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19 Cards in this Set
- Front
- Back
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A boiler which will start and stop without human help once a start-up is initiated is termed b) self regulating c) automatic d) modulating controlled unite packaged |
c) Automatic |
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The maximum energy input to a hot water supply boiler is a) 454 L per minute b) 58.7 kW c) 20,000 BTU d) 127 Imperial gallons per minute 587 kW |
b) 58.7 kW |
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For horizontal firetube boilers, the lowest visible water level in the gage glass is set not less than __________ above the highest point of the tubes a) 2 inches b) 3 inches c) 50 mm d) 1 inch e) 25 mm |
b) 3 inches |
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A low pressure steam boiler is one which operates a) at an energy input above 58.7 kW b) above 103 kPa c) above 121 degrees C d) above 1100 kPa e) at or below 103 kPa |
e) at or below 103 kPa |
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A device used on smaller heating boilers to measure water"head" or height is the a) gage glass b) header c) pressure gage d) siphon e) altitude gage |
e) altitude gage |
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An example of a boiler fitting would be a a) temperature controller b) forced draft fan c) combustion chamber d) drum e) sootblower |
a) temperature controller |
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An induced draft fan handles a) air from the combustion process b) air going to the combustion process c) flue gases going to the combustion process d) flue gases from the combustion process e) fuel gases from the combustion process |
d) flue gases from the combustion process |
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The lowest permissible water level of a power boiler is a) 25 mm below the lowest visible water line b) 50 mm below the lowest visible water line c) 25 mm above the fireline d) 50 mm below the fireline e) 76 mm below the visible water line |
b) 50 mm below the lowest visible water line |
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A device which must be replaced each time it performs its function is the a) low water fuel cut-off b) high steam pressure limiting control c) safety valve d) blowoff valve e) rupture disk |
e) rupture disk |
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On older boilers the brickwork which tended to surround the furnace was termed a) the boiler firebox b) refractory c) the setting of the boiler d) the boiler casing e) the windbox |
c) the setting of the boiler |
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A device which usually uses air or steam to do its job is the a) siphon b) operating control c) burner d) sootblower e) try cock |
d) sootblower |
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A boiler component which surrounds the burner of most boilers is the a) waterleg b) stack c) uptake d) windbox e) refractory |
d) windbox |
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The low water cut-off is a device fitted to the boiler to shut the a) feed water supply off, if the fuel supply is too low b) feed water supply off, if the steam pressure becomes too high c) feedwater supply off, if the boiler temperature becomes too high d) fuel valve off if the water level becomes too high e) fuel valve off if the water level becomes too low |
e) fuel valve off if the water level becomes too low |
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Manholes are openings through which a person can a) enter the boiler furnace b) inspect the boiler uptake c) enter the boiler shell or drum d) enter and inspect the steam header e) enter the ash hopper |
c) enter the boiler shell or drum |
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A furnace baffle is a) used to prevent the fire from striking the tubes b) installed to direct the hot flue gases c) used to prevent the water from surging d) used to deflect the flame e) installed to prevent carryover |
b) installed to direct the hot flue gases |
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The windbox of a boiler is a) where the fuel and air are mixed for combustion b) what the forced draft fan is installed into c) the collector of the exhaust gases before they go into the uptake d) the ductwork surrounding the burners on the outside of the boiler into which the air for the burners is introduced e) always maintained under a negative pressure |
d) the ductwork surrounding the burners on the outside of the boiler into which the air for the burners is introduced |
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A check valve a) allows flow in one direction only b) regulates the flow of feedwater to the boiler c) is used to isolate the steam gage d) is not considered a fitting e) will "pop" open when pressure inside the drum reaches a set point |
a) allows flow in one direction only |
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A steam gage a) indicates the level of water in a boiler b) is not considered a boiler fitting c) indicates the internal pressure of the boiler d) is required on power boilers only e) will reset once the boiler pressure has dropped |
c) indicates the internal pressure of the boiler |
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STUDY NEXT CHAPTER GOGO!! |
FIRETUBE BOILER!!!!!!!! :) |
