or directly to the boiler feedwater pumps. ---------- Correct Answer ----------- mixture of condensate and raw makeup water

A gauge glass may be attached to a condensate tank and used to ___. ---------- Correct Answer ----------- indicate the level of condensate CHAPTER 5 ---------- Correct Answer ----------- The main purpose of a water column is to ___. ---------- Correct Answer ----------- reduce turbulence in the gauge glass to get a more accurate reading of the water level in the boiler A low-water fuel cutoff ___ in the event of a low-water condition. ---------- Correct Answer ----------- secures the burner The water column and gauge glass should be blown down at least ___ or whenever the water level is in doubt. ---------- Correct Answer ----------- once every shift An auxiliary low-water fuel cutoff is installed ___. ---------- Correct Answer ----------- slightly below the primary low-water fuel cutoff ___ is a process in which the water level in a boiler momentarily rises with an increase in steam demand. ---------- Correct Answer ----------- Swell Coal rank refers to the ___ of coal. ---------- Correct Answer ----------- hardness ___ gas is gas produced by the biological breakdown of organic matter in the absence of oxygen. ---------- Correct Answer ----------- Digester ___ combustion occurs when all the fuel is burned using a minimum amount of excess air. ---------- Correct Answer ----------- Complete In combustion, fuel combines with the ___ in the air to form carbon dioxide, water, and traces of other compounds. ---------- Correct Answer ----------- oxygen The letter "M" in the acronym MATT stands for ___. ---------- Correct Answer ----------- mixture Reducing excess air while still completely burning a fuel ___. ---------- Correct Answer --- -------- decreases the heat lost to the atmosphere ___ air is air supplied to the boiler that is more than the theoretical amount of air needed for combustion. ---------- Correct Answer ----------- Excess With incomplete combustion, some of the carbon in the fuel forms ___ instead of carbon dioxide. ---------- Correct Answer ----------- carbon monoxide Oxygen in the gases of combustion indicates ___. ---------- Correct Answer ----------- excess air

Furnace ___ is the amount of space available in a furnace where the fuel can burn before it comes in contact with the boiler heating surface. ---------- Correct Answer -------- --- volume CHAPTER 9 ---------- Correct Answer ----------- A ___ is a system programmed for automatic burner sequencing to ensure safe burner operation. ---------- Correct Answer ----------- burner management system ___ occurs before a burner is allowed to light the pilot. ---------- Correct Answer ----------- Pre-purge A common preignition check includes ___. ---------- Correct Answer ----------- ensuring that the fuel valves are closed A(n) ___ is a device in a flame scanner that generates a small amount of electrical current when exposed to visible light. ---------- Correct Answer ----------- photocell If there is a ___ while a burner is firing, the burner management system shuts down the burner. ---------- Correct Answer ----------- flame failure A purge cycle is used to remove ___ from a furnace. ---------- Correct Answer ----------- combustible vapors A(n) ___ is a sensing device in a flame scanner that generates a small electric current when one end of the sensor is placed directly in a flame. ---------- Correct Answer --------- -- flame rod Proving the main flame requires that the flame scanner be properly positioned to be able to sense ___. ---------- Correct Answer ----------- both the pilot and main flame ___ is the most common measurement used to determine the balance between steam generation and use. ---------- Correct Answer ----------- Steam pressure Parallel positioning is a modulating control strategy that uses steam pressure as the input signal and outputs one signal to a ___ and another signal to a blower motor or air damper. ---------- Correct Answer ----------- fuel valve Oxygen trim is a control strategy used to adjust the ___ of a burner according to the results from a flue gas oxygen analyzer. ---------- Correct Answer ----------- air-fuel ratio A variable-speed drive (VSD) is a motor controller used to vary the ___ of the electrical signal supplied to an AC motor in order to control its rotational speed. ---------- Correct Answer ----------- frequency

