Stationary Engineer Assessment Questions and Answers, Exams of Nursing

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How much clearance from the top of the boiler is needed for a HP boiler that produces 70000 lbs of steam? - Correct Answer 7 feet On a gas fired boiler what is the proper gas to air mixture - Correct Answer 30%-70% and in special arrangements it can be as high as 100%. ANSWER CHAPTER 11 remember% What is the total hardness in a system that was found to have calcium hardness of 60ppm and magnesium hardness of 18ppm and carbon hardness of 12 ppm? - Correct Answer TH=(Ca x 2.5) + (Mg x 4.1)\nTH=(60 x 2.5) + (18 x 4.1)\nTH= 150+73.8 =( 223.8 PPM) How often should a complete external inspection of the boiler be done? - Correct Answer Once a Shift With 24 hr operation how often do you check the water level? - Correct Answer Once per shift How often do you check the LWCO? - Correct Answer Once per shift How often do you check the High Limit Switch? - Correct Answer Annually A 2" pipe was found to be delivering water at 100 psia at 1040ft per second. How many gallons per hour will it deliver? - Correct Answer GPM= V (diameter squared) divided by .4085 ANSWER pg 469 BOG What controls the amount of blowback on a safety valve? - Correct Answer Blowback ring or adjusting ring On a open air expansion tank hot water boiler system; how high should it be mounted? - Correct Answer (4 Feet ) above the highest heating element.

What is the minimum top clearance of boilers with manholes? - Correct Answer 5 feet Package boilers; steam heating boilers and hot water heating boilers shall have a minimum clearance of? - Correct Answer 2 feet from ceiling. Code chapter 10 page Most important safety device on a boiler? - Correct Answer Safety relief valve What does a Black Liquor Boiler do? - Correct Answer Black Liquor is the by product of wood pulp processing in the paper making industry. What does Black liquor boiler known for? - Correct Answer Steam generation and recovery of soda ash Maximum line voltage for control on a boiler? - Correct Answer 150 volts Under what code are boilers designed and constructed? - Correct Answer ASME- CSD 1 How many low water cut offs are needed per code for a hot water system when a boiler has inputs greater than 400,000 btu per hr - Correct Answer 1 LWCO is needed. What is the minimum and maximum size for a safety valve per code for boilers? - Correct Answer Minimum 3/4" and Maximum 4 1/2" What stamp is put on a boiler after repairs? - Correct Answer "R" What is the equalizing system used for? - Correct Answer The equalizing system is for warming up the steam lead. A blowdown valve is located at the lowest water space of a boiler for three purposes - Correct Answer 1. to remove precipitated sludge or loose scale \n2. To permit rapid lowering of the boiler water if it has become too high accidentally \n3. As a means of removing water from the boiler so that fresh water may be added to keep the concentration of solids below the point where difficulties may be experienced.

In the old power boiler which type of feed-water regulators were not used? - Correct Answer Electronic After opening a boiler for repairs how much oxygen is needed? - Correct Answer 19% What is the first thing you do when shutting down a boiler? - Correct Answer Turn off (extinguish fire) What is the legal limit of acceptable asbestos particles? - Correct Answer 0.1 fibers per cubic centimeter What is CREEP? - Correct Answer Creep is defined as the slow deformation of material with time; with the deformation taking place at elevated temperatures with no increase in stress. What is the BTU content of Anthracite coal? - Correct Answer 14000 btu/lb What substance transfers electrical current in a photocell? - Correct Answer Electricity will flow when the CADMIUM is exposed to sufficient light. What device acts as a check valve in both directions and keeps pumps primed? - Correct Answer FOOT VALVES are used for pumps under suction pressure to prevent backflow primed? on the suction line. What protects boilers from explosion in the furnace? - Correct Answer A flame guard system is an arrangement of flame detection system; interlocks; and relays which will sense the presence of a proper flame in a furnace and cause fuel to be shut off to the furnace if a hazardous condition develops (improper flame or combustion). What size pipe is used as a header in a boiler operating at 100psi? - Correct Answer 6 inches What device is used to measure flue gasses - Correct Answer The Orsat Analyzer

