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

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Bailers Exam New 2024 Latest Version Best Studying Material with All Questions from Actual Exam and Correct Answer 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 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 100,000 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 ---------- - 34.5 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 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 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" 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 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 what is the purpose of a blow down valve? ---------- Correct Answer ----------- to remove sediment and sludge from the mud drum of the boiler What is MAWP? ---------- Correct Answer ----------- Max allowable working pressure. Should not exceed 6% if there is a problem in the boiler room who do you call? ---------- Correct Answer ---------- - Chief Engineer if there is a gas leak or a gas smell in the boiler room who do you call? ---------- Correct Answer ----------- The Gas Company What does it mean to drop the fusible plug? ---------- Correct Answer ----------- It means you melted the fusible plug Name three types of stress? ---------- Correct Answer ----------- compression, Tensile, shear Name three ways to transfer heat? ---------- Correct Answer ----------- Convection, Conduction, and Radiant what type of fittings are used on high and low pressure boilers? ---------- Correct Answer ----------- Low pressure: Screwed High pressure: flanged and welded what is the purpose of pouring water down a floor drain? ---------- Correct Answer --------- -- prevent gas or odor from building up how often should you blow down the boiler? ---------- Correct Answer ----------- Every 24hrs or once a day What are three types of Refrigerants used on boilers? ---------- Correct Answer ----------- Ammonia, Lithium Bromide, Lithium Chloride What is sensible heat? ---------- Correct Answer ----------- Change in Temperature What is latent heat? ---------- Correct Answer ----------- A change in state of phase What is a BTU? ---------- Correct Answer ----------- The amount heat it takes to raise 1 pound of water 1 degree F What does MATT mean? ---------- Correct Answer ----------- Mixture, Atomization, Time, Temp A high pressure boiler is greater than what psig and what bhp? ---------- Correct Answer ----------- 15 psi and 6 bhp what will happen if there is a sudden dropping pressure and not a drop in the temperature? ---------- Correct Answer ----------- A boiler explosion When you double the temperature of a gas what happens to the volume? ---------- Correct Answer ----------- It doubles How often do you blowdown the gauge glass and water column? ---------- Correct Answer ----------- at least once a shift and its at the beginning of the shift what is located on the water column keep sludge from building inside? ---------- Correct Answer ----------- A blow down valve In a water tube boiler water is inside the tube, where is the gasses of combustion? ------- --- Correct Answer ----------- Around the tubes A microprocessor burner control system will secure the flame on all problems EXCEPT - --------- Correct Answer ----------- Changing fuel ratio depending on steam load change If I have oxygen fuel and release in heat, what other factor is missing? ---------- Correct Answer ----------- Temperature Positioning control system need what to operate? ---------- Correct Answer ----------- Clean, dry air If you had a screw type and a quick open valve uses for a blowdown, what order are they opened? ---------- Correct Answer ----------- Quick open valve is opened first and closed last What Type of furnace is a pulverized coal Furnace? ---------- Correct Answer ----------- Negative Pressure Why is a positive pressure Furnace Dangerous? ---------- Correct Answer ----------- If there are any leaks it will leak toxic gasses into the boiler room. when looking for pressure in a vacuum, if you have psig how do you determine psia? --- ------- Correct Answer ----------- Take atmospheric pressure and subtract psig Thermal efficiency is the ratio of the heat available Vs? ---------- Correct Answer ----------- The ratio of the Heat Absorbed a safety valve is set on a boiler so that the pressure doesn't exceed what MAWP? ------- --- Correct Answer ----------- 5 Psi During water analysis you search for what? ---------- Correct Answer ----------- TDS The steam and water drum of water tube boilers is dished (concave) to eliminate the need for what? ---------- Correct Answer ----------- Stays In a Fire tube Boiler the heat and gasses of combustion pass where? ---------- Correct Answer ----------- Only around the combustion chamber Vertical fire tube boilers require what? ---------- Correct Answer ----------- High Ceilings, less floor space, and the use of stay bolts In a water tube boiler the heat and the combustion gas pass through where? ---------- Correct Answer ----------- Pass around the tubes The mud drum is the lowest part of the water side of what boiler? ---------- Correct Answer ----------- Water tube boiler what boiler has a large volume of water in relation to horsepower size? ---------- Correct Answer ----------- Firetube boiler