Boiler operator stationary steam engineer exam

Boiler operator/ stationary steam engineer
exam.

what is used to keep SO2 down? - (correct answer) - wet and dry scrubbers
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a wet scrubber that has been maintained properly has the capability of absorbing ______
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% of the SO2 in the flue gas - (correct answer) - 90%
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Materials of construction of a flue gas scrubber system must be selected to resist what hostile conditi
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ons? - (correct answer) - low pH conditions and abrasion
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the efficiency of a spray pond or cooling tower is based on? - (correct answer) -
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wet bulb temperature or relative humidity of the ambient air
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when placing an induced draft cooling tower into service, which is the last step performed? -
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(correct answer) - start the i.d. fans
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when operating an induced draft cooling tower, which of the following statements is FALSE -
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(correct answer) -
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it is more economical to operate one fan at high speed than two fans at low speed
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what condition could be prevented by keeping the pH of water greater than 7? - (correct answer) -
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corrosion
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which chemical is often used to control algae accumulation in cooling towers? - (correct answer) -
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copper sulfate
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(LP) what is the minimum percentage of oxygen that must be present in a confined space before ente
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ring? - (correct answer) - 19.5%
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(LP) which of the following should you not tag and lock out when a boiler is shut down for inspection?
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- (correct answer) - top tri cock or boiler vent
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what is the first thing that must be done when starting up a brand new boiler? - (correct answer) -
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boil the boiler out
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which of the following is not done during a boiler start up? - (correct answer) -
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fill the boiler to the NOWL
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when starting a fire in a coal_fired boiler with chain grates or traveling grates, how much coal should
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be on the grates? - (correct answer) - 3-4 inches
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, when should a non-return valve be opened when putting a boiler on line? - (correct answer) -
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when the boiler pressure builds to 10 to 25 pose below the header pressure
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if a steam oiler is being taken out of service, what step should be taken first? - (correct answer) -
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operate the sootblowers
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(LP) when taking a boiler off-line what is the first step? - (correct answer) - secure the fire
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what is the last step to be performed when shutting down a boiler? - (correct answer) -
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close the feedwater supply valve
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when taking a boiler out of service, what is one thing you do not do? - (correct answer) -
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close the vent
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how long may the operator be away from the boiler - (correct answer) -
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the time it takes to go from 1/2 sight glass of water to no water showing
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how long does it usually take for the boiler water level to go from half a glass to no water showing? -
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(correct answer) - 2-8 min
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how often should the flame scanner be tested? - (correct answer) - weekly
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(LP) when testing a safety valve manually on a low-pressure boiler, how long do you hold it open? -
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(correct answer) - 5-10 seconds
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with a tubular gauge glass, how do you warm up the glass - (correct answer) -
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open the drain valve and crack open the steam valve
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bad washers in a low pressure boiler's gauge glass - (correct answer) -
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can cause a false water level reading in the gauge glass
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what can you do to find the water level if the gauge glass is broken - (correct answer) -
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open the tri cocks individually
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if a priming situation occurs, what should you do? - (correct answer) -
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reduce the firing rate and blow the boiler down to gain control of the water level
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if the boiler is priming so badly that you cannot see the water level, what action should be taken? -
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(correct answer) - close the main steam stop valve long enough to determine the water level
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the water level in a steam boiler has been proven to be low. what step should be taken first? -
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(correct answer) - stop the fuel and air suppies
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if you have a boiler tube leak, what is your primary concern? - (correct answer) -
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cutting other tubes in the boiler
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