___ control is used to stop and start a burner without any modulation of the flame. ------- --- Correct Answer ----------- ON/OFF A(n) ___ signal consists of binary (ON/OFF) signals in the form of low-voltage DC pulses sent over a network. ---------- Correct Answer ----------- digital Cross-limited control increases safety by adding a linking system that ___ during load changes. ---------- Correct Answer ----------- prevents the airflow from going too low for the amount of fuel flow A modulating control system is used to adjust the firing rate to a degree that is proportional to the ___. ---------- Correct Answer ----------- steam load CHAPTER 10 ---------- Correct Answer ----------- Natural draft is controlled by ___. ---------- Correct Answer ----------- dampers ___ draft is produced by a blower supplying air to a furnace. ---------- Correct Answer ---- ------- Forced When using forced draft, the pressure inside the furnace is ___. ---------- Correct Answer ----------- more than atmospheric pressure Draft is the ___ through a boiler. ---------- Correct Answer ----------- flow of air or gases of combustion A ___ is a chamber surrounding a burner assembly or coal stoker that allows pressurized air to enter the burner. ---------- Correct Answer ----------- wind box The unit used to measure draft is ___. ---------- Correct Answer ----------- in. WC Induced draft fans remove gases of combustion and prevent ___ from developing. ------- --- Correct Answer ----------- back pressure ___ are located at the outlet side of a boiler in the breeching. ---------- Correct Answer --- -------- Outlet dampers Draft must be proportional to ___ for proper operation and efficient fuel consumption. --- ------- Correct Answer ----------- fuel flow An air heater uses heat from the gases of combustion to heat the ___. ---------- Correct Answer ----------- combustion air before it mixes with the fuel A VSD adjusts blower speed to maintain the correct amount of air ___ without wasting energy because of dampers that restrict flow. ---------- Correct Answer ----------- for the amount of fuel used

The purpose of using an air heater is to improve efficiency by ___. ---------- Correct Answer ----------- preheating combustion air A ___ draft system typically consists of a forced draft fan, an air heater, a windbox under the chain grate, an economizer, and an induced draft fan. ---------- Correct Answer ----------- chain grate stoker Cold air entering a furnace can cause ___ in the brickwork of a furnace. ---------- Correct Answer ----------- spalling In a pulverized coal draft system, the air from the forced draft fan that flows to the air- tempering damper blends with ambient air to maintain an air temperature of about ___°F. ---------- Correct Answer ----------- 200 Mercury is released into the environment when ___. ---------- Correct Answer ----------- coal is burned A(n) ___ facility emits 10 or more tons per year of any single HAP or 25 tons or more per year of any combination of HAPs. ---------- Correct Answer ----------- major source ___ is a type of PM consisting of noncombustible material found in the gases of combustion. ---------- Correct Answer ----------- Fly ash NAAQS include ___ criteria pollutants of concern. ---------- Correct Answer ----------- 6 ___ is not produced directly from the combustion process. ---------- Correct Answer ------ ----- Ozone The EPA established the ___ to regulate HAPs. ---------- Correct Answer ----------- NESHAP ___ is technology that meets the environmental requirement for emissions from an existing source in a nonattainment area. ---------- Correct Answer ----------- RACT A(n) ___ is a device that removes PM from the gases of combustion using electric charge. ---------- Correct Answer ----------- electrostatic precipitator ___ is an emissions control method in which flue gases are recirculated back through the burner to reduce the furnace temperature. ---------- Correct Answer ----------- FGR ___ is the method of choice for removing sulfur oxides from emissions from coal-fired plants. ---------- Correct Answer ----------- Scrubbing Minimum size piping of a water column? ---------- Correct Answer ---------- 1"

Minimun size bottom blowdown on a boiler? ---------- Correct Answer ---------- 1" Maximun size bottom blowdown on a boiler? ---------- Correct Answer ---------- 2.5" What does CO2 stand for? ---------- Correct Answer ---------- Carbon dioxide What does CO stand for? ---------- Correct Answer ---------- Carbon monoxide What indicates incomplete combustion? ---------- Correct Answer ---------- CO-not enough air What ASME section do Special High Boilers fall under? ---------- Correct Answer ---------- Section 1 A common type of flame failure will utilize? ---------- Correct Answer ---------- Light sensitivity Where would you obtain a boiler registration certificate? ---------- Correct Answer ---------