Boiler plates and stay bolts are subjected to what type of stress? ---------- Correct Answer ----------- Tensile Safety valve connections must be approved by who? ---------- Correct Answer ----------- ASME What is the most important fitting on a boiler? ---------- Correct Answer ----------- The safety valve To prevent failure from going over the MAWP every boiler must have what? ---------- Correct Answer ----------- a safety valve What are safety valves designed to do? ---------- Correct Answer ----------- Pop open Super heater safety valves are set to open ____? ---------- Correct Answer ----------- before the main safety valves are opened When testing the safety valve by hand there must be _____? ---------- Correct Answer --- -------- at least 75% of the popping pressure any repairs done to the safety valve should be done by the ____? ---------- Correct Answer ----------- Safety valve manufacturer if it is necessary to test the relieving capacity of a safety valve ____? ---------- Correct Answer ----------- an accumulation test is put on the boiler The relieving capacity of a safety valve is measured in ______? ---------- Correct Answer ----------- pounds of steam per hour capable of discharging under a given pressure Try Cocks are ___? ---------- Correct Answer ----------- a secondary means of determining water level in a boiler a steam pressure gauge is calibrated in ____? ---------- Correct Answer ----------- pounds per square inch The pressure at the base of a vertical foot of water is _____ psi? ---------- Correct Answer ----------- 0.433 The boiler vent is open when warming up a boiler until ____? ---------- Correct Answer -- --------- there is 10 to 15 psi of steam pressure on the boiler Saturated steam is steam at ____? ---------- Correct Answer ----------- its corresponding temp and pressure When steam is superheated the ____? ---------- Correct Answer ----------- the temp increases with no increase in the pressure soot should be ___? ---------- Correct Answer ----------- removed from the boiler tubes for better heat transfer Main boiler stop valves must be ___ valves. ---------- Correct Answer ----------- os&y gate the ASME code will allow an automatic non return valve to be used as a main steam stop valve. If one is used it must be___. ---------- Correct Answer ----------- installed as close to the shell of the boiler as practical on the main steam line. When the boiler is equipped with hand-operated, main steam stop valves, to cut the boiler in on the line, the steam pressure on the incoming boiler should be ___. ---------- Correct Answer ----------- slightly lower than line pressure When the boiler is being inspected, the two main steam stop valves are____? ---------- Correct Answer ----------- closed, locked, and tagged During a boiler warm up, to remove any condensate trapped between the two boiler stop valves the ____. ---------- Correct Answer ----------- free blowing drain should be open According to the ASME code, boilers operating at 100 psi or over must have ---------- Correct Answer ----------- two bottom blowdown valves When blowing down a boiler with a quick opening and a screw type valve, the quick opening valve is ________ ---------- Correct Answer ----------- opened first and closed last If a quick-opening valve is used as a bottom blowdown valve, it must be located ---------- Correct Answer ----------- between the boiler and the slow opening (screw-type) valve The maximum size of the bottom blowdown line and the surface blowdown line is ___ -- -------- Correct Answer ----------- 2.5 inches Bottom blowdown lines on a water tube boiler are located on the___ ---------- Correct Answer ----------- mud drum oxygen and other non condensable gases are separated from the feed water ____. ------ ---- Correct Answer ----------- in the open deaerator feed water heater the four systems to operate a steam boiler are _____. ---------- Correct Answer ----------- steam, feed water, fuel, and draft in order to produce 1 lbs of steam it is necessary to ____. ---------- Correct Answer ------- ---- 1 lb of water Steam that has lost its heat and has turned back into water is ___. ---------- Correct Answer ----------- condensate A safe and efficient boiler plant should include _______________ pump(s) ---------- Correct Answer ----------- one steam and one electrical feed water on a boiler burning low pressure gas, the volume (amount) of gas burned is controlled by the _____. ---------- Correct Answer ----------- volume of air passing through the Venturi tube on the fuel oil system, the purpose of the duplex strainers on the suction line between the tank and the fuel oil pump is to _____. ---------- Correct Answer ----------- allow one strainer to be cleaned without securing the boiler A draft fan located between the boiler and chimney is used in _____ draft system -------- -- Correct Answer ----------- induced the open feed water heater is located where? ---------- Correct Answer ----------- above the feed water pumps No. _____ fuel oil needs to be heated before it is pumped so that it can flow. ---------- Correct Answer ----------- 6 pulverized coal ha the consistency of talcum powder so that it___. ---------- Correct Answer ----------- can come in closer contact with the oxygen for complete combustion Draft is defined as a difference in pressure