Stationary Engineer Exam Questions with Correct Answers

Stationary Engineer Exam Questions with Correct Answers ________ _______ boilers recover exaust from a gas turbine to produce usful steam. - ANSWER-waste heat .________ are used instead of elbows on water column piping to allow for internal inspection. - ANSWER-Crosses .________ usually causes cavities to form at grain boundaries and these cavities coalesce to form a crack. - ANSWER-CREEP ._________ is used on high pressure steam plants to absorb oxygen. It is not typically used on low pressure plants because it is a slow reaction to absorb oxygen. - ANSWER-Hydrazine .__________ ________ boilers recover heat in the exaust from a gas turbine to produce usefull steam - ANSWER-WASTE HEAT .__________ _________ is used to internally remove oxygen from the boiler. - ANSWER-sodium sulfite .__________ are added to the boiler to prevent steam line and condensate line corrosion. These chemicals are used because they will blow off with the steam. - ANSWER-amines .__________ blowdown lowers the TDS level in the boiler. - ANSWER-surface .__________ is the lowest grade of coal; has a claylike appearance and a heating value range of _______ to _______btu's per lb. - ANSWER-Lignate 7000 to 11000 btu's per lb .___________ ___________Sell steam to local industrial plants and surplus electric to local utilities - ANSWER-COGENERATION PLANTS .___________ is when water impurities leave the boiler with the steam. - ANSWER-carryover ._____________tubes contain cooler desending water replenish water to riser tubes - ANSWER-Downcomber .____________prevents the tube ends from being overheated - ANSWER-Beading .??????____ cubic inches in 1 gallon - ANSWER-231 .#2 fuel oil is classified as _________ domestic fuel oil. - ANSWER-medium .#4 fuel oil has about________ btu's per lb. - ANSWER-18 .#6 fuel oil is also known as?? - ANSWER-Bunker C .1 boiler hp is equivalent to the evaporation of _____ pounds of steam an hour. - ANSWER-34.5 lbs .2 methods of supporting an HRT - ANSWER-1.) lug and roller 2.) overhead suspension .2 or more saftey valves are required on a boiler with a heating surface inexcess of ______square feet or electric imput of ________KW - ANSWER-500 sq ft ; 500KW .2 types of electric boilers - ANSWER-RESISTANCE and ELECTRODE .8 foot length of tube or shell can take up to_% sag or bend and still be used without replacing . - ANSWER-2% .80 inlet and 30 out 2" pipe. - ANSWER-25 inlet 3"pipe .A _______ _______ is constructed of flat plates reffered to as a tubesheet and a tubecap sheet. - ANSWER-BOX HEADER .A _________ is a gelatin like sustance that has very small particles in suspension. These particles are usually less than ___ microns in size. - ANSWER-colloidal 0.2 .A _____________ test is used to determine smoke density. - ANSWER-Ringlemann .A ______________ measures the difference in: pressure between two points and measures draft. - ANSWER-Manometer .A ________thermometer uses two dissimilar metals that bend predictably with a change in temp. - ANSWER-BIMETALIC .A 2" pipe was found to be delivering water at 100 psia at 1040ft per second. How many gallons per hour will it deliver? - ANSWER-GPM= V (diameter squared) divided by .4085 ANSWER pg 469 BOG .A 8 foot length of tube or shell can take up to ___% sag or bend and still be used without replacing? - ANSWER-2% .A base is a compound that yields __________ ions and has a pH value greater than 7. - ANSWER-hydroxyl .A black liquor boiler requires what percentage of solids of fuel to maintain proper combustion? - ANSWER-58% .A blister is caused by what ? - ANSWER-Slag inclusion forming a lamination at the time the plate was rolled at the steel mill. A blister is a separation of the metal from the shell plate caused by impurities rolled into the shell plate when formed. .A blowdown valve is located at the lowest water space of a boiler for three purposes - ANSWER-1. to remove precipitated sludge or loose scale n2. To permit rapid lowering of the boiler water if it has become too high accidentally n3. As a means of removing water from the boiler so that fresh water may be added to keep the concentration of solids below the point where difficulties may be experienced. .A boiler operating at a pressure of 65 lbs; what is the smallest size feed & blow off connections if the safety valve is set at 90 psi? - ANSWER-1/2 feed & 3/4 blow off .A boiler operating at a pressure of 65lbs. What is the smallest size feed and blow off connections if the safety valve is set at 90 psi? - ANSWER-½ " feed ¾ " blow off .A boiler should have 1 spring loaded pop-type safety valve and it must exceed the output lb's per hour & fuel capacity but not raise above - ANSWER-5 psi of the MAWP or 6%. .A boiler system has a single boiler supplying 160 psi steam; what valves are necessary? - ANSWER-an OS&Y shutoff valves are required on both supply and return. .A boiler water having high Alkalinity could develop - ANSWER-Caustic Embrittlement .A boiler water having high Alkalinity could develop. - ANSWER-Caustic Embrittlement .a boiler with a seperate furnace area that is usually built of refractory brick - ANSWER-externally fired firetube boiler .A condition that occurs when steam bubbles are generated so quickly from a boiler heating surface that a layer of steam is formed between the water and the heating surface. - ANSWER-steam blanketing .A control that operates from steam pressure is of what type? - ANSWER-ON/OFF control .A control that operates from steam pressure is of what type? - ANSWER-ON/OFF control .A COPES feedwater regulator is an example of a ________ ____________type feedwater regulator. - ANSWER-thermostatic mechanical .A cross or tee connection to the boiler drum used eclusivly for attaching a test pressure guage is known as - ANSWER-inspectors connection