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_________ are necessary for complete combustion - answer time, temperature, mixture, and atomization if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______ - answer 214. a boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The blowdown is______psi - answer 12 an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo-generator - answer steam turbine a boiler is producing 40,000lb of steam/hr at a pressure of 100 PSI and a steam temperature of 500 degrees Fahrenheit. The steam produced is _______ steam - answer superheated the economizer on a boiler is used to _______ - answer add heat to the feed water blowers are normally used with________ boilers - answer water tube overheating of tubes on a boiler can be caused by________ - answer scale on tubes
carbon dioxide in a condensate return system causes_________ - answer channeling a ________ pump is a positive displacement pump - answer reciprocating a boiler generating 6000 lb of steam/hr produces _______btu/hr - answer 6,000, a bottom blowdown is performed on a boiler to _____ - answer discharge sludge and sediment water columns are connected to the boiler with a minimum of _______" pipe - answer 1 the minimum size of a water column blowdown valve is_______". - answer 3/ the maximum size bottom blowdown valve on a boiler is_________". - answer 2 1/ a ________ allows condensate to pass through, but stops Steam. - answer a steam trap when taking over a shift, the first thing to do is check the________ - answer water level in each boiler according to the asme code, a high-pressure boiler having more than 500 square feet of heating surface shall have________ - answer two or more safety valves
______ draft is produced by a fan located between the boiler and the chimney - answer induced the overspeed trip on a steam turbine should be tested ______ - answer before putting the steam turbine on-line a high CO2 reading in the gases of combustion is a sign of____ - answer High combustion efficiency the purpose of chemically treating feedwater is to________ - answer turn scale-forming salts to a non adhering sludge water in a d rating feed water heater is prevented from entering the steam line by a(n) _______. - answer Loop seal or internal overflow a steam turbine operating at 3600 RPM will trip at_________ rpm - answer 3960 he steam line going to The Blowers is connected to the main ________
- answer steam drum before using blowers on a boiler,________ - answer drain set blower lines an accumulation of snow on the Fireside of a boiler tubes________ - answer decreases boiler efficiency a globe valve installed in the feed water line between the feed water pump and boiler has a pressure from the feed water pump_________ the valve disc - answer under
the range of a pressure gauge should be twice the safety valve setting, but not less than______ time (s) the safety valve setting - answer 1 1/ hard scale formed on the inside of tubes is best removed by________ - answer air- or water-driven turbines to correct a low water condition,_____ - answer secure fires desuperheater drain is used to_______ - answer establish steam flow a sudden rise in chimney temperature with no increase in load indicates______ - answer there is a broken baffle the btu content of natural gas is_____ - answer 100,000 btu/therm the safety valve setting on the Steam and water drum is ________ a superheater safety valve - answer higher than the btu content of number 6 fuel oil is approximately - answer 18750 BTU / lb chemicals can be added to a boiler by a______pump - answer proportioning the feed water stop valve is found between the____ - answer boiler and check valve sensible heat is______ - answer heat that can be measured with a thermometer
a ringelmann test is used to determine_______ - answer smoke density a flame scanner proves (verifies) __________ - answer pilot in Maine Flame according to the asme code, when warming up a boiler the air cock is closed when_______ - answer the steam pressure gauge reads 25 psi a motor rated at 25 horsepower delivering 20 horsepower is operating at_______% capacity - answer 80 a deposit of scale or mud in an HRT boiler could cause_____ - answer a bag to develop water wall tubes protect the refractory and_____ - answer increase boiler heating surface steam at E250 psia and 400 degrees Fahrenheit is considered______ Steam - answer saturated sensible heat is heat that_____ - answer changes a substances temperature but not its state extra-heavy pipe must be used on blowdown lines when the steam pressure exceeds______ psi - answer 125 to check the water level on a boiler online, it is best to_____ - answer blowdown the gauge glass
