Download 3rd class stationary steam engineer license prep questions with complete solutions |2024 and more Exams Electrical Engineering in PDF only on Docsity!
3rd class stationary steam engineer license prep questions
with complete solutions LATEST 2024
_________ are necessary for complete combustion - ANS time, temperature, mixture, and atomization if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______ - ANS
a boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The blowdown is______psi - ANS 12 an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo-generator - ANS 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 - ANS superheated the economizer on a boiler is used to _______ - ANS add heat to the feed water blowers are normally used with________ boilers - ANS water tube overheating of tubes on a boiler can be caused by________ - ANS scale on tubes carbon dioxide in a condensate return system causes_________ - ANS channeling a ________ pump is a positive displacement pump - ANS reciprocating a boiler generating 6000 lb of steam/hr produces _______btu/hr - ANS 6,000, a bottom blowdown is performed on a boiler to _____ - ANS discharge sludge and sediment water columns are connected to the boiler with a minimum of _______" pipe - ANS 1 the minimum size of a water column blowdown valve is_______". - ANS 3/ the maximum size bottom blowdown valve on a boiler is_________". - ANS 2 1/ a ________ allows condensate to pass through, but stops Steam. - ANS a steam trap
when taking over a shift, the first thing to do is check the________ - ANS 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________ - ANS two or more safety valves the probable cause of an increase in temperature of gases of combustion at the boiler Outlet is____ - ANS dirty heating services boilers in battery equipped with________ must have two main steam stop valves and a free-flowing drain between them - ANS manhole openings in order to be sure the gauge glass is indicating an accurate water level reading, the stationary engineer should______ - ANS blowdown the gauge glass a continuous blowdown line is located___ - ANS in the Steam and water drum well below the nowl a temperature reading of 80 degrees Celsius is equal to_________°f - ANS 176 a chimney temperature of 250 degrees Fahrenheit above steam temperature indicates_______ - ANS poor efficiency a manometer is red in________ - ANS inches of water the boiling point of water will____ with an increase in pressure - ANS be raised if a lather is not obtained when performing a soap hardness test, the water sample is_______ - ANS hard combustion efficiency can be increased when air is________ - ANS preheated ______ draft is produced by a fan located between the boiler and the chimney - ANS induced the overspeed trip on a steam turbine should be tested ______ - ANS before putting the steam turbine on-line a high CO2 reading in the gases of combustion is a sign of____ - ANS High combustion efficiency the purpose of chemically treating feedwater is to________ - ANS 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) _______. - ANS Loop seal or internal overflow
the pH of boiler water may be controlled by using ______ - ANS caustic soda boiler water with a pH of 11 is________ - ANS alkaline a scotch Marine boiler is easily identified because it_____ - ANS has a cylindrical internal furnace the air flow switch at the burner fan housing________ - ANS and shows the primary air fan is functioning the asme code recommends that low water fuel cutoff switch be tested by an evaporation test__________ - ANS monthly a neutral solution is_______ on the pH scale - ANS 7 a dry pipe separator _____ - ANS delivers higher-quality steam to the header draft is carefully controlled to_____ - ANS completely burn fuel supplied to the burner draft is measured with a_________ - ANS manometer a ringelmann test is used to determine_______ - ANS smoke density a flame scanner proves (verifies) __________ - ANS pilot in Maine Flame according to the asme code, when warming up a boiler the air cock is closed when_______ - ANS the steam pressure gauge reads 25 psi a motor rated at 25 horsepower delivering 20 horsepower is operating at_______% capacity - ANS 80 a deposit of scale or mud in an HRT boiler could cause_____ - ANS a bag to develop water wall tubes protect the refractory and_____ - ANS increase boiler heating surface steam at E250 psia and 400 degrees Fahrenheit is considered______ Steam - ANS saturated sensible heat is heat that_____ - ANS changes a substances temperature but not its state extra-heavy pipe must be used on blowdown lines when the steam pressure exceeds______ psi - ANS 125
