Stationary Engineer exam |628 questions| with correct answers

How much clearance from the top of the boiler is needed for a HP boiler that produces 70000 lbs of steam? CORRECT ANSWER 7 feet On a gas fired boiler what is the proper gas to air mixture CORRECT ANSWER 30%-70% and in special arrangements it can be as high as 100% . ANSWER CHAPTER 11 remember% What is the total hardness in a system that was found to have calcium hardness of 60ppm and magnesium hardness of 18ppm and carbon hardness of 12 ppm? CORRECT ANSWER TH=(Ca x 2.5) + (Mg x 4.1)nTH=(60 x 2.5) + (18 x 4.1)nTH= 150+73.8 =( 223.8 PPM) How often should a complete external inspection of the boiler be done? CORRECT ANSWER Once a Shift With 24 hr operation how often do you check the water level? CORRECT ANSWER Once per shift How often do you check the LWCO? CORRECT ANSWER Once per shift How often do you check the High Limit Switch? CORRECT ANSWER Annually A 2" pipe was found to be delivering water at 100 psia at 1040ft per second. How many gallons per hour will it deliver? CORRECT ANSWER GPM= V (diameter squared) divided by .4085 ANSWER pg 469 BOG What controls the amount of blowback on a safety valve? CORRECT ANSWER Blowback ring or adjusting ring