Laboratory Operations practice questions

10 questions · Untimed · Explanation after each question

Quality control and Westgard rules, regulation and proficiency testing, safety, laboratory math and instrumentation; the MLS adds management and education principles. Laboratory Operations is 5–10% of the MLT exam and 5–10% of the MLS exam.

Line drawing of an eyewash station, a sharps container, a fire extinguisher and a blank clipboard

Before you start

Every question has four options and one correct answer. Each explanation says why the answer is right and why the most tempting wrong answer is wrong.
Check each answer to see the explanation before moving on. Checked answers cannot be changed.

Original practice questions written to the ASCP BOC MLT and MLS Examination Content Guidelines (revised June 9, 2026), not ASCP exam questions. Independent practice, not affiliated with or endorsed by the American Society for Clinical Pathology (ASCP), the ASCP Board of Certification or Pearson VUE. MLT(ASCP) and MLS(ASCP) are ASCP BOC credentials.