MLA 2026 Study Guide Medical Laboratory
Assistant Certification Practice Questions
Answer Explanations Specimen Collection
Processing Patient Safety Laboratory Procedures
Exam Preparation
SECTION 1: SPECIMEN COLLECTION FUNDAMENTALS (Questions 1–
25)
Question 1. What is the primary purpose of proper patient identification before
specimen collection?
A. To increase billing revenue
B. To prevent misidentification errors and ensure patient safety
C. To reduce staffing
D. To speed up testing
Answer: B. To prevent misidentification errors and ensure patient safety
Rationale: Proper patient identification is the most critical step in specimen
collection. Using at least two unique patient identifiers (e.g., full name and date of
birth) prevents misidentification errors that can lead to incorrect diagnosis and
treatment.
Question 2. Which two patient identifiers are acceptable for specimen collection
according to The Joint Commission?
A. Room number and bed number
B. Full name and date of birth
C. Patient's physical appearance and room number
D. Diagnosis and physician name
Answer: B. Full name and date of birth
,Rationale: The Joint Commission requires at least two unique patient identifiers.
Acceptable identifiers include full name, date of birth, medical record number, or
other unique identifiers. Room and bed numbers are not acceptable.
Question 3. When should a phlebotomist verify a patient's identification?
A. Only before the first draw of the day
B. Before, during, and after specimen collection
C. Only when the patient is asleep
D. Never
Answer: B. Before, during, and after specimen collection
Rationale: Patient identification should be verified at multiple points: before
collection, during collection, and after collection (when labeling specimens). This
ensures the correct specimen is collected and labeled.
Question 4. What is the correct order for verifying patient identification?
A. Ask the patient to state their name, then check the armband
B. Check the armband, then ask the patient to state their name
C. Ask the nurse for the patient's name
D. Check the room number only
Answer: A. Ask the patient to state their name, then check the armband
Rationale: The correct sequence is to ask the patient to state their full name (not
just yes or no), then verify against the armband or requisition. This active
verification reduces errors.
Question 5. What is the recommended antiseptic for routine blood collection?
A. Hydrogen peroxide
B. 70% isopropyl alcohol
C. Bleach
D. Soap and water
Answer: B. 70% isopropyl alcohol
,Rationale: 70% isopropyl alcohol is the standard antiseptic for routine blood
collection. It effectively reduces skin flora and is fast-acting. For blood cultures,
chlorhexidine or iodine may be preferred.
Question 6. How long should the antiseptic be allowed to dry before
venipuncture?
A. 1–2 seconds
B. 30–60 seconds
C. 5 minutes
D. It does not need to dry
Answer: B. 30–60 seconds
Rationale: The antiseptic should be allowed to air dry completely (typically 30–60
seconds) before venipuncture. This ensures maximum antimicrobial effect and
prevents hemolysis and patient discomfort.
Question 7. Which vein is most commonly used for venipuncture?
A. Median cubital vein
B. Basilic vein
C. Cephalic vein
D. Dorsal hand veins
Answer: A. Median cubital vein
Rationale: The median cubital vein is the most commonly used vein for
venipuncture. It is large, well-anchored, and easily accessible with less risk of
nerve injury.
Question 8. Which vein should be avoided for venipuncture due to the risk of
nerve injury?
A. Median cubital vein
B. Cephalic vein
C. Basilic vein
D. Median antebrachial vein
, Answer: C. Basilic vein
Rationale: The basilic vein should be avoided because of its proximity to the
median nerve and brachial artery. Accidental puncture can cause nerve damage or
arterial injury.
Question 9. What is the correct angle for needle insertion during routine
venipuncture?
A. 5–10 degrees
B. 15–30 degrees
C. 45–60 degrees
D. 90 degrees
Answer: B. 15–30 degrees
Rationale: The correct angle for venipuncture is 15–30 degrees. This allows the
needle to enter the vein smoothly and minimizes the risk of going through the vein.
Question 10. Which anticoagulant tube is used for hematology testing?
A. EDTA (lavender top)
B. Sodium citrate (light blue top)
C. Heparin (green top)
D. No additive (red top)
Answer: A. EDTA (lavender top)
Rationale: EDTA (lavender top) is the preferred anticoagulant for hematology
testing because it preserves cell morphology. It is used for CBC, hemoglobin,
hematocrit, and platelet counts.
Question 11. Which anticoagulant tube is used for coagulation testing?