Which low water cut off does not have a mercury switch? - Correct Answer The Submerged electrode type What is the btu output per lb of #4 fuel oil? - Correct Answer 18 What substance is used for the electric transmission in an RTD? - Correct Answer Platinum is used because of its stability at high temperatures How much air is needed for the combustion of pulverized coal; gas; oil? - Correct Answer 50% for coal and 10 - 30% for gas & oil In old power boilers which type of feedwater regulators were not used? \n(A) hydraulic \n(B) float \n(C) thermostatic expansion \n(D) electronic - Correct Answer ANSWER D electronic/electro-magnetic What is hard forming scale? - Correct Answer Silica With hydroxide present and normal oxygen levels which chemical will cause problems? - Correct Answer Chlorine The result from steel manufacturing and under pressure in boilers tends to cause buldging? A buldge is caused by? - Correct Answer A buldge is caused by overheating of the shell plates and it affects the entire thickness of the plate. A blister is caused by what? - Correct Answer Slag inclusion forming a lamination at the time the plate was rolled at the steel mill. A blister is a separation of the metal from the shell plate caused by impurities rolled into the shell plate when formed. With normal oxygen and low alkalinity. what is added to the boiler water? - Correct Answer Neutralizing Amines Which chemical is used to combat scale? - Correct Answer Combined phosphate treatment- sodium phosphate

Other than sulfite what chemical is used to combat corrosion in boilers? - Correct Answer Hydrazine What will neutralize acid? - Correct Answer Alkali and Lime Soda What mechanical device is used to remove scale from firetubes? - Correct Answer A tube rattler or vibrator What percentage of the pressure should a boiler have before you test the lever of a safety valve? - Correct Answer 75% Where is internal corrosion most likely to occur on a vertical tube boiler? - Correct Answer Water leg-Mud leg What are the minimum and maximum sizes permitted for blow down valves or connections? - Correct Answer 3/4"minimum 2 ½ " maximum A boiler operating at a pressure of 65lbs. What is the smallest size feed and blow off connections if the safety valve is set at 90 psi? - Correct Answer ½ " feed ¾ " blow off How often should water columns and water glass levels be checked on a high pressure boiler? - Correct Answer (Once A Shift)\nAt the beginning of each shift - beginning of the work effort What takes no actual action chemical part in combustion? - Correct Answer Nitrogen How many ppm of EDTA are needed to tie up 1ppm of hardness? - Correct Answer EDTA requires 10ppm of EDTA and 5 NTA to tie up each 1ppm hardness. On a package boiler; how many ways could cause fire puffs when it is started up? - Correct Answer 6 ways 1 - poor starting draft 2 - incorrect firebox 3 - wrong burner nozzle 4 - lean fire 5 - insufficient gas pilot or excessive gas pilot 6 - water in the oil What is the grade of light domestic fuel oil? - Correct Answer Grade 1 ( Number 1 )

How often should you test the operating control? - Correct Answer Annually How often should the testing and inspecting of the burner component? - Correct Answer Annually A lead sulfite photocell is what type of flame sensor? - Correct Answer Infrared light sensing What is the least amount of oxygen needed when a nitrogen blanket is used? - Correct Answer 19% How should a boiler be prepared for inspection? - Correct Answer Extinguish fire and allow boiler to cool slowly. Open the blow down and the drain; vent the boiler to the atmosphere Soot and ashes should be removed from all tubes; shell plates; heads; seams and every accessible external surface. The blow down should be shut if any other boiler feeds this line. Manhole - handhole plates and inspection plugs should be removed. All loose deposits of sludge or sediment should be washed out. The blow down should only be opened when it is certain that there is no pressure in the line and no one is inside the boiler. Any scale or oil deposits should be left for the water treatment specialist to see for analysis. A boiler properly prepared for inspection should be cool; dry and clean. It is advisable to attach a red tag marked "person in boiler" to the steam; blowdown; feed and fuel valves and also to the manhole plate whenever someone is inside a boiler. What function can a boiler operator contribute to boiler maintenance? - Correct Answer A) maintain a safe reliable plant B) maintenance and efficient plant C) Inspection and logging of items that need to be corrected during the next maintenance period What are manholes and handholes on a boiler for? - Correct Answer Examination or cleaning How do you protect a steam boiler? - Correct Answer Safety valve How to you protect a pressure vessel? - Correct Answer Pressure relief valve How do you protect a hot water boiler? - Correct Answer Pressure relief valve

