3rd Class Stationary Steam Engineer License Prep Exam Questions and Answers, Exams of Classical Mechanics

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_________ 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. A boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The blow down 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 _______but/hr. - Correct answer 6,000, a bottom blow down is performed on a boiler to _____ - Correct answer discharge sludge and sediment

water columns are connected to the boiler with a minimum of _______" pipe - Correct answer 1 The minimum size of a water column blow down valve is_______". - Correct answer 3/ The maximum size bottom blow down valve on a boiler is_________". - Correct answer 2 1/ A ________ allows condensate to pass through, but stops Steam. - Correct answer a steam trap when taking over a shift, the first thing to do is check the________ - Correct answer water level in each boiler according to the same code, a high-pressure boiler having more than 500 square feet of heating surface shall have________ - Correct answer two or more safety valves the probable cause of an increase in temperature of gases of combustion at the boiler Outlet is____ - Correct answer dirty heating services boilers in battery equipped with________ must have two main steam stop valves and a free-flowing drain between them - Correct answer manhole openings in order to be sure the gauge glass is indicating an accurate water level reading, the stationary engineer should______ - Correct answer blow down the gauge glass a continuous blow down line is located___ - Correct answer in the Steam and water drum well below the now a temperature reading of 80 degrees Celsius is equal to_________°f - Correct answer 176 a chimney temperature of 250 degrees Fahrenheit above steam temperature indicates_______ - Correct answer poor efficiency a manometer is red in________ - Correct answer inches of water the boiling point of water will____ with an increase in pressure - Correct answer be raised

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 but content of natural gas is_____ - Correct answer 100,000 but/thermo the safety valve setting on the Steam and water drum is ________ a superheated safety valve - Correct answer higher than The but content of number 6 fuel oil is approximately - Correct answer 18750 BTU / lb. chemicals can be added to a boiler by a______pump - Correct answer proportioning the feed water stop valve is found between the____ - Correct answer boiler and check valve sensible heat is______ - Correct answer heat that can be measured with a thermometer balanced draft is______ - Correct answer constant furnace pressure slightly below atmospheric pressure a flame rod_______ - Correct answer ensures that the gas pilot is lighted there are approximately_____but in 1 cu ft. of Natural Gas - Correct answer 1000 the pH of boiler water may be controlled by using ______ - Correct answer caustic soda boiler water with a pH of 11 is________ - Correct answer alkaline a scotch Marine boiler is easily identified because it_____ - Correct answer has a cylindrical internal furnace

the air flow switch at the burner fan housing________ - Correct answer and shows the primary air fan is functioning the same code recommends that low water fuel cutoff switch be tested by an evaporation test__________ - Correct answer monthly a neutral solution is_______ on the pH scale - Correct answer 7 a dry pipe separator _____ - Correct answer delivers higher-quality steam to the header draft is carefully controlled to_____ - Correct answer completely burn fuel supplied to the burner draft is measured with a_________ - Correct answer manometer a rangeland test is used to determine_______ - Correct answer smoke density a flame scanner proves (verifies) __________ - Correct answer pilot in Maine Flame according to the same 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 Pisa 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 blow down lines when the steam pressure exceeds______ psi - Correct answer 125

as steam pressure in a boiler increases, there is a corresponding increase in the ______ - Correct answer temperature of steam and water the safety valve on a boiler _____ - Correct answer prevents the boiler from exceeding its map a steam trap ______ - Correct answer 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______ - Correct answer O before lighting off a boiler during a cold startup, the operator must first______ - Correct answer check for the correct water level boiler should be warmed up slowly when starting up to ______ - Correct answer allow uniform expansion of drums and tubes combustion requires____ - Correct answer fuel, oxygen, and Heat the three most common fuels used in boilers are _____ - Correct answer gas, fuel oil, and Coal incomplete combustion can be caused by ______ - Correct answer insufficient air after replacing a gauge glass but before placing it in service, it is necessary to ______ - Correct answer crack open the steam valve in warm the gauge glass two bottom blow down valves are required on boilers operating at pressures above______ psi - Correct answer 100 extra heavy steel pipe is required on a boiler bottom blow down 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.

to change 1 lb. of water from and at212 °f into steam at atmospheric pressure,______ but are necessary - Correct answer 970. 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 down comer 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 over speed 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. three types of boiler feed water pumps are _____ - Correct answer reciprocating, centrifugal, and turbine

listing lovers on safety valves are used to_____ - Correct answer manually test valves the frequency of performing a bottom blow down 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 feed water heater is to _____ - Correct answer remove oxygen and non-condensable gases steam pressure gauges are calibrated in____ - Correct answer pounds per square inch bottom blow down 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 blow down 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 feed water 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 if the chimney temperature is 250 degrees Fahrenheit higher than the Steam and water temperature, the boiler is _______ - Correct answer not operating efficiently the most controllable heat loss in a boiler is from the loss of heat in______ - Correct answer gases of combustion on the feed water line, the valve closest to the boiler shell is a _____ valve - Correct answer stop four basic systems found on boilers are ______< - Correct answer steam, feed water, fuel, and draft if a low-water condition occurs, the operator should first _______ - Correct answer secure the burners A pressure control on a boiler is used to. _______ - Correct answer control the operating range of the boiler sup blowers are most commonly found ______ - Correct answer on water tube boilers

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 stay bolt _______ - 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 Water tube boilers require less water than. _________ boilers - Correct answer fire tube A boiler equipped with a draft gauge and registering a negative pressure indicates. _________ - Correct answer atmospheric pressure is greater than furnace pressure

pressure atomizing burners atomized fuel oil using _______ - Correct answer a nozzle The. _________ on the steam turbine functions as a limit switch - Correct answer over speed trip Circulating water passes through a surface condenser. ________ - Correct answer inside the tubes The Pour point of a fuel oil is. ________ - Correct 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 - Correct answer 42. A boiler burning fuel oil and using forced-draft requires. ________ cu ft. a furnace volume per boiler horsepower - Correct 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 - Correct answer 4000 a steam turbine exhaust end and condenser are prevented from excess pressure by ________ - Correct answer the atmospheric relief valve at 0 psi, _______ but are necessary to change 1 lb. of water from and at 212°f into steam - Correct answer 970. automatic toilets are program to ignite the burner ______ - Correct answer in low fire ________ 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 feed water heater is to _______ - Correct answer remove air and other non-condensable gases

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 soy or lever-type, locked or chained open steam withdrawn from a steam turbine under pressure control is __________ Steam - Correct answer extraction in a closed feed water heater, the_______ - Correct answer Steam and water do not mix a compound gauge registers ________% - Correct answer either vacuum or pressure a Norse that analyzer measures _________ in gases of combustion - Correct answer carbon dioxide, oxygen, and carbon monoxide the pyrite analyzer can be used to measure - Correct answer oxygen automatic combustion controls on a boiler control _______ - Correct answer Fuel and air ratio if the firing rate increases on a boiler equipped with a convection type superheated, the superheated temperature will________ - Correct answer increase a thermostatic steam trap can be used _________ - Correct answer on high or low pressure systems heat that changes the temperature of a substance but not its state is_________ - Correct answer sensible heat _________is carrying over particles of water with the steam - Correct answer priming

if a boiler is equipped with an automatic non-return valve, it must be _______ - Correct answer the valve closest to the boiler shell a broken baffle on a water tube boiler would cause ________ - Correct answer increase in chimney temperature a feed water pump will become steam bound if the ________ - Correct answer water temperature in the open feed water heater is too high 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 same 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, ________ but 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

feed water is treated chemically before it enters the boiler drum to ________ - Correct answer change scale forming salts to a non-adhering sludge