that causes ___. ---------- Correct Answer ---- ------- air or gases to flow what does the condensate system do? ---------- Correct Answer ----------- removes the carbonic acid from condensate what does the deairator get rid of? ---------- Correct Answer ----------- Co2 where are steam traps installed? ---------- Correct Answer ----------- End of the steam header What do steam traps do? ---------- Correct Answer ----------- contribute to the efficiency of the steam plant by removing air and condensate from the steam lines and the heat exchangers what is a type of steam trap? ---------- Correct Answer ----------- Thermostatic trap - Radiator Boiler Efficiency means what? ---------- Correct Answer ----------- Ratio of heat absorbed by the water VS the heat available in the fuel What elements are needed for combustion? ---------- Correct Answer ----------- -Fuel -Oxygen -Heat -Time to burn -Turbulence -MATT What type of boiler is a scotch marine boiler? ---------- Correct Answer ----------- Fire Tube what type of boiler is an HRT boiler? ---------- Correct Answer ----------- Fire tube where is the water and fire on a externally fired F.T boiler? ---------- Correct Answer ------ ----- water is inside and the fire is on the bottom. what is a internally fired fire tube boiler? ---------- Correct Answer ----------- Horizontal Return Tube Boiler what are the requirements for a vertical fire tube boiler? ---------- Correct Answer ---------- - -high ceilings -Does not need a lot of floor space -combustion chamber needs to be supported by the stables what is not true about a vertical fire tube boiler? ---------- Correct Answer ----------- it can only burn one type of fuel what is compressive stress? ---------- Correct Answer ----------- equal and opposite forces acting towards the center What is tensile stress? ---------- Correct Answer ----------- Equal and opposite forces acting away from the center What is Shear stress? ---------- Correct Answer ----------- equal opposite forces acting parallel to each other what got rid of the need for stay bolts in the box header? ---------- Correct Answer -------- --- Sineous header what is a water wall? ---------- Correct Answer ----------- it is lined in the boiler bib the furnace and they increase heat transfer, surface, and protect refractory. What is a Aquastat? ---------- Correct Answer ----------- Hot water boiler what is a class A fire? ---------- Correct Answer ----------- fire caused by Ash What is a class B fire? ---------- Correct Answer ----------- flammable liquids such as gas, oil, and grease what is a class c fire? ---------- Correct Answer ----------- Electrical fire what are the three types of coal? ---------- Correct Answer ----------- lignite, bituminous, anthracite lignite coal ---------- Correct Answer ----------- Low heating Value bituminous coal ---------- Correct Answer ----------- Soft coal with a high volatility content. if sits too long could have spontaneous combustion. Antracite coal- ---------- Correct Answer ----------- Hard coal with high fixed carbon content when talking about coal how do you say hardness and size? ---------- Correct Answer --- -------- Rank and grade what is an immersion a boiler? ---------- Correct Answer ----------- a boiler that creates heat by resistance offered to passage of electric current through the element. what do you do when turbining the tubes? ---------- Correct Answer ----------- make sure to keep moving how much can a safety valve allow the boiler MAWP/ ---------- Correct Answer ----------- 5psi what is chattering? ---------- Correct Answer ----------- Rapid open and closing of the safety what is Lancing the boiler? ---------- Correct Answer ----------- blowing high pressure air through the tubes to blow all the sut out what should you do when lancing the boiler? ---------- Correct Answer ----------- wait till boiler is cooled down or could cause dust explosion what is a reset at lower pressure called? ---------- Correct Answer ----------- Blowdown or blowback when replacing gauge glass what should you know? ---------- Correct Answer ----------- replace gauge glass 1/4 in shorter than the inside dimension what size should water column connections be? ---------- Correct Answer ----------- at least 1in if you have a safety device that you are suspect about what should you do? ---------- Correct Answer ----------- just have it replaced what is the correct sequence to fire up a boiler? ---------- Correct Answer ----------- 1)Purge for 30 seconds 2)light the pilot 3)prove the pilot 4)light the main flame 5)prove main flame 6)Release automatic control what type of boiler has a MAWP of 14psi? ---------- Correct Answer ----------- Low pressure boiler automatic combustion control system ---------- Correct Answer ----------- regulating high fire and low fire. which of the following could be dangerous to safe operation of a low pressure boiler? --- ------- Correct Answer ----------- adding water to an operating boiler when the water level can not be seen in the gauge glass tube. which of the following is best if a low pressure boiler does not have an air vent? ---------- Correct Answer ----------- vent the boiler with the top try cocks what is the purpose of an evaporation test on a low pressure boiler? ---------- Correct Answer ----------- to test the low water cutoff control