Spring Semester 2026 Phlebotomy Technician Certification Practice
Questions and Answers | Complete Certified Phlebotomy Technician (CPT)
Study Guide with Verified Questions, Detailed Rationales, Venipuncture
Techniques, Capillary Collection, Order of Draw, Specimen Handling,
Infection Control, Patient Safety, Lab Procedures & Phlebotomy Exam
Prep
Question 1: What does the acronym OSHA stand for? A. Occupational Safety and
Health Administration B. Office of Safety and Health Administration C. Occupational
Standards and Health Agency D. Office of Standards and Health Agency CORRECT
ANSWER: A. Occupational Safety and Health Administration Rationale: OSHA is the
federal agency responsible for ensuring safe and healthful working conditions by setting
and enforcing standards.
Question 2: Which federal law protects the privacy of patient health information? A.
OSHA B. HIPAA C. FDA D. CDC CORRECT ANSWER: B. HIPAA Rationale: The Health
Insurance Portability and Accountability Act (HIPAA) establishes national standards to
protect sensitive patient health information from being disclosed without consent.
Question 3: According to the CLSI order of draw, which tube is collected first during
a venipuncture? A. Light blue top B. Blood culture bottles C. Lavender top D. Green top
CORRECT ANSWER: B. Blood culture bottles Rationale: Blood culture bottles are
drawn first to prevent contamination from additives or tissue fluid present in other tubes
or on the needle.
Question 4: Which tube is collected second in the standard order of draw? A. Red
top B. Light blue top C. SST (Gold top) D. Lavender top CORRECT ANSWER: B. Light
blue top Rationale: The light blue top, containing sodium citrate, is collected second
for coagulation studies to ensure accurate clotting times.
Question 5: What additive is contained in a light blue top tube? A. EDTA B. Heparin C.
Sodium citrate D. Potassium oxalate CORRECT ANSWER: C. Sodium citrate
Rationale: Sodium citrate prevents clotting by binding calcium, making it the required
additive for coagulation tests like PT and PTT.
Question 6: Which tube is used for a Complete Blood Count (CBC)? A. Green top B.
Lavender top C. Gray top D. Light blue top CORRECT ANSWER: B. Lavender top
Rationale: The lavender top contains EDTA, which preserves cell morphology, making it
the standard tube for hematology tests like CBC.
Question 7: What is the primary vein of choice for routine venipuncture? A. Cephalic
vein B. Basilic vein C. Median cubital vein D. Jugular vein CORRECT ANSWER: C.
Median cubital vein Rationale: The median cubital vein is superficial, well-anchored,
and generally the least painful, making it the primary choice for venipuncture.
Question 8: Which artery is most commonly used for arterial blood gas (ABG)
collections? A. Brachial artery B. Femoral artery C. Radial artery D. Carotid artery
,CORRECT ANSWER: C. Radial artery Rationale: The radial artery is easily accessible,
has collateral circulation (verified by the Allen test), and is less prone to complications.
Question 9: What is the purpose of the Allen test? A. To check for deep vein
thrombosis B. To assess collateral circulation in the hand C. To determine the patient's
blood type D. To measure capillary refill time CORRECT ANSWER: B. To assess
collateral circulation in the hand Rationale: The Allen test ensures adequate
collateral circulation via the ulnar artery before puncturing the radial artery, preventing
ischemia.
Question 10: How long should a tourniquet be left on a patient's arm during
venipuncture? A. No longer than 1 minute B. 3 to 5 minutes C. 10 minutes D. Until the
vein is completely engorged CORRECT ANSWER: A. No longer than 1 minute
Rationale: Leaving a tourniquet on for more than 1 minute can cause
hemoconcentration, altering test results and potentially causing petechiae.
Question 11: At what angle should a standard venipuncture needle be inserted? A.
5 to 10 degrees B. 15 to 30 degrees C. 45 to 60 degrees D. 90 degrees CORRECT
ANSWER: B. 15 to 30 degrees Rationale: A 15 to 30-degree angle allows the needle to
enter the vein smoothly without passing completely through the posterior wall.
Question 12: What angle is typically used for a butterfly needle insertion? A. 5 to 15
degrees B. 30 to 45 degrees C. 60 to 75 degrees D. 90 degrees CORRECT ANSWER: A. 5
to 15 degrees Rationale: Butterfly needles are used for superficial or fragile veins,
requiring a shallower insertion angle of 5 to 15 degrees.