A. EDTA (lavender top)
B. Sodium citrate (light blue top)
C. Heparin (green top)
D. No additive (red top)
Assistant Certification Practice Questions
Answer Explanations Specimen Collection
Processing Patient Safety Laboratory Procedures
Exam Preparation
SECTION 1: SPECIMEN COLLECTION FUNDAMENTALS (Questions 1–
25)
Question 1. What is the primary purpose of proper patient identification before
specimen collection?
A. To increase billing revenue
B. To prevent misidentification errors and ensure patient safety
C. To reduce staffing
D. To speed up testing
Answer: B. To prevent misidentification errors and ensure patient safety
Rationale: Proper patient identification is the most critical step in specimen
collection. Using at least two unique patient identifiers (e.g., full name and date of
birth) prevents misidentification errors that can lead to incorrect diagnosis and
treatment.
Question 2. Which two patient identifiers are acceptable for specimen collection
according to The Joint Commission?
A. Room number and bed number
B. Full name and date of birth
C. Patient's physical appearance and room number
D. Diagnosis and physician name
Answer: B. Full name and date of birth
,Rationale: The Joint Commission requires at least two unique patient identifiers.
Acceptable identifiers include full name, date of birth, medical record number, or
other unique identifiers. Room and bed numbers are not acceptable.
Question 3. When should a phlebotomist verify a patient's identification?
A. Only before the first draw of the day
B. Before, during, and after specimen collection
C. Only when the patient is asleep
D. Never
Answer: B. Before, during, and after specimen collection
Rationale: Patient identification should be verified at multiple points: before
collection, during collection, and after collection (when labeling specimens). This
ensures the correct specimen is collected and labeled.
Question 4. What is the correct order for verifying patient identification?
A. Ask the patient to state their name, then check the armband
B. Check the armband, then ask the patient to state their name
C. Ask the nurse for the patient's name
D. Check the room number only
Answer: A. Ask the patient to state their name, then check the armband
Rationale: The correct sequence is to ask the patient to state their full name (not
just yes or no), then verify against the armband or requisition. This active
verification reduces errors.
Question 5. What is the recommended antiseptic for routine blood collection?
A. Hydrogen peroxide
B. 70% isopropyl alcohol
C. Bleach
D. Soap and water
Answer: B. 70% isopropyl alcohol
,Rationale: 70% isopropyl alcohol is the standard antiseptic for routine blood
collection. It effectively reduces skin flora and is fast-acting. For blood cultures,
chlorhexidine or iodine may be preferred.
Question 6. How long should the antiseptic be allowed to dry before
venipuncture?
A. 1–2 seconds
B. 30–60 seconds
C. 5 minutes
D. It does not need to dry
Answer: B. 30–60 seconds
Rationale: The antiseptic should be allowed to air dry completely (typically 30–60
seconds) before venipuncture. This ensures maximum antimicrobial effect and
prevents hemolysis and patient discomfort.
Question 7. Which vein is most commonly used for venipuncture?
A. Median cubital vein
B. Basilic vein
C. Cephalic vein
D. Dorsal hand veins
Answer: A. Median cubital vein
Rationale: The median cubital vein is the most commonly used vein for
venipuncture. It is large, well-anchored, and easily accessible with less risk of
nerve injury.
Question 8. Which vein should be avoided for venipuncture due to the risk of
nerve injury?
A. Median cubital vein
B. Cephalic vein
C. Basilic vein
D. Median antebrachial vein
, Answer: C. Basilic vein
Rationale: The basilic vein should be avoided because of its proximity to the
median nerve and brachial artery. Accidental puncture can cause nerve damage or
arterial injury.
Question 9. What is the correct angle for needle insertion during routine
venipuncture?
A. 5–10 degrees
B. 15–30 degrees
C. 45–60 degrees
D. 90 degrees
Answer: B. 15–30 degrees
Rationale: The correct angle for venipuncture is 15–30 degrees. This allows the
needle to enter the vein smoothly and minimizes the risk of going through the vein.
Question 10. Which anticoagulant tube is used for hematology testing?
A. EDTA (lavender top)
B. Sodium citrate (light blue top)
C. Heparin (green top)
D. No additive (red top)
Answer: A. EDTA (lavender top)
Rationale: EDTA (lavender top) is the preferred anticoagulant for hematology
testing because it preserves cell morphology. It is used for CBC, hemoglobin,
hematocrit, and platelet counts.
Question 11. Which anticoagulant tube is used for coagulation testing?
A. EDTA (lavender top)
B. Sodium citrate (light blue top)
C. Heparin (green top)
D. No additive (red top)
