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Certified Nursing Assistant (CNA) — Written Exam

Infection control: practice questions

Our CNA bank has 14 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1

What should you do if you get stuck with a used needle?

  1. Wait until the end of the shift and then report it to the nurse
  2. Squeeze it and keep working
  3. Ignore it
  4. Wash the area with soap and water and report it immediately
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D. Wash the area with soap and water and report it immediately — Prompt follow-up is essential.

Question 2

What is the chain of infection's 'portal of exit'?

  1. The hospital door
  2. The microorganism itself
  3. The way a pathogen leaves the reservoir, such as through coughing or wounds
  4. The susceptible host
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C. The way a pathogen leaves the reservoir, such as through coughing or wounds — Breaking any link stops the spread.

Question 3

What is the single most important way to prevent the spread of infection?

  1. Wearing a gown
  2. Using a mask
  3. Opening windows
  4. Hand hygiene
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D. Hand hygiene — Clean hands before and after resident contact.

Question 4

Which precautions are used for MRSA or C. difficile?

  1. Airborne precautions (an N95 respirator)
  2. Droplet precautions
  3. No precautions
  4. Contact precautions (gown and gloves)
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D. Contact precautions (gown and gloves) — Use dedicated equipment when possible.

Question 5

When should gloves be worn?

  1. When contact with blood, body fluids, mucous membranes or broken skin is possible
  2. Never
  3. Only when cleaning floors
  4. At all times on duty, even when shaking hands or simply talking with residents
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A. When contact with blood, body fluids, mucous membranes or broken skin is possible — Change gloves between residents and tasks.

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