What gages are on a steam boiler? - Correct Answer Water gage glass and pressure gage Methods used to control the temperature of a superheater? - Correct Answer Bypass damper - spray-type desuperheater - attemperator - condenser - tilting burner - flue gas recirculation What chemical would you use to prevent hard scale from forming in the boiler tubes? - Correct Answer Disodium phosphate and trisodium phosphate What chemical compounds in water cause permanent hardness? - Correct Answer Calcium sulfate and magnesium sulfate What factors must be taken into consideration when choosing a control for a boiler? - Correct Answer 6 factors 1. Steam pressure 2. Furnace pressure and draft 3. air pressure and flow 4. feed water pressure and flow 5. Flue gas flow & composition 6. proper ignition & burner - flame control How many safety controls shut down a boiler when an unsafe condition occurs? - Correct Answer 7 controls 1. Pressure limit or temperature 2. Low water fuel cutoffs 3. Flame failure safeguard systems 4. Automatic ignition controls 5. oil and gas fuel shutoffs/valve controls 6. air and fuel pressure interlock controls 7. feed water regulating controls In a steam generating system what is blamed on chemical treatment but is in fact part of a boiler design? - Correct Answer Poor circulation Class A Fires??? - Correct Answer Wood - sawdust - paper - rags Class B Fires?? - Correct Answer Flammable liquids - oils - tars and gasses Class C Fires?? - Correct Answer Electrical equipment What is the minimum clearance required when a boilers capacity is 5 000btus hr over 1000sq ft heating surface or an imput over 5 000 000 btus hr? - Correct Answer 7 feet

Under what code are oil fired boilers and their control systems covered? - Correct Answer O.F.B 726 A data plate has what information?? - Correct Answer manufacturer - model serial number

• stamp of approval When working in a boiler work permits should be aquired when? - Correct Answer For Each Shift ASME code requires that a LWCO control be tested by evaporation how often?? - Correct Answer Monthly ASME CSD1 requires the main gas burner to have what? - Correct Answer 2 manual shutoff valves. pg 81 1004.1 code book A HYDROSTATIC test is done at what pressure? - Correct Answer 1.5 times the MAWP or 50% over MAWP How many low water cutoff are needed per code on a hot water system? - Correct Answer One LWCO is needed when the boiler input is greater than 400 000 btus What gages are on a steam boiler? - Correct Answer pressure gage - water gage glass What gages are on a HW boiler? - Correct Answer pressure - Temp Name three types of low water cutoffs. - Correct Answer 1. float magnetic (rod to magnet to mercury switch) 2. Float linkage- link to mercury switch 3. Submerged electrode- water Boilers having more than 500square feet of heating surface should have how many means of feed water? - Correct Answer 2 Types of FEEDWATER REGULATORS - Correct Answer 1.Thermostatic mechanical regulator 2. Thermostatic fluid style 3. Float operated style

Name two types of commonly used feedwater pumps - Correct Answer Injector and Inspirator What piping arrangment is used to return condensate from steam lines and steam seperators? - Correct Answer HOLLYLOOP What would happen if high temp liquid passes through a centrifugal pump? - Correct Answer WIRE DRAWING A multi stage pump can be either __________ or_______? - Correct Answer Volute or Diffuser To prevent cavitation most pumps are stamped with the ____ _______ _______ ____? - Correct Answer NET POSITIVE SUCTION HEAD What are two types of condensate return systems?? - Correct Answer a.) Mechanical Return ; uses steam traps and pumps to aid return b.) Gravity Return System : uses gravity TO PREVENT THE SUPERHEATER FROM OVERHEATING ON START UP WHAT SHOULD YOU DO - Correct Answer EITHER FLOOD THE TUBES WITH WATER OR THE SUPERHEATER SHOULD BE VENTED TO THE ATMOSPHERE BY A FREE BLOW VALVE UNTIL THE BOILER GOES ON LINE. What device acts as a check valve in both directions and keeps the pump primmed? - Correct Answer FOOT VALVES ARE USED ON PUMPS UNDER SUCTION PRESSURE AND PREVENT FLOW ON SUCTION LINE WHAT PUMP HAS A WATER PISTON DIRECTLY CONNECTED TO A STEAM DRIVEN PISTON VIA A ROD? - Correct Answer RECIPRICATING What causes a piston type trap to open? - Correct Answer cold condensate (on test the steam psi drop and temp drop was used) Quickly opening a steam valve will cause _______ ________. - Correct Answer water hammer