Question 13: Which antiseptic is preferred for preparing the site for a blood culture
collection? A. 70% isopropyl alcohol B. Chlorhexidine gluconate C. Hydrogen peroxide
D. Saline solution CORRECT ANSWER: B. Chlorhexidine gluconate Rationale:
Chlorhexidine is highly effective at eliminating skin flora and is the standard antiseptic
for blood cultures to prevent false-positive contamination.
Question 14: What is the standard antiseptic for routine venipuncture? A. 70%
isopropyl alcohol B. Iodine solution C. Chlorhexidine D. Betadine CORRECT ANSWER:
A. 70% isopropyl alcohol Rationale: 70% isopropyl alcohol is sufficient for routine
venipuncture to disinfect the skin and prevent surface bacteria from entering the
sample.
Question 15: Which way should the needle bevel face during insertion? A. Facing
down B. Facing up C. Facing sideways D. It does not matter CORRECT ANSWER: B.
Facing up Rationale: The bevel should face up to allow the needle to glide smoothly
through the skin and into the vein with minimal tissue trauma.
Question 16: What complication is characterized by a swollen, bruised area at the
puncture site? A. Phlebitis B. Hematoma C. Syncope D. Petechiae CORRECT
ANSWER: B. Hematoma Rationale: A hematoma occurs when blood leaks into the
surrounding tissues, often caused by the needle passing through the vein or removing
the tourniquet too late.
, Question 17: What is the immediate action if a patient begins to feel faint (syncope)
during a draw? A. Continue the draw quickly B. Remove the tourniquet and withdraw
the needle immediately C. Slap the patient's face D. Elevate the patient's legs
CORRECT ANSWER: B. Remove the tourniquet and withdraw the needle
immediately Rationale: Safety is paramount; removing the tourniquet and needle
prevents injury from a sudden collapse while the needle is still in the arm.
Question 18: Which vein poses the highest risk of hitting the brachial artery or
median nerve? A. Cephalic vein B. Median cubital vein C. Basilic vein D. Median
antebrachial vein CORRECT ANSWER: C. Basilic vein Rationale: The basilic vein lies in
close proximity to the brachial artery and median nerve, making it a riskier choice for
venipuncture.
Question 19: What causes hemoconcentration in a blood sample? A. Shaking the
tube vigorously B. Leaving the tourniquet on for too long C. Using a needle that is too
large D. Drawing blood from a patient who is fasting CORRECT ANSWER: B. Leaving
the tourniquet on for too long Rationale: Prolonged tourniquet application allows fluid
to leak into tissues, concentrating the cellular components and larger molecules in the
blood.
Question 20: Which tube is used for Prothrombin Time (PT) and INR tests? A.
Lavender top B. Light blue top C. Green top D. Gray top CORRECT ANSWER: B. Light
blue top Rationale: The light blue top contains sodium citrate, which is required for
coagulation studies like PT and INR to evaluate the extrinsic pathway.
Question 21: Which tube is used for Basic Metabolic Panel (BMP) or
Comprehensive Metabolic Panel (CMP)? A. Lavender top B. Light blue top C. SST
(Gold top) D. Gray top CORRECT ANSWER: C. SST (Gold top) Rationale: The Serum
Separator Tube (SST) contains a clot activator and gel, yielding serum for chemistry
panels like BMP and CMP.
Question 22: Which tube contains sodium heparin or lithium heparin? A. Green top
B. Lavender top C. Light blue top D. Gray top CORRECT ANSWER: A. Green top
Rationale: Green top tubes contain heparin, an anticoagulant that inhibits thrombin,
yielding plasma for chemistry tests.
Question 23: Which tube is used for glucose testing? A. Gray top B. Lavender top C.
Green top D. Red top CORRECT ANSWER: A. Gray top Rationale: The gray top contains
sodium fluoride, which inhibits glycolysis, preserving glucose levels in the sample for
accurate testing.
Question 24: What does the additive in a gray top tube do? A. Binds calcium B.
Inhibits glycolysis C. Activates clotting D. Preserves red blood cells CORRECT
ANSWER: B. Inhibits glycolysis Rationale: Sodium fluoride in the gray top stops red
blood cells from consuming glucose, ensuring accurate blood sugar measurements.
Question 25: What is the proper way to mix an evacuated tube after collection? A.
