Nationally Registered Certified Medical Assistant (NRCMA) (NAHP) Practice Exam

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Study for the Nationally Registered Certified Medical Assistant Exam. Prepare with interactive quizzes and multiple-choice questions that come with helpful hints and explanations. Get ready to earn your certification with confidence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What substance is used to prevent x-ray exposure?

Plastic
Lead
Rubber
Copper

The correct answer is: Lead

Lead is used as a protective barrier against x-ray exposure due to its high density and ability to absorb x-rays. Plastic, rubber, and copper are not as effective as lead in preventing x-ray exposure. Plastic and rubber are not dense enough to absorb x-rays, and copper does not have as high of a density as lead. Additionally, plastic and rubber may even increase the amount of exposure by allowing scattering of x-rays, and copper is more commonly used in electrical wiring rather than as a shielding material in x-rays.