What mechanical device removes scale from a watertube boiler? - Correct Answer a tube turbine What causes blistering? - Correct Answer A slag inclusion forming a lamination at the time the plate was rolled in the steel mill and it's actually a seperation of metal from the shell plate caused by impurities rolled into the shellplate when it was formed. To internally remove oxygen from the boiler use______ ________. - Correct Answer Sodium Sulfite A positioning control system is used on a ______ ________ - Correct Answer a process boiler A saybolt universal is a - Correct Answer measurement of viscosity Creep gets worse with _______________ __________ - Correct Answer elevated temps What type of valve WOULD NOT be a good choice if sediment were present - Correct Answer GLOBE How many btus does it take to take 10 lbs of steam from 40 to 41 degrees - Correct Answer 10 btus 1btu=1lb What is it called when you let a peice of equipment fail before you repair/replace it? - Correct Answer Breakdown maintenance What percent of blistering or buldging is ok? - Correct Answer 2% What kind of boiler are staybolts found on? - Correct Answer Fire tube boilers A 8 foot length of tube or shell can take up to ___% sag or bend and still be used without replacing? - Correct Answer 2%

What does a low water cutoff do in a low water condition? - Correct Answer Shuts off fuel supply What is the first indication of a low water condition - Correct Answer A red hot crown sheet If a boiler exceeds 100psi it must have how many blowdowns? - Correct Answer 2 What is the appropriate test for checking porosity of the metal? - Correct Answer PULSE ECHO ( A TYPE OF ULTRASONIC) What chemicals are used to combat corrosion? - Correct Answer Sodium Sulfite; hydrazine; catalied hydrazine If your boiler water has a PH of .5 what compound type do you add to neutralize it? - Correct Answer BASES - THEY REACT WITH ACIDS TO FORM A SALT What level of deionized water alkalinityis permitted for a 600 psi boiler? - Correct Answer 250 PPM What can oxygen cause in a system - Correct Answer PITTING CORROSION In a vertical boiler where is the first place to check for thinning tubes? - Correct Answer WATER LEGS especially at the bottom or on the combustion side at the upper ends of the tubes. What produces soft scale? - Correct Answer Calcium and magnesium carbonate and magnesium clorine Hideout in a boiler causes what to precipitate? - Correct Answer Sodium phosphate What is main cause of a generating tube failure? - Correct Answer overheating at the lower tubes due to scale sludge and poor circulation What refrigerant is flammable and non toxic? - Correct Answer Propane

What refrigerant class is Ammonia R 717? - Correct Answer B What is the purpose of a condensor in a refrigerant system? - Correct Answer to bring refrigerant to a liquid state Why is oil in a refrigerating system? - Correct Answer lubricates and cools compressor How is moisture removed from a refrigerant system? - Correct Answer filter dryer What type of gas DONT you use to leak test an AC system? - Correct Answer OXYGEN What is the maximum voltage on a boiler control circuit? - Correct Answer 150 VOLTS A fuel oil that has an API of 32 has how many btus per lb of heating? - Correct Answer 19490 Which fuel oils need heating? - Correct Answer #4;#5;# What size pipe is used as a header in a boiler operating at 100 psi? - Correct Answer 6 inches What function can an operator contribute towards boiler function? - Correct Answer saftey

