California Registered Dental Assistant (RDA) Written Practice Exam

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What is the purpose of a fulcrum?

  1. To increase movement

  2. To provide stability to the hand

  3. To enhance grip strength

  4. To reduce pressure

The correct answer is: To provide stability to the hand

A fulcrum is a point of support or balance used in levers and other mechanical devices. It serves to increase movement and reduce pressure by distributing the weight and load evenly. Option A is incorrect because a fulcrum on its own cannot increase movement. Option C is incorrect because grip strength is determined by muscle strength, not the use of a fulcrum. Option D is incorrect because a fulcrum does not directly reduce pressure, but it helps to distribute weight and reduce strain on the hand by providing stability.

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