The testing designed to confirm the results of the initial testing using identical testing devices and similar test conditions.
Foot
A measure of length equal to 12 inches, which term is taken from the average length of a human foot.
Foot candle
A unit of illuminance; equal to one lumen per square foot.
Foot pound
The amount of work done in raising one pound one foot.
Foot valve
A special type of check valve located at the bottom end of the suction pipe on a pump; it opens when the pump operates to allow water to enter the suction pipe but closes when the pump shuts off to prevent water from flowing out.
Foot-pound
Unit of work equal to the amount of energy needed to move a one-pound weight over a one-foot distance.
Footing
The base or bottom of a foundation pier, wall, or column that is usually wider than the upper portion of the foundation. The added width at the bottom spreads the load over a wider area.
Footing form
A wooden or steel form used to hold concrete to the desired shape and size until it hardens.
Footlambert
Measurement for the amount of light reflected which is described as the uniform lighting of a perfectly diffusing surface that reflects light at the rate of one Lumen per square foot. The number of footlamberts is measured by counting the number of foot-candles that reach the surface and by multiplying this figure by the amount of light reflecting on the surface.
Footprint
(1) An impression or mark made by a foot or shoe. (2) The amount of ground area used up by an object.