• efficiency - log plant readings How is heat transferred in a boiler? - Correct Answer CONVECTION - CONDUCTION - RADIATION What is not an organic sludge conditioner? - Correct Answer Amines Which by-product has the largest heating value? - Correct Answer Butane An increase in 10 - 20 degrees can reduce creep life by how manuy years - Correct Answer 10 - 20

which coal burns with a yellow flame? - Correct Answer Bituminous What nondestructive testing is best for testing thickness of plates and tubes? - Correct Answer Ultrasound On a 2"valve auxillary staem what valves are needed? - Correct Answer Single supply OS&Y What are the min and max size of a safely valve per code for boilers? - Correct Answer Min 3/4 and max 4 1/ What stamp is put on a safety valve after its been repairs? - Correct Answer VR stamp How often do you test your float controls on a hot water boiler? - Correct Answer Weekly How often do you test a safety valve with pressure? - Correct Answer Annually How often do you test a safety valve with a lever test? - Correct Answer Monthly This part of the safety valve works in conjunction with the adjusting ring to allow it to pop open. - Correct Answer Huddling Chamber What do you do if a safety valve is leaking? - Correct Answer Reground seat A safety valve discharge pipe should go how high when workers maybe present? - Correct Answer 6 feet high If 2 safety valves are used with the same discharge pipe the discharge line must have - Correct Answer The same area as both valves area Every discharge valve should have what size drain? - Correct Answer 3/8 to 1/2 drain

What are the Blowback setting on a safety valve? - Correct Answer Up to 4% but not less than 2 lbs Safety valve plate has; - Correct Answer Manufacturer's name or trade mark- type or design# - Size - seat dial - set pressure - blowdown - Discharge capacity lb per hr - capacity lift - AMSE symbol or NB stamping. What percentage of boiler pressure is needed to hand check a boiler safety valve? - Correct Answer 75% On an open air expansion tank hot boiler system; How high should it be mounted? - Correct Answer 4 feet above the highest heating element. What is the minimum clearance of boilers without manhole covers on top? - Correct Answer 2 ft Under what code are oil fired boilers & their control systems covered? - Correct Answer Listed & labeled in accordance with UL 726.NFPA 8501 How high is a pull station mounted on a wall? - Correct Answer 48 inches When working in a boiler; work permits should be acquired? - Correct Answer For the work shift. To inspect a boiler they must be what? - Correct Answer Be employed either by the state or by an insurance company licensed to write boiler and pressure vessel insurance in that jurisdiction ASME CSD 1 requires the main gas burners train to have what? - Correct Answer 2 manual safety shutoff valves Welds must be approved and witnessed who? - Correct Answer Authorized inspector. Hydrostatic test is done at what pressure? - Correct Answer 1.5 times the MAWP or 50% over MAWP

During a hydro test if the boiler leaks who do you notify? - Correct Answer Authorized boiler inspector and they will advise you what to do. How many low water cut offs are needed per code for hot water boiler systems? - Correct Answer When the boiler has an input greater than 400 000 BTU's per hr 1 L.W. cutout is needed What are the minimum and maximum sizes permitted for blowdown valves or connection?

• Correct Answer 1 min & 2 - 1/2 max If a boiler has 1" blow down pipe; what diameter should the boiler blow down tank air vent should be? - Correct Answer 2.5" What are 3 low water cutouts? - Correct Answer (Float magnet type - it has a plunger on a float rod an a permanent magnet with a mercury switch) (Float-linkage type- a linkage connected to a mercury switch) (Submerged-electrode type- uses an electrode make the complete burner circuit) What does a low water cut out do in a low water condition? - Correct Answer Shuts off the fuel supply when it drops below the visible level Boiler that exceeds 100 psi must have how many blow downs - Correct Answer TWO How many times the safety valve setting should the pressure gauge be? - Correct Answer 1 - 1/2 to 2 times When blowing down the water column you notice the gauge glass slowly returns to the normal level; this could be indication of what? - Correct Answer The bottom of the gauge glass is clogged and giving a false reading How many inches should the lowest visible level in the gauge glass be in a boiler? - Correct Answer TWO inches What are the minimum gauge glass connection and drain? - Correct Answer 1/ connection and 1/4 drain

