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Fume hoods were introduced about 100 years ago to safeguard personnel working with hazardous materials. While many changes and improvements have been made, the basic concept and design of fume hoods remains the same. Air is drawn from the workplace, around the worker and into the front of the hood, and is then exhausted out of the laboratory.
Periodic fume hood function inspections require the measurement of capture or face velocity [a] with an anemometer. [13]: 359 Specialized instruments for measuring wind speed in a fume hood or in ductwork are often referred to by trade names that indicate the mechanism of measurement, such as "velometer" and "vaneometer".
A fume hood is an example of an engineering control that uses local exhaust ventilation combined with an enclosure to isolate a worker from airborne gasses or particulates. Ventilation systems are distinguished as being either local or general.
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These devices can commonly be found in the fume hoods of chemistry labs, [2] in facilities handling deadly pathogens, in NASA [3] Moon rock handling facilities and in industrial applications. Inert atmosphere glove boxes are also used for painting and sandblasting. [4]
A motorcycle fork is the portion of a motorcycle that holds the front wheel and allows one to steer. For handling, the front fork is the most critical part of a motorcycle. The combination of rake and trail determines how stable the motorcycle is. The 'fork' on a motorcycle consists of multiple components.
Hood: the rubber brake lever covering on bikes with drop style handle bars Hub : the core of a wheel; contains bearings and, in a traditional wheel, has drilled flanges for attachment of spokes Hub dynamo : a generator inside one of the hubs for powering lights or other accessories
List of motorcycles by type of engine is a list of motorcycles by the type of motorcycle engine used by the vehicle, such as by the number of cylinders or configuration.. A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the direction of travel.
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