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8 Cards in this Set
- Front
- Back
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As a general rule, the size of the condensate receiver should be large enough to hold a volume of condensate equal to the water evaporated by the boiler in a/an _____ hour period 1) Two 2) Three quarters 3) One 4) One and one half 5) One half |
One half |
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A float operated mechanical feeder valve should: 1) Not open until the level is well below the feed pump cut-in level 2) Not be deemed a stand-by device 3) Be located above the water column 4) Open just after the low-water cutoff switch opens 5) Be a normally closed valve |
Not open until the level is well below the feed pump cut-in level |
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Dissolved oxygen in condensate: 1) Can cause pitting on the return lines 2) Cannot be removed with chemicals 3) Necessitates the installation of a deaerator 4) Will cause pitting in a boiler 5) Causes grooving of the condensate lines |
Will cause pitting in a boiler |
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A condensate receiver low level cutoff switch will: 1) Act to close boiler fuel valve(s) 2) Sound an alarm 3) Cause the make-up valve to close 4) Stop the feed pump thereby preventing damage to it 5) Act to open a make-up solenoid |
Stop the feed pump thereby preventing damage to it |
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Neutralizing amines: 1) Can cause return grooving 2) Raise the pH of condensate 3) Absorb carbon dioxide 4) Eliminate boiler pitting 5) Lower the pH of boiler water |
Raise the pH of condensate |
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Heating plants with multiple boilers often have: 1) Separate condensate receivers 2) Individual feedwater systems 3) Feedwater pressure regulating valves for each boiler 4) A common feedwater control valve 5) Independent boiler feedwater controls from a header |
Independent boiler feedwater controls from a header |
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The Hartford loop will: 1) Prevent boiler water level from going below the lowest safe water level 2) Ensure continuous circulation of a hot water system 3) Prevent steam from entering a steam pressure gage 4) Prevent the draining of an expansion tank 5) Eliminate the need for venting a steam heating system |
Prevent boiler water level from going below the lowest safe water level |
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When a boiler equipped with a combination feedwater control and low water cutoff device shuts down due to a low water condition: 1) A manual reset switch must be used 2) It can be restarted by simply resetting the cutoff switch 3) The level must be restored to above the cutoff line before the unit can be restarted 4) A pre-purge will not be necessary 5) The feedwater flow will also stop |
The level must be restored to above the cutoff line before the unit can be restarted |