to check the water level on a boiler online, it is best to_____ - ANS blowdown the gauge glass a steam pressure gauge has a siphon between the boiler and the pressure gauge to _______ - ANS 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 - ANS 5000 oxygen in feed water causes ______ - ANS pitting it is permissible to have one blowdown valve on a boiler operated under______ psi - ANS 100 at atmospheric pressure, water boils and turns to steam at _____ °f - ANS 212 a steam pressure gauge is protected against excessive temperature by a ______ - ANS siphon the only type of safety valve allowed on a boiler by the asme code is a_____ safety valve - ANS spring-loaded pop the primary function of a boiler is to _____ - ANS generate steam efficiently if the burner is firing and no water is in the gauge glass, the best procedure to follow is to_______ - ANS shut down the burner and secure the boiler a high pressure boiler operates at a pressure above______ PSI and 6 BHP - ANS 15 a safety valve on a boiler pops______ - ANS between working pressure and mawp in a fire tube boiler, the Heat and gases of combustion pass _________ - ANS through the tubes as steam pressure in a boiler increases, there is a corresponding increase in the ______ - ANS temperature of steam and water the safety valve on a boiler _____ - ANS prevents the boiler from exceeding its mawp a steam trap ______ - ANS automatically remove sand and water without loss of steam the amount of excess air in gases of combustion is normally determined by the analysis of______ - ANS O before lighting off a boiler during a cold startup, the operator must first______ - ANS check for the correct water level
a boiler connected in battery requires a free blowing drain between the two stop valves when the ______ - ANS boiler has a manhole opening most furnace explosions are caused by _____ - ANS failure to purge the furnace at startup baffles in the boiler are designed to direct gases of combustion for close contact with the ________ - ANS boiler heating surface the overspeed tripping device on a steam turbine must be tripped when____ - ANS shutting down the steam turbine one gallon of no. 6 fuel oil weighs approximately _______ lb. - ANS 8. three types of boiler feed water pumps are _____ - ANS reciprocating, centrifugal, and turbine the most important fitting on a boiler is the______ - ANS safety valve viscosity of fuel oil is a________ - ANS measure of internal resistance to flow boiler water treatment is required to____ - ANS prevent scale formation on eating surfaces the safety valve______ - ANS prevents the boiler from exceeding its mawp try cocks I used to________ - ANS as a secondary means to determine water level a glass is used to ______ - ANS indicate the water level in the boiler before using soap blowers, it is necessary to______ - ANS open the steam line on the soot blower safety valve repair should be done by the________ - ANS safety valve manufacturer or an authorized representative steam at a temperature of 350 degrees Fahrenheit and a pressure of 50 psi is______ - ANS superheated a duplex double-acting reciprocating feed water pump has____ - ANS to steam Pistons 2 to 2 2/2 times larger in area than the water piston an accumulation test is used to determine_______ - ANS 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 - ANS 392 during a boiler inspection, the main steam stop valves are _______ - ANS closed, locked, and tagged when a quick opening valve is used as a blowdown valve, it is located ______ - ANS between the boiler and slow opening valve listing lovers on safety valves are used to_____ - ANS manually test valves the frequency of performing a bottom blowdown is determined by ______ - ANS boiler Water Analysis normally a water column and gauge glass should be blown down _____ - ANS at the start of a shift in whenever and out of the water level a thermostatic trap opens when the____ - ANS 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 - ANS 10 the purpose of a vent on the open feedwater heater is to _____ - ANS remove oxygen and non condensable gases steam pressure gauges are calibrated in____ - ANS pounds per square inch bottom blowdown lines are located______ - ANS 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 - ANS 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 - ANS full combustion controls on a boiler are used to _____ - ANS control the air fuel ratio ceiling strips that warned of excessive radial tolerance are found on_____ - ANS steam turbines pre-purge, air to fuel ratio, and post Purge of the burner are functions of the _______ - ANS combustion controls a water column______ - ANS reduces fluctuations of water in the gauge glass
with water at a temperature of 212°f, 1 bhp is equivalent to the evaporation of 34.5 lb of water every ________ hour(s) - ANS 1 in a closed feedwater heater, the _________ - ANS Steam and water do not mix sensible heat is heat that ______ - ANS changes the temperature of a substance but not its state when performing a hydrostatic test on a boiler, the safety valve must be. ________ - ANS 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. _______/ - ANS manufacturer of the safety valve or authorized representative the proper way to stop a steam turbine when taking it off line is to _______ - ANS trip the over speed device by hand approximately. _______^ of air is required to completely burn 1 lb of fuel oil - ANS 15 lb in order to reduce the viscosity of a fuel oil, it's. _______ - ANS temperature must be increased what are is prevented from backing up into the steam line on a deaerator ________ - ANS an internal overflow or a loop seal a steam pressure gauge must have a range of at least. _______ - ANS 1 1/2 time's the mawp electrostatic precipitators are used in the power plants to ________ - ANS remove fly ash from gases of combustion valve located between the boiler and water column must be ______ - ANS locked or sealed open the boiling point of water. ________ with an increase in pressure - ANS increases a hole is drilled in the end of a staybolt _______ - ANS to warn of a corroded stay when taking a boiler off line, a vacuum is prevented by. _____ - ANS 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 - ANS slow opening a thermostatic steam trap opens when the ______ - ANS Bellows contract
