TEXAS MEDICAL LABORATORY TECHNICIAN
LICENSE EXAM – PRACTICE QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which anticoagulant is used in lavender-top tubes for
hematology testing?
A. Sodium citrate
B. Heparin
C. EDTA
D. Potassium oxalate
Rationale: EDTA preserves cellular morphology, making it ideal
for CBC and hematology testing.
2. Which organization sets laboratory safety standards?
A. FDA
B. OSHA
C. EPA
D. CAP
,Rationale: OSHA is responsible for workplace safety
regulations, including lab safety standards.
3. Which biosafety cabinet type provides both product and
personal protection by HEPA-filtered airflow?
A. Class I
B. Class II
C. Class III
D. Horizontal clean bench
Rationale: Class II cabinets protect both the user and the
specimen with HEPA-filtered airflow.
4. Which blood component is essential for clot formation?
A. RBCs
B. WBCs
C. Platelets
D. Plasma proteins
Rationale: Platelets aggregate and trigger clot formation.
5. A critical value should be:
A. Documented only
B. Immediately reported to the physician
,C. Reported within 24 hours
D. Ignored if repeated
Rationale: Critical values require immediate provider
notification.
6. The most common site for capillary collection in adults is:
A. Earlobe
B. Thumb
C. Finger (middle/ring finger)
D. Big toe
Rationale: Middle or ring fingers provide safe, adequate blood
flow for capillary sampling.
7. What is the primary function of the spleen?
A. Produce WBCs
B. Filter damaged RBCs
C. Produce clotting factors
D. Store platelets
Rationale: The spleen removes aging or abnormal red blood
cells.
8. A urine specimen for culture must be processed within:
, A. 6 hours
B. 3 hours
C. 2 hours
D. 1 hour
Rationale: Bacterial growth alters results; 2 hours is the
maximum acceptable delay.
9. Which test requires fasting?
A. CBC
B. Lipid panel
C. Electrolytes
D. PT/INR
Rationale: Lipid measurements (especially triglycerides)
require fasting for accuracy.
10. Which microorganism appears as Gram-positive cocci in
clusters?
A. Streptococcus
B. Enterococcus
C. Neisseria
D. Staphylococcus
Rationale: Staphylococcus species classically form grape-like
clusters.
LICENSE EXAM – PRACTICE QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which anticoagulant is used in lavender-top tubes for
hematology testing?
A. Sodium citrate
B. Heparin
C. EDTA
D. Potassium oxalate
Rationale: EDTA preserves cellular morphology, making it ideal
for CBC and hematology testing.
2. Which organization sets laboratory safety standards?
A. FDA
B. OSHA
C. EPA
D. CAP
,Rationale: OSHA is responsible for workplace safety
regulations, including lab safety standards.
3. Which biosafety cabinet type provides both product and
personal protection by HEPA-filtered airflow?
A. Class I
B. Class II
C. Class III
D. Horizontal clean bench
Rationale: Class II cabinets protect both the user and the
specimen with HEPA-filtered airflow.
4. Which blood component is essential for clot formation?
A. RBCs
B. WBCs
C. Platelets
D. Plasma proteins
Rationale: Platelets aggregate and trigger clot formation.
5. A critical value should be:
A. Documented only
B. Immediately reported to the physician
,C. Reported within 24 hours
D. Ignored if repeated
Rationale: Critical values require immediate provider
notification.
6. The most common site for capillary collection in adults is:
A. Earlobe
B. Thumb
C. Finger (middle/ring finger)
D. Big toe
Rationale: Middle or ring fingers provide safe, adequate blood
flow for capillary sampling.
7. What is the primary function of the spleen?
A. Produce WBCs
B. Filter damaged RBCs
C. Produce clotting factors
D. Store platelets
Rationale: The spleen removes aging or abnormal red blood
cells.
8. A urine specimen for culture must be processed within:
, A. 6 hours
B. 3 hours
C. 2 hours
D. 1 hour
Rationale: Bacterial growth alters results; 2 hours is the
maximum acceptable delay.
9. Which test requires fasting?
A. CBC
B. Lipid panel
C. Electrolytes
D. PT/INR
Rationale: Lipid measurements (especially triglycerides)
require fasting for accuracy.
10. Which microorganism appears as Gram-positive cocci in
clusters?
A. Streptococcus
B. Enterococcus
C. Neisseria
D. Staphylococcus
Rationale: Staphylococcus species classically form grape-like
clusters.
