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11 Cards in this Set
- Front
- Back
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1. How much horsepower is needed to pump up to 900 feet of head from ground level and pumps 1250 gpm with an efficiency of 80%?
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FORMULA- 900 x 1250 x 8.33 x 1 / divided by 33000 x .80
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2. How much clearance from the top of the boiler is needed for a HP boiler that produces 70,000 lbs of steam
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ANSWER- 7 feet
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5. What is the recommended time for complete external inspection of the boiler?
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daily/weekly
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6. With 24 hr operation , how often do you check the water level?
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Once per shift
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7. How often do you check the LWCO?
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Once per shift
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8. How often do you check the High Limit Switch?
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Annually
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10. a 2” pipe was found to be delivering water at 100 psia at1040ft per second. How many gallons per hour will it deliver?
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GPM= V (diameter squared) /divided by .4085 ANSWER pg 469 BOG
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11. What controls the amount of blowback on a safety valve?
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adjusting ring
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12. On a open air expansion tank, hot water boiler system, how high should it be mounted?
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4feet above highest heating element
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13. What is the minimum top clearance of boilers with manholes?
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3 feet’, package boilers, steam heating boilers and hot water heating boilers shall have a minimum clearance of 2 feet from ceiling. Code chapter 10 page76
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14. Most important safety device?
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saftey valve
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