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| Ballast efficacy factor
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The measure of the efficiency of fluorescent lamp ballasts. It is the relative light output divided by the power input. |
| Ballast factor
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The ratio of light output of a fluorescent lamp operated on a ballast to the light output of a lamp operated on a standard or reference ballast. |
| Ballast transformer
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Transformer that supplies voltage to the light tubes in a fluorescent light to provide a high starting voltage and then limiting the current. |
| Ballcock
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The fill valve that controls the flow of water from the water supply line into a gravity-operated toilet tank. It is controlled by a float mechanism that floats in the tank water. When the toilet is flushed, the float drops and opens the ballcock, releasing water into the tank and/or bowl. As the water in the tank is restored, the float rises and shuts off the ballcock when the tank is full. |
| Balled and burlap
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A method in which plants are sold where the roots of a plant have been lifted and wrapped in burlap to keep it together until transplanted. |
| Balloon bag
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Device that attaches to a garden hose & used to loosen a blockage in a clogged drain. |
| Balloon frame construction
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Type of framing used in two-story homes where one-piece studs extend from the foundation to the roof and form the walls of both stories. |
| Balloon framing
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The building-frame construction in which each of the studs is one piece from the foundation to the roof of a two-story house. |
| Balloon loan
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A mortgage in which the monthly payment is not intended to repay the entire loan. The final payment is a large lump sum of the remaining principal. |
| Balloon mortgage
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A mortgage with periodic installments of principal and interest that do not fully amortize the loan. The balance of the mortgage is due in a lump sum at a specified date, usually at the end of the term. |
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