a steam pressure gauge has a siphon between the boiler and the pressure gauge to _______ - answer prevent Steam from entering the pressure gauge if a boiler evaporates 50,000 lbs of steam/hour and is evaporating 10 pounds of steam/sq ft of heating surface, the heating surface of the boiler is ____sq ft - answer 5000 oxygen in feed water causes ______ - answer pitting it is permissible to have one blowdown valve on a boiler operated under______ psi - answer 100 at atmospheric pressure, water boils and turns to steam at _____ °f - answer 212 a steam pressure gauge is protected against excessive temperature by a ______ - answer siphon the only type of safety valve allowed on a boiler by the asme code is a_____ safety valve - answer spring-loaded pop the primary function of a boiler is to _____ - answer generate steam efficiently if the burner is firing and no water is in the gauge glass, the best procedure to follow is to_______ - answer shut down the burner and secure the boiler a high pressure boiler operates at a pressure above______ PSI and 6 BHP - answer 15
after replacing a gauge glass but before placing it in service, it is necessary to ______ - answer crack open the steam valve in warm the gauge glass two bottom blowdown valves are required on boilers operating at pressures above______ psi - answer 100 extra heavy steel pipe is required on a boiler bottom blowdown line when the pressure is above ____ psi - answer 125 package boilers are programmed to _____ - answer ignite the burner in low fire there are________ sq ft of heating surface in a water tube 3 1/2" in diameter and 20' long - answer 18. to change 1 lb of water from and at212 °f into steam at atmospheric pressure,______ btu are necessary - answer 970. a surface condenser is one that______ - answer has circulating water flowing through the tubes and exhaust steam around the outside of the tubes a boiler is rated at 30,000 lb/hr and has a 5% blow down loss. The minimum size feed water pump to supply this boiler is ________ gal./hr. - answer 3795 three types of draft used in power plants are______ - answer natural, forest, and induced
in a water tube boiler, heat and gases of combustion pass______ - answer around the tubes when the burner is in high fire, the______ - answer air-fuel ratio is at maximum rate a boiler with a draft gauge showing a positive pressure indicates_____ - answer furnace pressure is above atmospheric pressure downcomer tubes are found _____ - answer in a water tube boiler a boiler connected in battery requires a free blowing drain between the two stop valves when the ______ - answer boiler has a manhole opening most furnace explosions are caused by _____ - answer failure to purge the furnace at startup baffles in the boiler are designed to direct gases of combustion for close contact with the ________ - answer boiler heating surface the overspeed tripping device on a steam turbine must be tripped when____ - answer shutting down the steam turbine one gallon of no. 6 fuel oil weighs approximately _______ lb. - answer
three types of boiler feed water pumps are _____ - answer reciprocating, centrifugal, and turbine
an accumulation test is used to determine_______ - answer safety valve capacity a water tube boiler has 250 tubes that are 20 ft long and 3" in diameter. if the boiler produces one BHP for every 10 sq ft of heating surface, the maximum BHP it will produce is________ BHP - answer 392 during a boiler inspection, the main steam stop valves are _______ - answer closed, locked, and tagged when a quick opening valve is used as a blowdown valve, it is located ______ - answer between the boiler and slow opening valve listing lovers on safety valves are used to_____ - answer manually test valves the frequency of performing a bottom blowdown is determined by ______ - answer boiler Water Analysis normally a water column and gauge glass should be blown down _____ - answer at the start of a shift in whenever and out of the water level a thermostatic trap opens when the____ - answer the Bellows contract an economizer located in the path of the gases of combustion increased boiler efficiency approximately 1% for each ___°f rise in feed water temperature - answer 10 the purpose of a vent on the open feedwater heater is to _____ - answer remove oxygen and non condensable gases
steam pressure gauges are calibrated in____ - answer pounds per square inch bottom blowdown lines are located______ - answer at the lowest part of the water side of the boiler sewer lines are protected from pressure and temperature by the _______ when blowing down a boiler - answer blowdown tank the upper connection to a gauge glasses closed. If the boiler has a normal water level, the level on the gauge glass will show _______ glass - answer full combustion controls on a boiler are used to _____ - answer control the air fuel ratio ceiling strips that warned of excessive radial tolerance are found on_____ - answer steam turbines pre-purge, air to fuel ratio, and post Purge of the burner are functions of the _______ - answer combustion controls a water column______ - answer reduces fluctuations of water in the gauge glass the low water fuel cutoff can be tested by _____ - answer allowing the water level to drop boilers that are equipped with air heaters and economizers usually have_____ draft fans - answer forced and induced
