Question

A device used for lifting or lowering objects suspended from a hook at the end of retractable chains or cable is called
1) hoist
2) jib crane
3) portable elevator
4) chain conveyor

Answer 1

Answer is 4

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Answer 2

Answer:

Concept:

The most common type is an elevator, which uses a hoist mechanism to raise and lower its car. Most hoists use lifting hooks to connect to their loads.

Explanation:

• A hoist is a tool used to raise or lower a load using a drum or liftwheel that rope or chain is wrapped around. It can be manually controlled, electrically or pneumatically powered, and it can hoist objects using chain, fibre, or wire rope. A lifting hook is used to secure the weight to the hoist.
• The term "hoist" is used to refer to a wide variety of machinery that lifts and lowers goods. For instance, a lot of people refer to an elevator as a "hoist." This information is specifically related to mine hoists, construction hoists, and overhead hoists.

Hence, hoist  is used to lift or lower objects suspended from a hook at the end of retractable chains or cable.

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