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!

Practice this question and more.

Which of the following needles has the widest lumen?

#21 gauge
#23 gauge
#19 gauge
#18 gauge

The correct answer is: #19 gauge

A #21 gauge needle has a smaller diameter than a #19 gauge needle, making it a not an appropriate choice for the widest lumen. A #23 gauge needle is even smaller than a #21 gauge and again, not the correct choice for the widest lumen. A #18 gauge needle is larger than a #19 gauge, but it is not the largest of the options given, making it an incorrect choice. The correct answer, #19 gauge, has the widest lumen out of the four options provided.