• Department of Labor & Workforce Development What is the most accurate way of checking the water level in a boiler? ---------- Correct Answer ---------- Sight glass water level gauge How can you check the gauge glass level? ---------- Correct Answer ---------- By blowing down glass Who must you notify when you weld a boiler? ---------- Correct Answer ---------- Boiler Inspector Repaired steam leaks will? ---------- Correct Answer ---------- Reduce load on boiler What letter stamp does a high pressure boiler use? ---------- Correct Answer ---------- S One boiler horsepower is equal to? ---------- Correct Answer ---------- 34.5 LBS. steam per hour Minimum horsepower needed to obtain a special boilers license? ---------- Correct Answer ---------- 6 Horsepower Maximun horsepower a special(white seal) operator can operate up to? ---------- Correct Answer ---------- 100 Horsepower (over 6 & unto 100hp) What does oxygen cause? ---------- Correct Answer ---------- Pitting When starting up a cold boiler, it is important to vent all air from the steam space in order prevent? ---------- Correct Answer ---------- Water hammer

How often do you test a low water cut off? ---------- Correct Answer ---------- Daily by blowing down the column How do you test a low water cut off ---------- Correct Answer ---------- By blowing down the column How often do you blow down the bottom of your boiler with no chemical analysis? -------- -- Correct Answer ---------- Once every 24 hours How often are boilers inspected? ---------- Correct Answer ---------- Annually What valve allows flow in one direction? ---------- Correct Answer ---------- Check valve What valve prevents reverse flow? ---------- Correct Answer ---------- Check valve What is the function of the flame failure cut out device? ---------- Correct Answer ---------- Shut off fuel supply What valve is allowed between the safety valve and the boiler? ---------- Correct Answer ---------- None(no valve) How does a rotary cup burner atomize fuel? ---------- Correct Answer ---------- By use of a spinning cup & high velocity air What device measures draft? ---------- Correct Answer ---------- Manometer What is the purpose of a boiler certificate? ---------- Correct Answer ---------- Prove inspection status Air must be removed from the boiler to prevent? ---------- Correct Answer ---------- Corrosion The main purpose of testing a safety valve is to? ---------- Correct Answer ---------- Make sure valve operates freely When testing a safety valve by hand you must? ---------- Correct Answer ---------- Have at least 75% of popping pressure How often do you test a safety valve? ---------- Correct Answer ---------- Monthly, under pressure Should a safety valve be tested while under pressure? ---------- Correct Answer ---------- Yes

What automatically puts water into a boiler? ---------- Correct Answer ---------- Automatic feed water regulator What does a feed water regulator do? ---------- Correct Answer ---------- It automatically feeds water into boiler What stamp is needed for a weld repair? ---------- Correct Answer ---------- R What is the R for? ---------- Correct Answer ---------- Its the stamp needed for a weld repair Who can adjust a safety valve? ---------- Correct Answer ---------- Manufacture's Representative Can anybody adjust a safety valve? ---------- Correct Answer ---------- NO, a manufacture's representative has to do it What is the main feature of a NJ safety valve? ---------- Correct Answer ---------- Automatically relieves pressure and is actuated by pressure upstream of the valve How are the safety valves? ---------- Correct Answer ---------- they are spring loaded pop type(pop open) What protects a team coil on a special boiler from coil burn out? ---------- Correct Answer ---------- Main temperature limit control What does the main temperature limit control do? ---------- Correct Answer ---------- Protect the coil from burning out What protects a steam gauge from live steam? ---------- Correct Answer ---------- Pigtail or siphon loop Siphon loop or pig tail? ---------- Correct Answer ---------- Protect the pressure gauge from the effect of hot pressure media such as steam What happens when a steam trap continuously blows through? ---------- Correct Answer ---------- Steam returns back to condensate vent Steam Trap? ---------- Correct Answer ---------- Is a device used to discharge condensates and non-condensable gases What is the most important fitting on a boiler? ---------- Correct Answer ---------- The safety valve What is the typical stack temperature on a high pressure coil unit? ---------- Correct Answer ---------- 350F to 450F

