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Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...
This confirms that the license holder meets prescribed standards of competence. Workers who require such licenses to practice include doctors, lawyers, nurses, civil engineers, and surveyors. State Certification: is generally necessary in order to obtain a license to practice an occupation. The certification requirements include passing of a ...
Some states may require a written examination for a license, while others may require several years of field experience as a student or intern, or both. The requirements regarding who must be licensed may include uncommon or strange licenses; for example, four states require licensing for interior designers . [ 4 ]
Material handling equipment (MHE) is mechanical equipment used for the movement, storage, control, and protection of materials, goods and products throughout the process of manufacturing, distribution, consumption, and disposal. [1]
Hoist may refer to: . Hoist (device), a machine for lifting loads Hoist controller, a machine for raising and lowering goods or personnel by means of a cable; Hydraulic hooklift hoist, another machine
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The Occupational Safety and Health Administration sets regulations for all equipment. [3] Contractors are forced to uphold usually strict rules to ensure safety of workers. All machinery is required to be developed by a certified engineer, contractors must follow manufacturer procedures, all users be professionally trained before operating equipment, and equipment must be inspected regularl