a combustion control on a boiler. _______ - ANS controls the air-fuel ratio when coal is classified, ________ refers to hardness - ANS rank _______ gauge glasses are used on boilers with precious exceeding 250 psi - ANS flat oxygen and non condensable gases are removed from feed water by ________ - ANS heating the water __________ combustion is when all fuel is burned using only the theoretical amount of air - ANS perfect water tube boilers require less water than. _________ boilers - ANS fire tube a boiler equipped with a draft gauge and registering a negative pressure indicates. _________ - ANS atmospheric pressure is greater than furnace pressure pressure atomizing burners atomized fuel oil using _______ - ANS a nozzle the. _________ on the steam turbine functions as a limit switch - ANS overspeed trip circulating water passes through a surface condenser. ________ - ANS inside the tubes The Pour point of a fuel oil is. ________ - ANS 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 - ANS
a boiler burning fuel oil and using forced-draft requires. ________ cu ft a furnace volume per boiler horsepower - ANS. 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 - ANS 4000 a steam turbine exhaust end and condenser are prevented from excess pressure by ________ - ANS the atmospheric relief valve at 0 psi, _______ btu are necessary to change 1 lb of water from and at 212°f into steam - ANS 970. automatic toilets are program to ignite the burner ______ - ANS in lowfire
a dry pipe separator in a boiler _______ - ANS maintains a high-quality Steam a (n) ________ valve offers the least resistance to flow - ANS gate if valves are installed between the boiler and water column, they must be _______ - ANS os&y or lever-type, locked or chained open steam withdrawn from a steam turbine under pressure control is __________ Steam - ANS extraction in a closed feedwater heater, the_______ - ANS Steam and water do not mix a compound gauge registers ________% - ANS either vacuum or pressure a Norse that analyzer measures _________ in gases of combustion - ANS carbon dioxide, oxygen, and carbon monoxide the fyrite analyzer can be used to measure - ANS oxygen automatic combustion controls on a boiler control _______ - ANS Fuel and air ratio if the firing rate increases on a boiler equipped with a convection type superheater, the superheater temperature will________ - ANS increase a thermostatic steam trap can be used _________ - ANS on high or low pressure systems heat that changes the temperature of a substance but not its state is_________ - ANS sensible heat _________is carrying over particles of water with the steam - ANS priming if a boiler is equipped with an automatic non-return valve, it must be _______ - ANS the valve closest to the boiler shell a broken baffle on a water tube boiler would cause ________ - ANS increase in chimney temperature a feed water pump will become steam bound if the ________ - ANS water temperature in the open feedwater heater is too high overheating of tubes in a water tube boiler result if_________ - ANS scale builds up on the inside of the tubes complete combustion occurs when ______ - ANS 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 ______ - ANS manufacturer or authorized representative in a steam generating plant, the economizer is used to _______ - ANS 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 - ANS 75 heat absorbed by water when changing from liquid to steam at the boiling point is ______ - ANS latent heat to raise the temperature of 1 lb of water from 32°f to 212°f, ________ btu are needed - ANS 180 baffles are placed between the tubes of a boiler to _________ - ANS direct the travel of gases of combustion in a pressure atomizing fuel oil burner, atomization of fuel oil is produced by the. _________ - ANS burner tip and high fuel oil pressure the steam Inlet connections of a condenser should be provided with. _______ - ANS an atmospheric relief valve when a hydrostatic test is performed on a boiler, each safety valve should be _____ - ANS blanked or gagged in a surface condenser, the cooling water _______ - ANS passes through the tubes a bypass damper on an air heater _______ - ANS prevent moisture from collecting at low firing rates the minimum size manhole is. ______ - ANS 11" x 15" the diameter of a chimney may have to be increased. ___________ - ANS if the boiler smokes continually stay bolts are generally used on ______ - ANS fire tube boilers before draining a boiler, _______ - ANS allow the setting to cool cast iron water columns maybe use for pressures up to ______ psi. - ANS 250 all high pressure boilers must have more than one method to determine water level : engaged glass and _______ - ANS try cocks
