Boiler Operator/ Stationary Steam Engineer Exam

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