Shake vigorously for 1 minute B. Invert gently 5 to 10 times C. Roll it between your palms
Questions and Answers | Complete Certified Phlebotomy Technician (CPT)
Study Guide with Verified Questions, Detailed Rationales, Venipuncture
Techniques, Capillary Collection, Order of Draw, Specimen Handling,
Infection Control, Patient Safety, Lab Procedures & Phlebotomy Exam
Prep
Question 1: What does the acronym OSHA stand for? A. Occupational Safety and
Health Administration B. Office of Safety and Health Administration C. Occupational
Standards and Health Agency D. Office of Standards and Health Agency CORRECT
ANSWER: A. Occupational Safety and Health Administration Rationale: OSHA is the
federal agency responsible for ensuring safe and healthful working conditions by setting
and enforcing standards.
Question 2: Which federal law protects the privacy of patient health information? A.
OSHA B. HIPAA C. FDA D. CDC CORRECT ANSWER: B. HIPAA Rationale: The Health
Insurance Portability and Accountability Act (HIPAA) establishes national standards to
protect sensitive patient health information from being disclosed without consent.
Question 3: According to the CLSI order of draw, which tube is collected first during
a venipuncture? A. Light blue top B. Blood culture bottles C. Lavender top D. Green top
CORRECT ANSWER: B. Blood culture bottles Rationale: Blood culture bottles are
drawn first to prevent contamination from additives or tissue fluid present in other tubes
or on the needle.
Question 4: Which tube is collected second in the standard order of draw? A. Red
top B. Light blue top C. SST (Gold top) D. Lavender top CORRECT ANSWER: B. Light
blue top Rationale: The light blue top, containing sodium citrate, is collected second
for coagulation studies to ensure accurate clotting times.
Question 5: What additive is contained in a light blue top tube? A. EDTA B. Heparin C.
Sodium citrate D. Potassium oxalate CORRECT ANSWER: C. Sodium citrate
Rationale: Sodium citrate prevents clotting by binding calcium, making it the required
additive for coagulation tests like PT and PTT.
Question 6: Which tube is used for a Complete Blood Count (CBC)? A. Green top B.
Lavender top C. Gray top D. Light blue top CORRECT ANSWER: B. Lavender top
Rationale: The lavender top contains EDTA, which preserves cell morphology, making it
the standard tube for hematology tests like CBC.
Question 7: What is the primary vein of choice for routine venipuncture? A. Cephalic
vein B. Basilic vein C. Median cubital vein D. Jugular vein CORRECT ANSWER: C.
Median cubital vein Rationale: The median cubital vein is superficial, well-anchored,
and generally the least painful, making it the primary choice for venipuncture.
Question 8: Which artery is most commonly used for arterial blood gas (ABG)
collections? A. Brachial artery B. Femoral artery C. Radial artery D. Carotid artery
,CORRECT ANSWER: C. Radial artery Rationale: The radial artery is easily accessible,
has collateral circulation (verified by the Allen test), and is less prone to complications.
Question 9: What is the purpose of the Allen test? A. To check for deep vein
thrombosis B. To assess collateral circulation in the hand C. To determine the patient's
blood type D. To measure capillary refill time CORRECT ANSWER: B. To assess
collateral circulation in the hand Rationale: The Allen test ensures adequate
collateral circulation via the ulnar artery before puncturing the radial artery, preventing
ischemia.
Question 10: How long should a tourniquet be left on a patient's arm during
venipuncture? A. No longer than 1 minute B. 3 to 5 minutes C. 10 minutes D. Until the
vein is completely engorged CORRECT ANSWER: A. No longer than 1 minute
Rationale: Leaving a tourniquet on for more than 1 minute can cause
hemoconcentration, altering test results and potentially causing petechiae.
Question 11: At what angle should a standard venipuncture needle be inserted? A.
5 to 10 degrees B. 15 to 30 degrees C. 45 to 60 degrees D. 90 degrees CORRECT
ANSWER: B. 15 to 30 degrees Rationale: A 15 to 30-degree angle allows the needle to
enter the vein smoothly without passing completely through the posterior wall.
Question 12: What angle is typically used for a butterfly needle insertion? A. 5 to 15
degrees B. 30 to 45 degrees C. 60 to 75 degrees D. 90 degrees CORRECT ANSWER: A. 5
to 15 degrees Rationale: Butterfly needles are used for superficial or fragile veins,
requiring a shallower insertion angle of 5 to 15 degrees.
