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19 Cards in this Set
- Front
- Back
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How many fans are used to control the draft for a balanced draft boiler |
Two one on the inlet and one on the outlet |
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Boiler with no fans is called |
Natural draft boiler |
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What does the installer have to do to the boiler and the piping system before turning them over to the owner |
Inspect and test for a leak tight Service |
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Where is the gross rating taken |
Boiler nozzle outlet |
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Where is the net rating taken from |
Heat emissions unit |
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What's the advantage of steam over hydraulic systems |
Speed of transmission |
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What is usually the maximum circulating speed of water for a low temperature hot water heating system |
4 feet per second |
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Which type of low temperature heating boiler may be used for either low pressure steam heating or for hot water heating |
Conventional cast iron heating boiler |
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What does load tracking refer to when discussing boilers |
The ability of a boiler to respond to changes in steam or hot water demand |
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Which boiler has the ability to respond to certain demands for large volumes of steam for a short period of time |
Fire tube |
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What is the minimum size of a boilers in line for a boiler having less than a hundred square foot of heating surface |
Three quarters of an inch |
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What is the piece of pipe between the return header and blow off valve called |
Blow off line |
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A backflow preventer should be used in what degree of hazard |
High |
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What is the program for steam header pipe |
One quarter per foot or 2% |
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What is the minimum air gap allowed in a 3/8 diameter opening |
1 inch it has to be twice the amount but not less than 1 inch |
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What condition would require the installation of two RP devices to be installed parallel ahead of the system isolation valve |
Installation requires 24 hours uninterrupted service |
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How should a minimum capacity rating for your safety valve to be installed on a boiler compared to the data provided on the boiler rating plate |
Equal to or greater than the maximum heat output rating |
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When should a compound gauge for use instead of a pressure gauge |
On systems and they operate at pressures less than standard atmosphere |
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How often should a pop test be done on the safety valve and a low pressure heating boiler |
Annually |
