Boiler Operations and Design, Exams of Engineering

Download Boiler Operations and Design and more Exams Engineering in PDF only on Docsity! 3rd Class Stationary Steam Engineer License Prep Exam Questions With 100% Correct Answers 2024 _________ are necessary for complete combustion - Correct Answer-time, temperature, mixture, and atomization if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______ - Correct Answer-214.7 a boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The blowdown is______psi - Correct Answer-12 an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo-generator - Correct 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 - Correct Answer- superheated the economizer on a boiler is used to _______ - Correct Answer-add heat to the feed water blowers are normally used with________ boilers - Correct Answer-water tube overheating of tubes on a boiler can be caused by________ - Correct Answer-scale on tubes carbon dioxide in a condensate return system causes_________ - Correct Answer-channeling a ________ pump is a positive displacement pump - Correct Answer-reciprocating a boiler generating 6000 lb of steam/hr produces _______btu/hr - Correct Answer-6,000,000 a bottom blowdown is performed on a boiler to _____ - Correct Answer-discharge sludge and sediment the boiling point of water will____ with an increase in pressure - Correct Answer-be raised if a lather is not obtained when performing a soap hardness test, the water sample is_______ - Correct Answer-hard combustion efficiency can be increased when air is________ - Correct Answer-preheated ______ draft is produced by a fan located between the boiler and the chimney - Correct Answer-induced the overspeed trip on a steam turbine should be tested ______ - Correct Answer-before putting the steam turbine on- line a high CO2 reading in the gases of combustion is a sign of____ - Correct Answer-High combustion efficiency the purpose of chemically treating feedwater is to________ - Correct 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) _______. - Correct Answer- Loop seal or internal overflow a steam turbine operating at 3600 RPM will trip at_________ rpm - Correct Answer-3960 he steam line going to The Blowers is connected to the main ________ - Correct Answer-steam drum before using blowers on a boiler,________ - Correct Answer- drain set blower lines an accumulation of snow on the Fireside of a boiler tubes________ - Correct 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 - Correct 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 - Correct Answer-1 1/2 hard scale formed on the inside of tubes is best removed by________ - Correct Answer-air- or water-driven turbines to correct a low water condition,_____ - Correct Answer- secure fires desuperheater drain is used to_______ - Correct Answer- establish steam flow a sudden rise in chimney temperature with no increase in load indicates______ - Correct Answer-there is a broken baffle the btu content of natural gas is_____ - Correct Answer- 100,000 btu/therm the safety valve setting on the Steam and water drum is ________ a superheater safety valve - Correct Answer-higher than draft is carefully controlled to_____ - Correct Answer- completely burn fuel supplied to the burner draft is measured with a_________ - Correct Answer- manometer a ringelmann test is used to determine_______ - Correct Answer-smoke density a flame scanner proves (verifies) __________ - Correct Answer-pilot in Maine Flame according to the asme code, when warming up a boiler the air cock is closed when_______ - Correct Answer-the steam pressure gauge reads 25 psi a motor rated at 25 horsepower delivering 20 horsepower is operating at_______% capacity - Correct Answer-80 a deposit of scale or mud in an HRT boiler could cause_____ - Correct Answer-a bag to develop water wall tubes protect the refractory and_____ - Correct Answer-increase boiler heating surface steam at E250 psia and 400 degrees Fahrenheit is considered______ Steam - Correct Answer-saturated sensible heat is heat that_____ - Correct Answer-changes a substances temperature but not its state extra-heavy pipe must be used on blowdown lines when the steam pressure exceeds______ psi - Correct Answer-125 to check the water level on a boiler online, it is best to_____ - Correct Answer-blowdown the gauge glass a steam pressure gauge has a siphon between the boiler and the pressure gauge to _______ - Correct 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 - Correct Answer- 5000 oxygen in feed water causes ______ - Correct Answer-pitting it is permissible to have one blowdown valve on a boiler operated under______ psi - Correct Answer-100 at atmospheric pressure, water boils and turns to steam at _____ °f - Correct Answer-212 a steam pressure gauge is protected against excessive temperature by a ______ - Correct Answer-siphon the only type of safety valve allowed on a boiler by the asme code is a_____ safety valve - Correct Answer-spring-loaded pop the primary function of a boiler is to _____ - Correct Answer- generate steam efficiently if the burner is firing and no water is in the gauge glass, the best procedure to follow is to_______ - Correct