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

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License Prep Exam Questions And

Answers

_________ 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 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

License Prep Exam Questions And

Answers

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, a bottom blowdown 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

License Prep Exam Questions And

Answers

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 ✅blowdown the gauge glass a continuous blowdown line is located___ - - correct answer ✅in the Steam and water drum well below the nowl 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

License Prep Exam Questions And

Answers

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

License Prep Exam Questions And

Answers

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/ 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, btu/therm the safety valve setting on the Steam and water drum is ________ a superheater safety valve - - correct answer ✅higher than

License Prep Exam Questions And

Answers

the btu 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_____btu in 1 cu ft of Natural Gas - - correct answer ✅ 1000

License Prep Exam Questions And

Answers

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

License Prep Exam Questions And

Answers

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

License Prep Exam Questions And

Answers

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 a high pressure boiler operates at a pressure above______ PSI and 6 BHP - - correct answer ✅ 15 a safety valve on a boiler pops______ - - correct answer ✅between working pressure and mawp in a fire tube boiler, the Heat and gases of combustion pass _________ - - correct answer ✅through the tubes 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 mawp a steam trap ______ - - correct answer ✅automatically remove sand and water without loss of steam

License Prep Exam Questions And

Answers

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

License Prep Exam Questions And

Answers

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

License Prep Exam Questions And

Answers

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. three types of boiler feed water pumps are _____ - - correct answer ✅reciprocating, centrifugal, and turbine

License Prep Exam Questions And

Answers

safety valve repair should be done by the________ - - correct answer ✅safety valve manufacturer or an authorized representative steam at a temperature of 350 degrees Fahrenheit and a pressure of 50 psi is______ - - correct answer ✅superheated a duplex double-acting reciprocating feed water pump has____ - - correct answer ✅to steam Pistons 2 to 2 2/2 times larger in area than the water piston an accumulation test is used to determine_______ - - correct 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 -

• correct answer ✅ 392 during a boiler inspection, the main steam stop valves are _______
• • correct answer ✅closed, locked, and tagged

License Prep Exam Questions And

Answers

when a quick opening valve is used as a blowdown valve, it is located ______ - - correct answer ✅between the boiler and slow opening 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