Question 13: Which antiseptic is preferred for preparing the site for a blood culture
collection? A. 70% isopropyl alcohol B. Chlorhexidine gluconate C. Hydrogen peroxide
D. Saline solution CORRECT ANSWER: B. Chlorhexidine gluconate Rationale:
Chlorhexidine is highly effective at eliminating skin flora and is the standard antiseptic
for blood cultures to prevent false-positive contamination.
Question 14: What is the standard antiseptic for routine venipuncture? A. 70%
isopropyl alcohol B. Iodine solution C. Chlorhexidine D. Betadine CORRECT ANSWER:
A. 70% isopropyl alcohol Rationale: 70% isopropyl alcohol is sufficient for routine
venipuncture to disinfect the skin and prevent surface bacteria from entering the
sample.
Question 15: Which way should the needle bevel face during insertion? A. Facing
down B. Facing up C. Facing sideways D. It does not matter CORRECT ANSWER: B.
Facing up Rationale: The bevel should face up to allow the needle to glide smoothly
through the skin and into the vein with minimal tissue trauma.
Question 16: What complication is characterized by a swollen, bruised area at the
puncture site? A. Phlebitis B. Hematoma C. Syncope D. Petechiae CORRECT
ANSWER: B. Hematoma Rationale: A hematoma occurs when blood leaks into the
surrounding tissues, often caused by the needle passing through the vein or removing
the tourniquet too late.
, Question 17: What is the immediate action if a patient begins to feel faint (syncope)
during a draw? A. Continue the draw quickly B. Remove the tourniquet and withdraw
the needle immediately C. Slap the patient's face D. Elevate the patient's legs
CORRECT ANSWER: B. Remove the tourniquet and withdraw the needle
immediately Rationale: Safety is paramount; removing the tourniquet and needle
prevents injury from a sudden collapse while the needle is still in the arm.
Question 18: Which vein poses the highest risk of hitting the brachial artery or
median nerve? A. Cephalic vein B. Median cubital vein C. Basilic vein D. Median
antebrachial vein CORRECT ANSWER: C. Basilic vein Rationale: The basilic vein lies in
close proximity to the brachial artery and median nerve, making it a riskier choice for
venipuncture.
Question 19: What causes hemoconcentration in a blood sample? A. Shaking the
tube vigorously B. Leaving the tourniquet on for too long C. Using a needle that is too
large D. Drawing blood from a patient who is fasting CORRECT ANSWER: B. Leaving
the tourniquet on for too long Rationale: Prolonged tourniquet application allows fluid
to leak into tissues, concentrating the cellular components and larger molecules in the
blood.
Question 20: Which tube is used for Prothrombin Time (PT) and INR tests? A.
Lavender top B. Light blue top C. Green top D. Gray top CORRECT ANSWER: B. Light
blue top Rationale: The light blue top contains sodium citrate, which is required for
coagulation studies like PT and INR to evaluate the extrinsic pathway.
Question 21: Which tube is used for Basic Metabolic Panel (BMP) or
Comprehensive Metabolic Panel (CMP)? A. Lavender top B. Light blue top C. SST
(Gold top) D. Gray top CORRECT ANSWER: C. SST (Gold top) Rationale: The Serum
Separator Tube (SST) contains a clot activator and gel, yielding serum for chemistry
panels like BMP and CMP.
Question 22: Which tube contains sodium heparin or lithium heparin? A. Green top
B. Lavender top C. Light blue top D. Gray top CORRECT ANSWER: A. Green top
Rationale: Green top tubes contain heparin, an anticoagulant that inhibits thrombin,
yielding plasma for chemistry tests.
Question 23: Which tube is used for glucose testing? A. Gray top B. Lavender top C.
Green top D. Red top CORRECT ANSWER: A. Gray top Rationale: The gray top contains
sodium fluoride, which inhibits glycolysis, preserving glucose levels in the sample for
accurate testing.
Question 24: What does the additive in a gray top tube do? A. Binds calcium B.
Inhibits glycolysis C. Activates clotting D. Preserves red blood cells CORRECT
ANSWER: B. Inhibits glycolysis Rationale: Sodium fluoride in the gray top stops red
blood cells from consuming glucose, ensuring accurate blood sugar measurements.
Question 25: What is the proper way to mix an evacuated tube after collection? A.
Shake vigorously for 1 minute B. Invert gently 5 to 10 times C. Roll it between your palms