Answer-shut down the burner and secure the boiler two bottom blowdown valves are required on boilers operating at pressures above______ psi - Correct Answer-100 extra heavy steel pipe is required on a boiler bottom blowdown line when the pressure is above ____ psi - Correct Answer-125 package boilers are programmed to _____ - Correct 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 - Correct Answer-18.32 to change 1 lb of water from and at212 °f into steam at atmospheric pressure,______ btu are necessary - Correct Answer-970.3 a surface condenser is one that______ - Correct 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. - Correct Answer-3795 three types of draft used in power plants are______ - Correct Answer-natural, forest, and induced in a water tube boiler, heat and gases of combustion pass______ - Correct Answer-around the tubes when the burner is in high fire, the______ - Correct Answer- air-fuel ratio is at maximum rate a boiler with a draft gauge showing a positive pressure indicates_____ - Correct Answer-furnace pressure is above atmospheric pressure downcomer tubes are found _____ - Correct Answer-in a water tube boiler a boiler connected in battery requires a free blowing drain between the two stop valves when the ______ - Correct Answer-boiler has a manhole opening most furnace explosions are caused by _____ - Correct Answer-failure to purge the furnace at startup baffles in the boiler are designed to direct gases of combustion for close contact with the ________ - Correct Answer-boiler heating surface the overspeed tripping device on a steam turbine must be tripped when____ - Correct Answer-shutting down the steam turbine one gallon of no. 6 fuel oil weighs approximately _______ lb. - Correct Answer-8.2 three types of boiler feed water pumps are _____ - Correct Answer-reciprocating, centrifugal, and turbine the most important fitting on a boiler is the______ - Correct Answer-safety valve listing lovers on safety valves are used to_____ - Correct Answer-manually test valves the frequency of performing a bottom blowdown is determined by ______ - Correct Answer-boiler Water Analysis normally a water column and gauge glass should be blown down _____ - Correct Answer-at the start of a shift in whenever and out of the water level a thermostatic trap opens when the____ - Correct 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 - Correct Answer-10 the purpose of a vent on the open feedwater heater is to _____ - Correct Answer-remove oxygen and non condensable gases steam pressure gauges are calibrated in____ - Correct Answer- pounds per square inch bottom blowdown lines are located______ - Correct 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 - Correct 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 - Correct Answer-full combustion controls on a boiler are used to _____ - Correct Answer-control the air fuel ratio ceiling strips that warned of excessive radial tolerance are found on_____ - Correct Answer-steam turbines pre-purge, air to fuel ratio, and post Purge of the burner are functions of the _______ - Correct Answer-combustion controls a water column______ - Correct Answer-reduces fluctuations of water in the gauge glass the low water fuel cutoff can be tested by _____ - Correct Answer-allowing the water level to drop boilers that are equipped with air heaters and economizers usually have_____ draft fans - Correct Answer-forced and induced baffles are used in the Steam and water drum of water tube boilers to _____ - Correct Answer-prevent water carry over with the steam a closed feedwater heater is always installed_______ - Correct Answer-on the discharge side of the feed water pump the purpose of a burner pressure control is to _____ - Correct Answer-start and stop the burner firing cycle a gas pressure regulator is used to control the ______ - Correct Answer-gas pressure at the burner sensible heat is heat that ______ - Correct Answer-changes the temperature of a substance but not its state when performing a hydrostatic test on a boiler, the safety valve must be. ________ - Correct 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. _______/ - Correct Answer-manufacturer of the safety valve or authorized representative the proper way to stop a steam turbine when taking it off line is to _______ - Correct Answer-trip the over speed device by hand approximately. _______^ of air is required to completely burn 1 lb of fuel oil - Correct Answer-15 lb in order to reduce the viscosity of a fuel oil, it's. _______ - Correct Answer-temperature must be increased what are is prevented from backing up into the steam line on a deaerator ________ - Correct Answer-an internal overflow or a loop seal a steam pressure gauge must have a range of at least. _______ - Correct Answer-1 1/2 time's the mawp electrostatic precipitators are used in the power plants to ________ - Correct Answer-remove fly ash from gases of combustion valve located between the boiler and water column must be ______ - Correct Answer-locked or sealed open the boiling point of water. ________ with an increase in pressure - Correct Answer-increases a hole is drilled in the end of a staybolt _______ - Correct