Free MLS(ASCP) Practice Questions
Original questions with explanations
These original MLS(ASCP) practice questions are educational examples designed to exercise reasoning. They are not recalled exam items and do not imply access to live or confidential test content.
Question 1
An antibody screen is positive before transfusion. What is the next priority?
- A. Release uncrossmatched blood routinely
- B. Change the patient type
- C. Identify the antibody and select compatible antigen-negative units as applicable
- D. Ignore the screen
Answer and explanation
C. Identify the antibody and select compatible antigen-negative units as applicable Unexpected antibodies require investigation and compatible component selection.
Question 2
Which pattern is most consistent with iron deficiency?
- A. Low ferritin with microcytic, hypochromic red cells
- B. High ferritin with macrocytosis
- C. Normal indices with blasts
- D. Isolated thrombocytosis only
Answer and explanation
A. Low ferritin with microcytic, hypochromic red cells Depleted iron stores and microcytosis are characteristic findings.
Question 3
A control exceeds its acceptable limit. What should happen?
- A. Delete the control
- B. Report patients anyway
- C. Stop reporting affected results and investigate according to procedure
- D. Change the limit
Answer and explanation
C. Stop reporting affected results and investigate according to procedure Unacceptable quality control must be resolved before reporting.
Question 4
Which specimen problem can falsely elevate potassium?
- A. Hemolysis
- B. Prompt separation
- C. Correct tube fill
- D. Proper transport
Answer and explanation
A. Hemolysis Cell rupture releases intracellular potassium.
Question 5
How should candidates use adaptive-exam practice?
- A. Skip weak sections
- B. Use live items
- C. Build consistent decisions across all domains rather than chase a fixed question order
- D. Memorize answer positions
Answer and explanation
C. Build consistent decisions across all domains rather than chase a fixed question order Adaptive testing samples performance according to the exam’s scoring model and blueprint.
How to Review Your Results
For every missed item, name the tested concept, explain why the correct option is best, and identify the clue that rules out each distractor. Then review the corresponding official content domain.