Stationary Engineer Exam Questions And Answers

Stationary Engineer Exam Questions And Answers How much clearance from the top of the boiler is needed for a HP boiler that produces 70000 lbs of steam? - ANS 7 feet On a gas fired boiler what is the proper gas to air mixture - ANS 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? - ANS 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? - ANS Once a Shift With 24 hr operation how often do you check the water level? - ANS Once per shift How often do you check the LWCO? - ANS Once per shift How often do you check the High Limit Switch? - ANS 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? - ANS GPM= V (diameter squared) divided by .4085 ANSWER pg 469 BOG What controls the amount of blowback on a safety valve? - ANS Blowback ring or adjusting ring On a open air expansion tank hot water boiler system; how high should it be mounted? - ANS (4 Feet ) above the highest heating element. What is the minimum top clearance of boilers with manholes? - ANS 5 feet Package boilers; steam heating boilers and hot water heating boilers shall have a minimum clearance of? - ANS 2 feet from ceiling. Code chapter 10 page76 Most important safety device on a boiler? - ANS Safety relief valve What does a Black Liquor Boiler do? - ANS Black Liquor is the by product of wood pulp processing in the paper making industry. What does Black liquor boiler known for? - ANS Steam generation and recovery of soda ash Maximum line voltage for control on a boiler? - ANS 150 volts