What must be done if the gauge glass cannot be seen from the operating area? - Correct Answer There must be 2 independent remote level indicators installed. Blowdown shall not be less than __ or lower than __ of the safety valve? - Correct Answer Less than 2 lbs or lower than 96% of the safety valve Blow down valves fitting should be designed at least __ % greater pressure than the MAWP? - Correct Answer 25% What are two types of commonly used feed water pumps - Correct Answer Injectors and Inspirator How does steam flow through pipes? - Correct Answer Larger diameter slower the flow Smaller diameter higher velocity - Pressure difference draws flow An acid is a compound that yeilds ________ ions and has a pH value lower than 7. - Correct Answer hydrogen A base is a compound that yields __________ ions and has a pH value greater than 7. - Correct Answer hydroxyl A _________ is a gelatin like sustance that has very small particles in suspension. These particles are usually less than ___ microns in size. - Correct Answer colloidal 0. One grain is equal to ______ parts per million. ________ grains equals one pound. - Correct Answer 17.1 ; 7000 A solid that is separated from a solution is a_________________. - Correct Answer precipate All impurities are in one of four states - Correct Answer they are ________; __________; _________; and _________.

The capacity of a substance to combine with another substance is its _____________. - Correct Answer Valence Calcium and Magnesium bicarbonate produce ___________ hardness. - Correct Answer temporary Scale that is soft and muddy simular to magnesium carbonate is___________________. - Correct Answer calcium carbonate In order to prevent corrosion - Correct Answer boiler water pH is maintained between ________________. __________ _________ is used to internally remove oxygen from the boiler. - Correct Answer sodium sulfite In order to remove one pound of oxygen - Correct Answer it takes ________ lbs of sodium sulfate. __________ are added to the boiler to prevent steam line and condensate line corrosion. These chemicals are used because they will blow off with the steam. - Correct Answer amines When boiler water has high levels of solids; steam bubbles can be trapped below the water line causing water level fluctuations known as __________. - Correct Answer Foaming ___________ is when water impurities leave the boiler with the steam. - Correct Answer carryover The loss of metal that forms smooth - Correct Answer rolling contour as a result of an acid attack is called __________. __________ blowdown lowers the TDS level in the boiler. - Correct Answer surface The electrolytic flow between dissimilar metals in a waterborne environment which results in localized corrosion is known as _____________. - Correct Answer galvanic action

The_______ _______ or______ _______ _______ sense heat to prove flame in a boiler. - Correct Answer Stack switch - rectifying flame rod Rectifying phototubes and cadmium sulfide phototube both prove flame in the boiler by sensing __________ ________. - Correct Answer Visible light The chief heat producing elements in fuels are_____; ______ and__________. - Correct Answer carbon hydrogen sulfer The presence of _________ in flue gas is an indication of incomplete combustion. - Correct Answer Carbon monoxide The EPA limits the amount of particulate emission to ________ pounds per 1 000 000 btu's input. - Correct Answer. When NOx combines with organic gases ________ is produced. - Correct Answer Ozone Anthracite coal is very hard and has a high percentage of fixed________ and a heating value of ________btu's per pound. - Correct Answer fixed carbon - 14000 __________ is the lowest grade of coal; has a claylike appearance and a heating value range of _______ to _______btu's per lb. - Correct Answer Lignate 7000 to 11000 btu's per lb Spreader and chain grate stokers are types of ___________ stokers - Correct Answer over feed #2 fuel oil is classified as _________ domestic fuel oil. - Correct Answer medium #6 fuel oil is also known as?? - Correct Answer Bunker C #4 fuel oil has about________ btu's per lb. - Correct Answer 18 Which fuels require heaing prior to being sprayed into a furnace? - Correct Answer 4;5;

As the temperature of a fuel oil rises; the visosity goes_____. - Correct Answer Down What burner can burn almost any fuel at any temperature?? - Correct Answer steam atomizing Steam atomization typically consumes about ____ percent of the steam produced by the boiler. - Correct Answer 2% An air atomizing burner requires______psi air pressure above the oil pressure when burning heavy oil. - Correct Answer 20 Flame impingment on the metel surfaces of the boiler can cause the metal to ______ and ______. - Correct Answer overheat; bulge Obstructions in the combustion airflow path can lead to a rich fuel air mixture; which can lead to _______ coming from the stack. - Correct Answer smoke For proper combustion air into the boiler room - Correct Answer one square inch of outdoor air opening is required per _______btu/hr input. Natural gas has a heating value of ______btu's per ft3 or _________________ btu's per therm. - Correct Answer 1000 btu per ft cubed or 100 000btu's per therm Coal gas is produced from the volitile matter from______ coal and has a heating value of_____bu's per cubic foot. - Correct Answer Bituminous; 550btu's per cubic foot Propane has a heating value of________btu's per cubic foot. - Correct Answer 2500 Butane has a heating value of________btus per cubic foot. - Correct Answer 3200 - 3260 The type of fuel gas with the lowest btu content is _____ ______ gas and it has ______ btus per cubic foot. - Correct Answer Blast Furnace; 90 btu per cubic foot

