NWCA EXAM QUESTIONS AND
ANSWERS WITH 100% COMPLETE
SOLUTIONS
Which laboratory test result is affected most if the patient is NOT fasting? - CORRECT ANSWER-
Triglycerides
Hemolysis in collected blood can cause a falsely decreased value for - CORRECT ANSWER- Hemoglobin
After the needle is inserted for a venipuncture and the blood begins to squirt out in pulses, this might
indicate that - CORRECT ANSWER- An artery has been penetrated by the needle
If a patient is obese, what special equipment, if any, would be helpful in the specimen collection
process? - CORRECT ANSWER- A large blood pressure cuff
When a patient has "difficult" veins, what strategies, if any, can be used to improve the likelihood of a
success puncture? - CORRECT ANSWER- All of the above
During the venipuncture procedure, what should the phlebotomist do after the needle is inserted and
blood begins to flow? - CORRECT ANSWER- Release the tourniquet about half-way through the
procedure
Steps in the identification process for a phlebotomy procedure for a patient should include - CORRECT
ANSWER- A 3- way match with verbal, ID bracelet, and requisition information
Approximately how many minutes does it take for a specimen without additives to clot? - CORRECT
ANSWER- 30
Yellow top tubes are used to collect blood for - CORRECT ANSWER- Blood cultures
, What is the vacuum blood collection tube of choice for CBC blood collection? - CORRECT ANSWER-
Purple top tube
What is the antiocoagulant of choice for coagulation blood studies? - CORRECT ANSWER- Sodium citrate
A solid mass derived from blood constituents that occludes a blood vessel is a - CORRECT ANSWER-
Thrombus
When blood is to be collected for a glucose tolerance test, the patient should fast for - CORRECT
ANSWER- 8-12 hours
An abnormal accumulation of fluid in the intercellular spaces of the body that is localized or diffused is
referred to as - CORRECT ANSWER- Edema
Blood cultures can be collected directly into culture media and doing so will - CORRECT ANSWER-
Minimize chances of contamination and speed contact with culture media
What is designed to reduce the risk of transmission for microorganisms from both recognized and
unrecognized sources of infection in health care facilities - CORRECT ANSWER- Standard or universal
precautions
"CSF" is a specimen originating from - CORRECT ANSWER- The spinal column
What is a commonly used intravenous device that is sometimes used in the collection of blood from
patients who are difficult to collect by conventional methods - CORRECT ANSWER- Butterfly needle or
wingedbinfusion set
the color coding for needles indicates the - CORRECT ANSWER- gauge size
Which anticoagulant is found in a green top blood collection tube - CORRECT ANSWER- Sodium Heparin
What is an anticoagulant used in blood donations? - CORRECT ANSWER- citrate phosphate dextrose
ANSWERS WITH 100% COMPLETE
SOLUTIONS
Which laboratory test result is affected most if the patient is NOT fasting? - CORRECT ANSWER-
Triglycerides
Hemolysis in collected blood can cause a falsely decreased value for - CORRECT ANSWER- Hemoglobin
After the needle is inserted for a venipuncture and the blood begins to squirt out in pulses, this might
indicate that - CORRECT ANSWER- An artery has been penetrated by the needle
If a patient is obese, what special equipment, if any, would be helpful in the specimen collection
process? - CORRECT ANSWER- A large blood pressure cuff
When a patient has "difficult" veins, what strategies, if any, can be used to improve the likelihood of a
success puncture? - CORRECT ANSWER- All of the above
During the venipuncture procedure, what should the phlebotomist do after the needle is inserted and
blood begins to flow? - CORRECT ANSWER- Release the tourniquet about half-way through the
procedure
Steps in the identification process for a phlebotomy procedure for a patient should include - CORRECT
ANSWER- A 3- way match with verbal, ID bracelet, and requisition information
Approximately how many minutes does it take for a specimen without additives to clot? - CORRECT
ANSWER- 30
Yellow top tubes are used to collect blood for - CORRECT ANSWER- Blood cultures
, What is the vacuum blood collection tube of choice for CBC blood collection? - CORRECT ANSWER-
Purple top tube
What is the antiocoagulant of choice for coagulation blood studies? - CORRECT ANSWER- Sodium citrate
A solid mass derived from blood constituents that occludes a blood vessel is a - CORRECT ANSWER-
Thrombus
When blood is to be collected for a glucose tolerance test, the patient should fast for - CORRECT
ANSWER- 8-12 hours
An abnormal accumulation of fluid in the intercellular spaces of the body that is localized or diffused is
referred to as - CORRECT ANSWER- Edema
Blood cultures can be collected directly into culture media and doing so will - CORRECT ANSWER-
Minimize chances of contamination and speed contact with culture media
What is designed to reduce the risk of transmission for microorganisms from both recognized and
unrecognized sources of infection in health care facilities - CORRECT ANSWER- Standard or universal
precautions
"CSF" is a specimen originating from - CORRECT ANSWER- The spinal column
What is a commonly used intravenous device that is sometimes used in the collection of blood from
patients who are difficult to collect by conventional methods - CORRECT ANSWER- Butterfly needle or
wingedbinfusion set
the color coding for needles indicates the - CORRECT ANSWER- gauge size
Which anticoagulant is found in a green top blood collection tube - CORRECT ANSWER- Sodium Heparin
What is an anticoagulant used in blood donations? - CORRECT ANSWER- citrate phosphate dextrose
