Ohio Stationary Steam Engineer Exam - Questions with Verified Answers

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Ohio Stationary Steam Engineer Exam - Questions with Verified Answers A boiler has carried a large slug of water over into steam. This condition is called: Priming How do steam separators work? they... cause a sudden change in direction that throws water out On a pressure gauge what is the minimum size piping that can be used? 1/4" if copper 1/2" if steel When may copper tubing not be used? over 406 degrees What common type of expansion joint is used universally throughout a steam distribution system? U-bend What type of steam trap contains a piston and a valve? an impulse trap For maximum efficiency what is true about superheated steam? a constant superheated steam temp is desirable A superheater safety valve relieves how much of the total steam produced by the boiler? 20% What is the purpose of a water screen? prevent slagging What is required if the boiler pressure is greater than or equal to 400 psig? 2 direct reading mechanical gauge glasses or one gauge glass and 2 remote level indications If you close the bottom blowdown valve on the water column and water fills up quickly to the center of the gauge glass, this is an indication that the water column piping is free of scale and sludge What might you find attached to the boilers water column? a feedwater regulating device What type of feedwater regulator is equipped with a fuel shut off? float type When water is added to a boiler, what will occur initially? the water level will drop What are you measuring in a 3 element control system? feedwater flow, steam flow, drum level What type of regulator is best for a boiler with wide pressure and load swings? 3 element When using a 3 element feedwater regulating system, which is the analog input? drum level How often should a makeup feedwater regulating system in a LP boiler be blown down? once per week A centrifugal pump is characterized by its: diffusion rings When starting a centrifugal pump the valve should be set with the suction open, discharge closed Lube oils should not give off volatile vapors at: 325-350 degrees A type of pump that uses the velocity of steam against a mass of water is a : Injector Calcium and magnesium are removed by what external water treatment process that can be regenerated using sodium chloride? zeolite softener What is the best way to get good water treatment results? combination of internal and external treatment How can temporary hardness be removed from water? -By heating water -By softening the water -by treating the water with sodium sulfite -either 1 or 2 What pH value shows alkalinity? 9 A boiler has been under stress for an extended period of time with high alakalinity concentration maintained in the water. This can cause? caustic embrittlement What condition caused by improper water treatment may be remedied by maintaining proper alkalinity? foaming.carryover What test is used to measure hardness? SOAP TEST What water test uses a color comparison? Phosphate When must a boiler have 2 bottom blowdown valves? if the pressure is higher than 100 psi What is the maximum pressure for which a seatless type blowdown valve can be used? 450 psi What system is directly piped into your boiler flash tank? continuous blowdown If you lay up a boiler for a short period of time, what concentration of caustic soda should be maintained in the boiler water? 400 ppm What flow measurement device uses a float in a tapered glass? Rotometer What is used to line the inside of the furnace? first-quality firebrick Incomplete combution is a cause of soot accumulation To what size is coal crushed for fluidized-bed boilers? to less than 1/4" How are fuel oil strainers normally configured? one strainer at the suction side of the pump and another just before the burner What would not cause your fuel oil burner to go out? heated fuel oil What type of pump is best suited for use with fuel oil burner system? positive displacement pump How often should the oil burner be cleaned on a HP boiler when firing heavy oils? once per shift When banking a fuel oil fired boiler what should you do? shut off the FD fan What is another name for a low gas pressure switch? Vaporstat When lighting a LP gas burner on a LP boiler, what is the last step? lift the manual reset valve The primary difference between a LP and a HP gas burner is? where the air and fuel are mixed What is the percentage of excess air needed for complete combustion when using a fuel oil burner? 3-15% What is the only way to know for sure how much carbon monoxide you have coming out of the stack? flue gas analysis When are soot blowers for heating surfaces used when firing coal? once per shift When are soot blowers on economizers and air preheaters used when firing coal? Daily What limits the amount of coal that may be burned per sqft of grate surface? the amount of combustion air that can be delivered by the FD fan When using a coal-fired boiler, what are the recommended percentages if underfire vs overfire air? 65%-35% When using soot blowers, what is the draft condition? -.10 to -.15 "of h20 What is the temperature limit of the preheated air when operating a stoker fired boiler? 350 degrees A wet scrubber that has been maintained properly has the capablility of absorbing ____% of SO2 in flue gases 90% [Show More]

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