Sewage gas contains about 2/3 methane and 1/3 carbon dioxide. The heating value is about _____ btu per cubic foot. - Correct Answer 650 The momentum of the low pressure gas is used to draw the air required to complete the combustion process in an _________ burner. - Correct Answer Atmospheric burner Atmospheric burners have _________ to ________ percent pre-mixing of natural gas and air. - Correct Answer 30 % to 7 0% Infared flame scanners use a ____________ __________ cell to detect the presence of a flame. - Correct Answer Lead Sulfide Unlike an infared scanner; the ultraviolet scanner is not affected by light given off by hot________________. - Correct Answer Refractories What is the circumference of a circle with a 6" diameter? - Correct Answer c=dx3. How do you find the area of a circle? - Correct Answer A=Dsqared X. Diameter of circle - Correct Answer D=2 X Radius Name four types of corrosion - Correct Answer 1. fretting 2. galvanic 3. crevice 4. localized degree F to degree C - Correct Answer C=(F-32)/1. C to F formula - Correct Answer F=(C X 1.8)+ GPM formula - Correct Answer GPM=VxDsquared/. Capacity formula - Correct Answer GPM=LANE/2 31 A steam pressure guage has a _____ to protect against the high _________ of the steam. - Correct Answer siphon - temperature

A cross or tee connection to the boiler drum used eclusivly for attaching a test pressure guage is known as - Correct Answer inspectors connection A ________thermometer uses two dissimilar metals that bend predictably with a change in temp. - Correct Answer BIMETALIC Minimum size for the connection between the guage glass and the water column is _______ - Correct Answer 1/2" 2 or more saftey valves are required on a boiler with a heating surface inexcess of ______square feet or electric imput of ________KW - Correct Answer 500 sq ft ; 500KW Safetey valves on a superheater should be set _____than the safety valve on the steam drum - Correct Answer lower Boiler stop valves over 2 inches in diameter should be ___ _______ ___ ______. - Correct Answer OS&Y When boiler pressure exceeds _____psi; two blowdown valves must be used; one must be a slow opening valve - Correct Answer 100 Slow opening blowdown valves must complete ___turns between full open and full shut. - Correct Answer 5 A COPES feedwater regulator is an example of a ________ ____________type feedwater regulator. - Correct Answer thermostatic mechanical The feedwater control valve position is controlled by the _______ of the fluid as caused by the temp changes caused by water level changes in the thermostatic tube - Correct Answer PRESSURE The 3 element feedwater regulator senses ________ _________ AND_________. - Correct Answer steam flow - feedwater flow - and water level

The _______ ________uses boiler water to complete the electrical circuit - Correct Answer submerged electrode The submerged electrode does not have a __________ _______. - Correct Answer mercury switch 2 types of electric boilers - Correct Answer RESISTANCE and ELECTRODE Electric current flows through the water and converts electrical energy to heat energy in the ________type boiler - Correct Answer ELECTRODE A high voltage steam electrode has voltage between _____ AND_________ - Correct Answer 2300 and 15000 Volts A high voltage steam electrode boiler has ___ generating compartments; one for each phase. - Correct Answer 3 The capacity of a safety valve on an electric boiler is __ lbs per KW or ___ btus per hr per KW - Correct Answer 3.5 LBS - 3500btus per KW An HTHW system has better temp control becauase it has a large _______ _______ ________. - Correct Answer heat storage capacity Downtherm thermal liquid systems use ________ _____________ at tubes to prevent leaking - Correct Answer welded joints __________ ________ boilers recover heat in the exaust from a gas turbine to produce usefull steam - Correct Answer WASTE HEAT When exaust gasses dont have enough energy to produce the final steam pressure _______ ________ is used. - Correct Answer SUPPLEMENTAL FIRING A recovery steam generator converts steam energy to mechanical energy to produce electricity in a ________ ________ plant. - Correct Answer COMBINED CYCLE

