Part of the medical lab pass
ASCP MLS practice exam: 100 questions in 2 hours 30 minutes
100 questions · 2 hours 30 minutes · Four options · Flag for review
The MLS(ASCP) format: 100 four-option questions in 2 hours 30 minutes, drawn in each content area’s share, with a score for every area and an explanation for every question.
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.
- Questions per area: 20 blood banking, 7 urinalysis, 20 chemistry, 20 hematology, 7 immunology, 19 microbiology, 7 laboratory operations, inside ASCP’s published ranges. The real exam is computer adaptive and reports a scaled score (100–999, pass at 400), so this mock reports your percentage correct and a score for every area instead.
- As on the ASCP exam, you answer each question before moving to the next and can flag questions; once every question is answered, you can go back, review and change answers until you submit. An onscreen calculator is allowed on the real exam, so use one. The clock keeps running in background tabs and reloads; when time runs out, your answers are submitted.
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.