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23 Cards in this Set
- Front
- Back
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A boiler rated for hot water service at 120 (psig) and 240F maximum would be constructed under the rules of which code? |
ASME section IV |
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Which directive boiler is built with a firebox that is not completely surrounded by water? |
Firebox boiler |
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Which boiler consists of an arrangement of drums and headers interconnected by tubes? |
Watertube |
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How many fans are used to control the draft through a balanced draft boiler? |
Two: one on the inlet and one on the outlet |
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Which boiler would be classified as a firebox boiler? |
HRT |
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What is the minimum clearance required in front of an access panel on a gas-fired boiler? |
24” regardless of whether it is insulated or not |
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What does the installer have to do with the boiler and piping systems before turning them over to the owner? |
Inspect and test for leak tight service |
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What is the cause of the most common problems encountered after start-up of steam boilers and systems? |
Improper cleaning and flushing |
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What is likely to occur if there is a heavy concentration of dissolved or suspended particles in the boiler water? |
The water may foam and could cause priming |
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What should be done if the water in the sight glass is not clear after cleaning and flushing? |
Repeat the cleaning procedure |
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What should be done with the results of all pertinent test results during the test, start and balance phases of system start up? |
Record the results and have the results verified |
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Where is the appliances gross rating taken? |
Boiler nozzle outlet |
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Where is the appliances net rating taken? |
Heat emission units |
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What does the term pass in a boiler terminology mean? |
The number of times the products of combustion travel the length of the boiler is |
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What is the main advantage of steam over hydronic systems? |
Speed of transmission |
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What is the usual maximum circulation speed of water for a low temperature hot water heating system? |
4 feet per second |
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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 had the ability to respond to sudden demands of large volumes of steam for a short period of time? |
Firetube |
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Which boiler has the ability to handle wide variations in load over a long period of time? |
Watertube |
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Why is clean condensate considered to be ideal for feeding back into the boiler? |
Condensate is essentially distilled water, so it contains no dissolved solids |
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How often should a pop test be done on a safety valve used in an LP steam heating boiler? |
Annually |
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What is the suggested method of determining whether water is flowing through a water feeder valve? |
Listen with a stethoscope |
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What is the most probable cause of the water level in a gauge glass fluctuating rapidly? |
Foaming or priming inside the boiler |
