Download 3rd class stationary steam engineer license prep exam 2025 with complete solution and more Exams Engineering in PDF only on Docsity!
Answer<>time, temperature, 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
3rd class stationary steam engineer license prep exam
2025 with complete solution
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<> an oil cooler is commonly used with a(n) when operating in conjunction with a turbo-generator - Answer<>steam turbine 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<> 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/ are necessary for complete combustion -
a allows condensate to pass through, but stops Steam. - Answer<>a steam trap
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<>
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<>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 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 balanced draft is - Answer<>constant furnace pressure slightly below atmospheric pressure a flame rod - Answer<>ensures that the gas pilot is lighted there are approximately btu in 1 cu ft of Natural Gas - Answer<> the pH of boiler water may be controlled by using - Answer<>caustic soda he steam line going to The Blowers is connected to the main -
a scotch Marine boiler is easily identified because it - Answer<>has a cylindrical internal furnace the air flow switch at the burner fan housing - Answer<>and shows the primary air fan is functioning the asme code recommends that low water fuel cutoff switch be tested by an evaporation test - Answer<>monthly a neutral solution is on the pH scale - Answer<> a dry pipe separator - Answer<>delivers higher-quality steam to the header draft is carefully controlled to - Answer<>completely burn fuel supplied to the burner draft is measured with a - Answer<>manometer 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<> 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<> 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
Answer<>check for the correct water level boiler should be warmed up slowly when starting up to - Answer<>allow uniform expansion of drums and tubes combustion requires - Answer<>fuel, oxygen, and Heat
after replacing a gauge glass but before placing it in service, it is necessary to 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<> the three most common fuels used in boilers are - Answer<>gas, fuel oil, and Coal incomplete combustion can be caused by - Answer<>insufficient air two bottom blowdown valves are required on boilers operating at pressures above psi - Answer<> extra heavy steel pipe is required on a boiler bottom blowdown line when the pressure is above psi - Answer<> 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 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
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<>8. three types of boiler feed water pumps are - Answer<>reciprocating, centrifugal, and turbine the most important fitting on a boiler is the - Answer<>safety valve viscosity of fuel oil is a - Answer<>measure of internal resistance to flow boiler water treatment is required to - Answer<>prevent scale formation on eating surfaces the safety valve - Answer<>prevents the boiler from exceeding its mawp try cocks I used to - Answer<>as a secondary means to determine water level a glass is used to - Answer<>indicate the water level in the boiler before using soap blowers, it is necessary to - Answer<>open the steam line on the soot blower safety valve repair should be done by the - Answer<>safety valve manufacturer or an authorized representative steam at a temperature of 350 degrees Fahrenheit and a pressure of 50 psi is - Answer<>superheated a duplex double-acting reciprocating feed water pump has - Answer<>to steam Pistons 2 to 2 2/2 times larger in area than the water piston 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<> 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
draft fans - Answer<>forced and induced baffles are used in the Steam and water drum of water tube boilers to - Answer<>prevent water carry over with the steam a closed feedwater heater is always installed - Answer<>on the discharge side of the feed water pump
if the chimney temperature is 250 degrees Fahrenheit higher than the Steam and water temperature, the boiler is - Answer<>not operating 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 when testing the safety valve by hand, it is the accepted practice to have. the purpose of a burner pressure control is to - Answer<>start and stop the burner firing cycle a gas pressure regulator is used to control the - Answer<>gas pressure at the burner the most controllable heat loss in a boiler is from the loss of heat in - Answer<>gases of combustion on the feed water line, the valve closest to the boiler shell is a valve - Answer<>stop four basic systems found on boilers are < - Answer<>steam, feed water, fuel, and draft if a low-water condition occurs, the operator should first - Answer<>secure the burners a pressure control on a boiler is used to. - Answer<>control the operating range of the boiler sup blowers are most commonly found - Answer<>on water tube boilers 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<> in a closed feedwater heater, the - Answer<>Steam and water do not mix
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<> 1/2 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 a valve that requires five 360° turns of the hand wheel to change from fully open to fully closed is a. valve - Answer<>slow opening a thermostatic steam trap opens when the - Answer<>Bellows contract a combustion control on a boiler. - Answer<>controls the air-fuel ratio when coal is classified, refers to hardness - Answer<>rank gauge glasses are used on boilers with precious exceeding 250 psi - Answer<>flat oxygen and non condensable gases are removed from feed water by -
Answer<>heating the water combustion is when all fuel is burned using only the theoretical amount of air - Answer<>perfect