___________ ___________Sell steam to local industrial plants and surplus electric to local utilities - Correct Answer COGENERATION PLANTS Superheated steam is injected into a gas turbine to increase electrical output in the ______ _____________. - Correct Answer CHENG CYCLE Waste products from sugar cane are used in a BAGASSE plant. When dried it has a heating value of ________ to _________ btus per lb - Correct Answer 8000 to 8700 btus per lb Black Liquor boilers are known for - Correct Answer STEAM GENERATION and production of SODA ASH For black liquor boilers to sustain combustion - Correct Answer they must contain _______% solids. Three types of ATMOSPHRIC BED BOILERS - Correct Answer 1.) BUBBLING 2.) DEEP 3.) CIRCULATING FLUIDIZED BED Minimum and Maximum size of a blowdown are - Correct Answer 3/4"min - 2 1/2"max Ratio of heat output to heat imput - Correct Answer BOILER EFFICIENCY Pressure relief valve on a hot water boiler must be at least ___" diameter and no more than _____" in diameter - Correct Answer 3/4" - 4 1/2" Two types of headers in early watertube boilers - Correct Answer SINUOUS or BOX Volume of a cylinder - Correct Answer V = (D X D X .7854) X H Boiler Horse Power formula. - Correct Answer Lbs per hr X factor of evaporation divided by 34.5 Water Column Formula - Correct Answer Water coumn = P/.433

WATER AT ITS BOILING POINT IS CONSIDERED __________ LIQUID - Correct Answer SATURATED SATURATED STEAM CONTAINS NO _______AND IS NOT _______. - Correct Answer LIQUID - SUPERHEATED THE TEMP OF A LIQUID MINUS 32 - Correct Answer ENTHALPY CRITERIA FOR A MINIATURE BOILER - Correct Answer a) 16" DIAMETER b) 5 FT CUBED GROSS VOLUME c) 100psig OR LESS d) 20 SQUARE FEET OF HEATING SURFACE UNLIKE A WATER HEATING BOILER A HOT WATER SUPPLY BOILER DOES NOT GET ______ ________. - Correct Answer RETURN WATER SUPERCRITICAL BOILER OPERATES AT 3206 psia OR 705 DEGREES IN A SUPERCRITICAL BOILER WATER AND STEAM HAVE THE SAME __________. - Correct Answer Density The _______ __________ turns the burner off when the steam pressure in the boiler is sufficiently low. - Correct Answer operating control The maximum voltage on a control circuit is - Correct Answer 150 Volts Flues are specified by their _________ diameter.......Tubes are specified by their _________diameter - Correct Answer inside; outside Sum of latent and sensible heat gives you what - Correct Answer Total Heat Stress imposed on a boiler by a sudden drastic change in temp. - Correct Answer Thermal Shock Guage pressure + atmospheric pressure - Correct Answer Absolute pressure

Tubes exposed to the highest temps in the furnace and contain rising water are? - Correct Answer riser tubes _____________tubes contain cooler desending water replenish water to riser tubes - Correct Answer Downcomber Manholes are __________in shape - Correct Answer ELIPTICAL Handholes are generally __" by ___" - Correct Answer 4"x5" 2 methods of supporting an HRT - Correct Answer 1.) lug and roller 2.) overhead suspension Advantages of Watertube boilers - Correct Answer 1. higher capacity 2. drum not exposed to the radient heat of the fire. ??????____ cubic inches in 1 gallon - Correct Answer 231 A _______ _______ is constructed of flat plates reffered to as a tubesheet and a tubecap sheet. - Correct Answer BOX HEADER Bent tubes are more________ than straight tubes. Bent tubes allow for free expansion and contraction. - Correct Answer flexible ____________prevents the tube ends from being overheated - Correct Answer Beading When a furnace baffle breaks the gasses short circuit causing excessive ______________. - Correct Answer fluegas temps Welding flat strips of metal between the waterwall tubes is known as _________ ____________ construction. - Correct Answer membrane wall The amount of pressure below the setpoint that must be relieved before a safety valve closes - Correct Answer BLOWBACK