Boiler operator/ stationary steam engineer exam questions and answers 100% pass

Boiler operator/ stationary steam engineer exam questions and answers 100% pass 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 if a priming situation occurs, what should you do? reduce the firing rate and blow the boiler down to gain control of the water level if the boiler is priming so badly that you cannot see the water level, what action should be taken? close the main steam stop valve long enough to determine the water level the water level in a steam boiler has been proven to be low. what step should be taken first? stop the fuel and air suppies if you have a boiler tube leak, what is your primary concern? cutting other tubes in the boiler if a watertube boiler experiences a tube rupture, which actions should be taken stop the fuel feed and shut down the boiler immediately if you have a fire in a pulverizer what action should be taken? reduce the air supply to the pulverizer what should be done before relighting a pulverized coal-fired boiler after a flame failure? regulate the air flow to 10% and wait 5 minutes which of the following is slow deformation of metal over time under continual stress and high temp? creep what condition does graphitization cause in boiler steel? makes the steel weaker which non-destructive testing method is used to expose surface and near-surface flaws using a dust or iron particles? magnetic particle testing which of the following is a protrusion on a tube? bag what is blistering of boiler metal? separation of metal into layers which statement is true about welding performed on boilers? all welding on a boiler must meet ASME code and must be approved by an authorized inspector prior to repairs being made. what is the minimum sq ft of heating surface at which you must have a license to operate the boiler? 360 sq ft what must you do if your boiler license is still valid and you lose it submit and affidavit stating the circumstance give a reason why the state can not take away your boiler operator license. poor health if your license expires, how long do you have to renew it before you must retest? there is no grace period when should your license be renewed each year? by the expiration date shown on the license where must your license be displayed? in a conspicuous place in the boiler or turbine room when upgrading your license to a higher level, what must be done with the previous license? turn it in to the state. if you are found in violation of licensing rules, what is the first warning you will receive? written warning an impulse turbine utilizes one row of stationary nozzle which increase the velocity of the steam enough to drive two rows of rotating blades. this type of turbine is called a(n) velicoty-compounded turbine a steam turbine that operates at 500 psi is considered high pressure ( 150 psi and less is low pressure, 151-400 is medium pressure, over 400 is high pressure) considering the limitation on material of construction of a steam turbine, what is the maximum temp of steam that may be used? 1100F what is the maximum acceptable level of dissolved solids in the steam being supplied to a steam turbine 0.1 ppm what is the proper temp for turbine bearings during normal operation 140-150F the proper procedure for cleaning a turbine oil cooler is : place the entire tube bundle in a cleaning tank which of the following is FALSE about required properties of lubricating oil in a turbine? oil must be able to mix with water in what type of turbine lubricating oil filtration system is oil removed at intervals and replaced with new or reconditioned oil? makeup system if a turbine has begin spinning and heat is being generated in the bearings at what temp should you add cooling water to the bearings? 110-120F what is the function of a dashpot, as part of a steam turbine governor? to prevent overtravel due to the weight of the governor linkage what is the most economical way to partially load a small steam turbine? use the minimum number of hand-controlled steam nozzles feasble which of the following is a yearly inspection for a steam turbine inspect oil and steam atomizers which of the following would cause vibrations in a turbine? improper air gap in the generator? when a steam turbine is to be shut down, what step should be taken first? gradually reduce the load to zero what is the pressure above which the exhaust side of a steam turbine and the connected piping may be protected by either a safety valve or rupture disc or a combination of the two 15 psi of the following locations, where must a drain valve be installed between the main steal line and the turbine throttle valve what type of steam turbine has steam take-offs prior to going to the condenser? extraction if extraction steam from a turbine is used in a feedwater heater, what kind of steam is it? superheated steam what supplies the condensate pump on a surface condenser? hot well when a steam turbine is operated condensing, what type valve is placed between the condenser and the turbine atmospheric relief valve