What does oxygen in a boiler feed water cause? ---------- Correct Answer ---------- Pitting(corrosion) Where do you find the water in a coil boiler? ---------- Correct Answer ---------- In the coils What safety devices are electronically connected to the fuel solenoid valve? ---------- Correct Answer ---------- Low water cut off-flame scanner or flame rod solenoid valve ---------- Correct Answer ---------- regulates the opening of fluid flow in a valve What is the fine for operating without a license? ---------- Correct Answer ---------- $5,000 What is the main advantage of a coil high pressure boiler? ---------- Correct Answer ------ ---- Rapid steam pressure What is boiler priming? ---------- Correct Answer ---------- Water is high and carrying over with steam Boiler vent location? ---------- Correct Answer ---------- Highest part of steam side boiler A furnace explosion can best be avoided by? ---------- Correct Answer ---------- Purging the boiler What does purging do? ---------- Correct Answer ---------- gets the air out so the water can run freely. What does air bubbles do? ---------- Correct Answer ---------- Air bubbles stop water flow If a boiler had work done to it, what test should be done? ---------- Correct Answer -------- -- Hydrostatic test At what pressure do you perform a hydrostatic test? ---------- Correct Answer ---------- 1.5 times working pressure Hydrostatic test ---------- Correct Answer ---------- is a way in which pressure vessels such as boilers and fuel tanks can be tested for strength and leaks. Proper water level is obtained in a boiler and maintained with what device? ---------- Correct Answer ---------- Automatic feed water regulator Automatic feed water regulator? ---------- Correct Answer ---------- Is a valve installed in conjunction with the boiler to ensure the water is maintained at the desired level.

On high pressure boilers, the water column is used in order to? ---------- Correct Answer ---------- Dampen the oscillation of the water in the gauge glass(to get the best water level reading) What does a pneumercator do? ---------- Correct Answer ---------- Measures liquids in a tank Too much excess air will cause? ---------- Correct Answer ---------- Heat loss to the atmosphere A flame failure cut out automatically? ---------- Correct Answer ---------- Breaks the cycle on a flame out what safety device cuts off fuel supply in the event of loss of ignition? ---------- Correct Answer ---------- Flame scanner-Fire eye Where does the fuel atomize? ---------- Correct Answer ---------- at the burner tip The more a boiler is blown down ---------- Correct Answer ---------- The more heat will be discharged Minimun fine for operating without a license? ---------- Correct Answer ---------- $500 If you install a new glass on a gauge glass, how do you return it to service? ---------- Correct Answer ---------- Open the drain and crack open the top valve How many square feet heating surface requires inspection? ---------- Correct Answer ---- ------ 10 square feet Failure of what device causes a furnace explosion? ---------- Correct Answer ---------- Fan failure or purge failure When does purge occur? ---------- Correct Answer ---------- On start up & shut down What is purge? ---------- Correct Answer ---------- It gets the air out of it so the water can run freely. Before starting up a coil boiler what must be done first? ---------- Correct Answer ---------- Make sure that the water softener and chemical treatment is on Steam leaks will cause? ---------- Correct Answer ---------- Waste of fuel What would cause hard scale? ---------- Correct Answer ---------- Calcium & magnesium Steam leaks will cause? ---------- Correct Answer ---------- Waste of fuel

