PCT NHA EXAM questions and
answers (Latest )
(verified answers)
1. The lavender-topped tube contains:
Choices:
A. No additive
B. SPS
C. Na⁺ citrate
D. EDTA
CORRECT ANSWER: D. EDTA
Explanation: Lavender-top tubes contain EDTA, an
anticoagulant that binds calcium and prevents clotting. They are
commonly used for hematology testing such as a complete blood
count (CBC).
,2. The additive in a gray-topped tube is:
Choices:
A. K⁺ oxalate
B. Na⁺ citrate
C. EDTA
D. None of the above
CORRECT ANSWER: A. K⁺ oxalate
Explanation: Gray-top tubes commonly contain potassium
oxalate as an anticoagulant, often combined with sodium fluoride
to inhibit glycolysis and preserve glucose levels.
3. Which of the needles has the largest gauge?
Choices:
A. 16-g
B. 20-g
C. 21-g
D. 25-g
CORRECT ANSWER: A. 16-g
,Explanation: Needle gauge is inversely related to diameter.
Therefore, a 16-gauge needle has a larger internal diameter than
20-, 21-, or 25-gauge needles.
4. The venipuncture equipment that consists of a needle
attached to a plastic tubing is known as:
Choices:
A. Syringe
B. Evacuated-tube
C. Winged infusion set
D. Micro-collection container
CORRECT ANSWER: C. Winged infusion set
Explanation: A winged infusion set, commonly called a butterfly
needle, consists of a needle connected to flexible tubing. It is
useful when venipuncture requires greater control or when
accessing small or fragile veins.
5. Which gauge needle is used for typical adult venipuncture?
, Choices:
A. 23-g
B. 16-g
C. 21-g
D. 25-g
CORRECT ANSWER: C. 21-g
Explanation: A 21-gauge needle is commonly used for routine
adult venipuncture because it provides adequate blood flow while
minimizing unnecessary tissue trauma.
6. All of the following are true about winged infusion sets
EXCEPT:
Choices:
A. Commonly referred to as a butterfly
B. Comes in needle sizes of 16g and 18g
C. Used on fragile veins
D. Preferred over a syringe
CORRECT ANSWER: B. Comes in needle sizes of 16g and 18g
answers (Latest )
(verified answers)
1. The lavender-topped tube contains:
Choices:
A. No additive
B. SPS
C. Na⁺ citrate
D. EDTA
CORRECT ANSWER: D. EDTA
Explanation: Lavender-top tubes contain EDTA, an
anticoagulant that binds calcium and prevents clotting. They are
commonly used for hematology testing such as a complete blood
count (CBC).
,2. The additive in a gray-topped tube is:
Choices:
A. K⁺ oxalate
B. Na⁺ citrate
C. EDTA
D. None of the above
CORRECT ANSWER: A. K⁺ oxalate
Explanation: Gray-top tubes commonly contain potassium
oxalate as an anticoagulant, often combined with sodium fluoride
to inhibit glycolysis and preserve glucose levels.
3. Which of the needles has the largest gauge?
Choices:
A. 16-g
B. 20-g
C. 21-g
D. 25-g
CORRECT ANSWER: A. 16-g
,Explanation: Needle gauge is inversely related to diameter.
Therefore, a 16-gauge needle has a larger internal diameter than
20-, 21-, or 25-gauge needles.
4. The venipuncture equipment that consists of a needle
attached to a plastic tubing is known as:
Choices:
A. Syringe
B. Evacuated-tube
C. Winged infusion set
D. Micro-collection container
CORRECT ANSWER: C. Winged infusion set
Explanation: A winged infusion set, commonly called a butterfly
needle, consists of a needle connected to flexible tubing. It is
useful when venipuncture requires greater control or when
accessing small or fragile veins.
5. Which gauge needle is used for typical adult venipuncture?
, Choices:
A. 23-g
B. 16-g
C. 21-g
D. 25-g
CORRECT ANSWER: C. 21-g
Explanation: A 21-gauge needle is commonly used for routine
adult venipuncture because it provides adequate blood flow while
minimizing unnecessary tissue trauma.
6. All of the following are true about winged infusion sets
EXCEPT:
Choices:
A. Commonly referred to as a butterfly
B. Comes in needle sizes of 16g and 18g
C. Used on fragile veins
D. Preferred over a syringe
CORRECT ANSWER: B. Comes in needle sizes of 16g and 18g