Answer-to warn of a corroded stay when taking a boiler off line, a vacuum is prevented by. _____ - Correct Answer-opening the air cock a valve that requires five 360° turns of the hand wheel to change from fully open to fully closed is a. _______ valve - Correct Answer-slow opening a thermostatic steam trap opens when the ______ - Correct Answer-Bellows contract a combustion control on a boiler. _______ - Correct Answer- controls the air-fuel ratio when coal is classified, ________ refers to hardness - Correct Answer-rank _______ gauge glasses are used on boilers with precious exceeding 250 psi - Correct Answer-flat oxygen and non condensable gases are removed from feed water by ________ - Correct Answer-heating the water __________ combustion is when all fuel is burned using only the theoretical amount of air - Correct Answer-perfect ________ boilers can operate at higher pressures than fire tube boilers - Correct Answer-water tube the first step when using a soot blower is ________ - Correct Answer-open Steam line drain the purpose of a vent on an open feedwater heater is to _______ - Correct Answer-remove air and other non condensable gases cooling water and steam are in in direct contact with each other in a(n) ________ condenser - Correct Answer-surface a boiler with 3450 sq ft of heating surface design for 5 sq ft of heating surface / BHP has ________ hp - Correct Answer-690 a water column _________ - Correct Answer-dampens fluctuating water level a closed feedwater heater is always installed. ________ - Correct Answer-on the discharge side of the feed water pump _________ is required for combustion - Correct Answer- atomization of fuel, oxygen, and Heat heating value of natural gas is expressed in _______ - Correct Answer-therms - Correct Answer- spalling in a boiler occurs in the_______ - Correct Answer- combustion chamber economizers are used in Plants to _____ - Correct Answer- heat feedwater using gases of combustion fuel oil with a high viscosity_______ - Correct Answer-it's hard to pump boiler water is chemically treated to _____ - Correct Answer- prevent scale from forming on the boiler heating surfaces steam pressure gauges are calibrated in _____ - Correct Answer-pounds per square inch feed water temperature raised 10 degrees Fahrenheit from exhaustion or heat from gases of combustion result in an increase of ________% in plant efficiency - Correct Answer-1 the evaporation of 34.5 lb of water from and at 212°f is a standard for ______ - Correct Answer-1 bhp the tubes in a water tube boiler are fastened by ______ - Correct Answer-rolling and expanding in drums and headers a dry pipe separator in a boiler _______ - Correct Answer- maintains a high-quality Steam a (n) ________ valve offers the least resistance to flow - Correct Answer-gate if valves are installed between the boiler and water column, they must be _______ - Correct Answer-os&y or lever-type, locked or chained open overheating of tubes in a water tube boiler result if_________ - Correct Answer-scale builds up on the inside of the tubes complete combustion occurs when ______ - Correct Answer- all combustible material is burned with a minimum of excess air according to the asme code, the adjusting of safety valves should be done by the ______ - Correct Answer-manufacturer or authorized representative in a steam generating plant, the economizer is used to _______ - Correct Answer-heat feed water when testing a safety valve by hand, the pressure on the boiler should be at least ___________% are the safety valve set pressure - Correct Answer-75 heat absorbed by water when changing from liquid to steam at the boiling point is ______ - Correct Answer-latent heat to raise the temperature of 1 lb of water from 32°f to 212°f, ________ btu are needed - Correct Answer-180 baffles are placed between the tubes of a boiler to _________ - Correct Answer-direct the travel of gases of combustion in a pressure atomizing fuel oil burner, atomization of fuel oil is produced by the. _________ - Correct Answer-burner tip and high fuel oil pressure the steam Inlet connections of a condenser should be provided with. _______ - Correct Answer-an atmospheric relief valve when a hydrostatic test is performed on a boiler, each safety valve should be _____ - Correct Answer-blanked or gagged in a surface condenser, the cooling water _______ - Correct Answer-passes through the tubes a bypass damper on an air heater _______ - Correct Answer- prevent moisture from collecting at low firing rates the minimum size manhole is. ______ - Correct Answer-11" x 15" the diameter of a chimney may have to be increased. ___________ - Correct Answer-if the boiler smokes continually stay bolts are generally used on ______ - Correct Answer-fire tube boilers before draining a boiler, _______ - Correct Answer-allow the setting to cool cast iron water columns maybe use for pressures up to ______ psi. - Correct Answer-250 all high pressure boilers must have more than one method to determine water level : engaged glass and _______ - Correct Answer-try cocks if dry saturated steam at 200 PSI is passing through a reducing valve and is reduced to 25 psi, it is ________ - Correct Answer- superheated