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Phlebotomy Technician Certification

Laboratory tests: practice questions

Our Phlebotomy bank has 26 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 is a sweat chloride test used to diagnose?

  1. Heart attack (myocardial infarction)
  2. Cystic fibrosis
  3. Diabetes
  4. Hepatitis
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B. Cystic fibrosis — Sweat is collected after stimulation.

Question 2

Which test monitors warfarin therapy?

  1. aPTT (heparin therapy)
  2. CBC
  3. PT/INR
  4. A1c
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C. PT/INR — Collected in a light blue tube.

Question 3

What is the purpose of a blood culture?

  1. To measure glucose
  2. To check cholesterol
  3. To detect bacteria or fungi in the blood (bacteremia or sepsis)
  4. To count red cells
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C. To detect bacteria or fungi in the blood (bacteremia or sepsis) — Volume and timing affect accuracy.

Question 4

What does a CBC (complete blood count) measure?

  1. Red cells, white cells, platelets, hemoglobin and hematocrit
  2. Cholesterol, triglycerides, and fasting blood glucose levels for the panel
  3. Blood type
  4. Liver enzymes only
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A. Red cells, white cells, platelets, hemoglobin and hematocrit — Collected in a lavender tube.

Question 5

What is a blood smear used for?

  1. Typing blood
  2. Measuring cholesterol and triglyceride levels
  3. Examining blood cells under a microscope
  4. Measuring glucose
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C. Examining blood cells under a microscope — A thin smear is made on a glass slide.

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