boiler exam study guide 2| 300 QUESTIONS| WITH COMPLETE SOLUTIONS

The bottom blowdown on a boiler ___. correct answer: removes sludge and sediment from the mud drum Boiler tubes are sized using the ___. correct answer: outside diameter A boiler fusible plug is brass or bronze with a core of ___. correct answer: tin Spalling in a boiler refers to ___. correct answer: hairline cracks in the refractory Boiler horsepower is the evaporation of ___ lb of water/hr from and at a feedwater temperature of 212°F. correct answer: 34.5 A siphon installed between the boiler and the pressure gauge protects the Bourdon tube from___. correct answer: steam temperature The pH of the boiler water should be ___. correct answer: 10 to 11.5 The boiler superheater raises the temperature of the ___. correct answer: steam leaving the boiler An economizer is used to preheat ___. correct answer: feedwater Fires caused by spontaneous combustion would probably start in the ___. correct answer: oily waste rags A high suction reading on the fuel oil pressure gauge indicates ___. correct answer: dirty strainers The ___ is a secondary means of determining boiler water level. correct answer: try cock