What test is performed on a boiler after a major repair? ---------- Correct Answer ---------- Hydrostatic test What is the purpose of continuous blowdown? ---------- Correct Answer ---------- To remove accumulated solids CO(carbon monoxide) will indicate what type of combustion? ---------- Correct Answer --- ------- Incomplete CO2(carbon dioxide) will indicate what type of combustion? ---------- Correct Answer ----- ----- Complete What is the purpose of the water column? ---------- Correct Answer ---------- Slow movement of water in column to reading How do you check water level if gauge glass breaks? ---------- Correct Answer ---------- Use try cocks Where do you find the registration numbers on a boiler certificate? ---------- Correct Answer ---------- Upper left hand corner How often are boiler licenses renewed? ---------- Correct Answer ---------- Annually or every 3 years What is the fee for a three year renewal? ---------- Correct Answer ---------- $80 What is the fee for a 1 year renewal? ---------- Correct Answer ---------- $40 License can be renewed how many days before expiration? ---------- Correct Answer ---- ------ 60 days In a fire tube boiler, the heat produced by gases of combustion? ---------- Correct Answer ---------- Passes through the tubes A mud drum , if used, is the lowest part if the water side of a__________boiler? ---------- Correct Answer ---------- Water- tube A horizontal return tubular (HRT) boiler is a __________boiler? ---------- Correct Answer ---------- Fire-tube the best way to determine when to do a boiler blow down is with? ---------- Correct Answer ----------- Water Analysis what can be used to vent a boiler instead of the steam drum vents? ---------- Correct Answer ----------- Top Try Cocks

Blow down the boiler column every what? ---------- Correct Answer ----------- every shift when should you blow down the boiler? ---------- Correct Answer ----------- once a day test safety valves every? ---------- Correct Answer ----------- 30 days an accumulation test does what? ---------- Correct Answer ----------- it accumulates steam to the point where safety lifts. safety valves are meant to do what? ---------- Correct Answer ----------- lift when the pressure is too high or pop. safety valves on a high pressure boiler should never exceed what? ---------- Correct Answer ----------- 6% MAWP a boiler operating at 14 psi is what type of boiler? ---------- Correct Answer ----------- low pressure boiler what type of boiler has the highest risk of blowing up? ---------- Correct Answer ----------- fire tubes because they have a high volume of water compared to the horsepower. cast iron boilers stacked on top of each other, like pancakes is called? ---------- Correct Answer ----------- HCB Horizontal Section when you remove combustable gas and replace it with fresh air in a boiler it is called what? ---------- Correct Answer ----------- Purge a boiler must be prepurged for how long? ---------- Correct Answer ----------- at least 30 seconds In a fire tube boiler the water is located where? ---------- Correct Answer ----------- outside the tubes In a water tube boiler the water is located where? ---------- Correct Answer ----------- Inside the tubes To have a safe and efficient boiler you need what pumps? ---------- Correct Answer ------ ----- one steam and one electric feed pump if you have 500 sqft of heating surface you must have what? ---------- Correct Answer --- -------- two safety valves and two feed pumps. if operating at 100 psi and above you must have? ---------- Correct Answer ----------- two blow downs

steam pressure gauge must be mounted at what point of the boiler? ---------- Correct Answer ----------- the highest part of the steam side. what's the best way to protect a steam gauge? ---------- Correct Answer ----------- install a siphon between the gauge and the boiler An Evaporation test, tests what on a boiler? ---------- Correct Answer ----------- it tests the low water fuel cutoff a siphon protects the steam gauge from what? ---------- Correct Answer ----------- The high temperature of the steam when is the only time you should open the boiler vents? ---------- Correct Answer ----------

• Filling, draining, startup, and shutdown Whats the last thing to check when filling a boiler? ---------- Correct Answer ----------- Make sure the vents are open. What pressure should you have in a pulverized coal furnace? ---------- Correct Answer -- --------- A negative pressure Pulverized coal is burned in? ---------- Correct Answer ----------- Suspension Best way to get rid of TDS (Total dissolved solids) is what? ---------- Correct Answer ----- ------ Continuous Blowdown What does the usable plug do for the boiler? ---------- Correct Answer ----------- It is the last low water alarm What is the difference between PSIA and PSIG ---------- Correct Answer ----------- 14.7 psi How much pressure is a low pressure boiler? ---------- Correct Answer ----------- Under 15 psi What is the ASME? ---------- Correct Answer ----------- American Society of Mechanical Engineering What is NOWL? ---------- Correct Answer ----------- Normal Operating Water Level What is NOP? ---------- Correct Answer ----------- Normal operating pressure what is the percentage of oxygen and nitrogen in a boiler? ---------- Correct Answer ------ ----- 21% oxygen and 79% nitrogen