sup blowers are most commonly found ______ - answer on water tube boilers a duplex reciprocating feed water pump operates on the principle that the _______ - answer steam piston area must be 2 to 2 1/2 times larger than the water piston when testing the safety valve by hand, it is the accepted practice to have. _________ - answer at least 75% popping pressure before testing oxygen in a boiler drum causes. ________ - answer pitting __________ steam turbines allow condensate to be reclaimed for use in the system - answer condensing with water at a temperature of 212°f, 1 bhp is equivalent to the evaporation of 34.5 lb of water every ________ hour(s) - answer 1 in a closed feedwater heater, the _________ - answer Steam and water do not mix sensible heat is heat that ______ - answer changes the temperature of a substance but not its state when performing a hydrostatic test on a boiler, the safety valve must be. ________ - answer removed from the boiler and the opening blank or gagged if repairs are to be made on a safety valve, they must be made by the. _______/ - answer manufacturer of the safety valve or authorized representative
the proper way to stop a steam turbine when taking it off line is to _______ - answer trip the over speed device by hand approximately. _______^ of air is required to completely burn 1 lb of fuel oil - answer 15 lb in order to reduce the viscosity of a fuel oil, it's. _______ - answer temperature must be increased what are is prevented from backing up into the steam line on a deaerator ________ - answer an internal overflow or a loop seal a steam pressure gauge must have a range of at least. _______ - answer 1 1/2 time's the mawp electrostatic precipitators are used in the power plants to ________ - answer remove fly ash from gases of combustion valve located between the boiler and water column must be ______ - answer locked or sealed open the boiling point of water. ________ with an increase in pressure - answer increases a hole is drilled in the end of a staybolt _______ - answer to warn of a corroded stay when taking a boiler off line, a vacuum is prevented by. _____ - answer opening the air cock
the. _________ on the steam turbine functions as a limit switch - answer overspeed trip circulating water passes through a surface condenser. ________ - answer inside the tubes The Pour point of a fuel oil is. ________ - answer the lowest temperature at which oil will flow a condensate pump is located 75 ' below the feed water heater and its discharged gauge reads 75 PSI. The pressure at the inlet to the heater is. _______ psi - answer 42. a boiler burning fuel oil and using forced-draft requires. ________ cu ft a furnace volume per boiler horsepower - answer. a boiler evaporates 48,000 lb of steam/hr. it evaporates 12 lb of steam/sq ft of heating surface per hour. The boiler has _______ as ft of heating surface - answer 4000 a steam turbine exhaust end and condenser are prevented from excess pressure by ________ - answer the atmospheric relief valve at 0 psi, _______ btu are necessary to change 1 lb of water from and at 212°f into steam - answer 970. automatic toilets are program to ignite the burner ______ - answer in lowfire ________ boilers can operate at higher pressures than fire tube boilers - answer water tube
the first step when using a soot blower is ________ - answer open Steam line drain the purpose of a vent on an open feedwater heater is to _______ - answer remove air and other non condensable gases cooling water and steam are in in direct contact with each other in a(n) ________ condenser - answer surface a boiler with 3450 sq ft of heating surface design for 5 sq ft of heating surface / BHP has ________ hp - answer 690 a water column _________ - answer dampens fluctuating water level a closed feedwater heater is always installed. ________ - answer on the discharge side of the feed water pump _________ is required for combustion - answer atomization of fuel, oxygen, and Heat heating value of natural gas is expressed in _______ - answer therms
- answer spalling in a boiler occurs in the_______ - answer combustion chamber economizers are used in Plants to _____ - answer heat feedwater using gases of combustion fuel oil with a high viscosity_______ - answer it's hard to pump
