MLT Medical Laboratory Technician
Practice Test 2026 – 25 Exam Questions
with Verified Answers & Explanations
Question 1
Which of the following anti-coagulants acts by chelating calcium and requires immediate mixing
after collection?
A. Heperin.
B. EDTA.
C. Sodium citrate.
D. Oxilate.
Answer. B.
EDTA binds calcium to prevent clotting and must be mixed gently after draw to avoid micro clots
and platelet clumping.
Question 2
What is the best action if a serum sample appears hemalyzed after centrifugation?
A. Report the result.
B. Freeze and respin.
C. Reject and request a redraw.
D. Add more anti-coagulant.
Answer C.
Himmolysis interferes with many analytes. The specimen is considered compromised and a
redraw is usually required.
Question 3
Which test result is most affected by prolonged tourniquet application?
A point/INNR
B electrolytes
C hematocrit
D platelet count.
Answer C.
, Hemocentration due to prolonged tourniquet use increases hematocrit and protein levels
artificially.
Question 4
What is the primary purpose of daily quality control in hematology?
A. Detect specimen contamination.
B. Ensure calibration is accurate.
C. Prevent patient misidentification.
D. Confirm analyzer reliability.
Answer D.
Daily QC ensures the analyzer is producing valid and consistent results before testing patient
samples.
Question 5
What is the major interference in spectrophototric assays due to lipenia?
A. Increased light scatter.
B decreased enzyme activity.
C. Reduced pH.
D. Altered sample viscosity?
Answer. A.
Lepemic sample scatter light leading to inaccurate readings and spectrophototric analysis.
Question 6
Which stain is used to identify reticulos sites in peripheral blood?
A. Right gima.
B. Sudan black. B.
C. New methylene blue.
D. Prussian blue.
Answer C.
New methylene blue precipitates RNA in reticulos sites allowing their visualization.
Question 7
A shift in the Levy Jennings control chart indicates.
A random error.
Practice Test 2026 – 25 Exam Questions
with Verified Answers & Explanations
Question 1
Which of the following anti-coagulants acts by chelating calcium and requires immediate mixing
after collection?
A. Heperin.
B. EDTA.
C. Sodium citrate.
D. Oxilate.
Answer. B.
EDTA binds calcium to prevent clotting and must be mixed gently after draw to avoid micro clots
and platelet clumping.
Question 2
What is the best action if a serum sample appears hemalyzed after centrifugation?
A. Report the result.
B. Freeze and respin.
C. Reject and request a redraw.
D. Add more anti-coagulant.
Answer C.
Himmolysis interferes with many analytes. The specimen is considered compromised and a
redraw is usually required.
Question 3
Which test result is most affected by prolonged tourniquet application?
A point/INNR
B electrolytes
C hematocrit
D platelet count.
Answer C.
, Hemocentration due to prolonged tourniquet use increases hematocrit and protein levels
artificially.
Question 4
What is the primary purpose of daily quality control in hematology?
A. Detect specimen contamination.
B. Ensure calibration is accurate.
C. Prevent patient misidentification.
D. Confirm analyzer reliability.
Answer D.
Daily QC ensures the analyzer is producing valid and consistent results before testing patient
samples.
Question 5
What is the major interference in spectrophototric assays due to lipenia?
A. Increased light scatter.
B decreased enzyme activity.
C. Reduced pH.
D. Altered sample viscosity?
Answer. A.
Lepemic sample scatter light leading to inaccurate readings and spectrophototric analysis.
Question 6
Which stain is used to identify reticulos sites in peripheral blood?
A. Right gima.
B. Sudan black. B.
C. New methylene blue.
D. Prussian blue.
Answer C.
New methylene blue precipitates RNA in reticulos sites allowing their visualization.
Question 7
A shift in the Levy Jennings control chart indicates.
A random error.
