TheoryFree NHA CPT Practice Test
Take a free NHA CPT practice test for 2026 with questions, answers, explanations, PDF download and timed mock exam links.
NHA CPT Questions
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Q1Hematology tests are most often performed on which of the following?
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✓ Correct answer: whole blood
Hematology tests are most often performed on whole blood, which is blood that has not coagulated. To prevent the blood from clotting after it is collected from the patient, the blood is drawn into a tube containing and anticoagulant.
Q2Which of the following terms refers to the front surface of the body?
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✓ Correct answer: ventral
Ventral and anterior refer to the front surface of the body. Routine venipuncture is performed on the ventral surface of the forearm.
Q3A blood specimen that is to undergo DNA testing should be placed in a vacutainer tube with which color stopper?
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✓ Correct answer: Yellow.
The stopper color of a vacutainer tube tells you which additives are in the tube and thus which tests may be performed on a a specimen in that tube. A specimen which is to undergo DNA testing should be placed in a tube with a yellow stopper.
Q4Any material placed in a tube that maintains or facilitates the integrity and function of the sample is known as which of the following?
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✓ Correct answer: additive
Various additives are added to tubes to improve the quality of the sample. These additives are not anticoagulants or preservatives but are used to improve sample quality or to accelerate sample processing.
Q5Justin successfully completed his first draw. The order was for a PT and PTT. Justin had the right patient, the right test, the right tube, and the right time. He collected the sample in a light blue top tube- he filled the tube to the middle and gently rotated the tube 5-10 times, to mix the sample with the additive. What (if anything) did Justin do wrong?
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✓ Correct answer: Justin did not fill the tube completely.
Justin forgot that a sample collected in a light blue top tube must completely fill the tube. Light blue top tubes contain the additive sodium citrate, in either 3.2% or 3.8% solution (determined by laboratory policy); since the mixing ratio is nine parts blood to one part citrate, most clinical laboratories will reject light blue top tubes that are not completely filled.
Q6Which of the following needle gauges is appropriate when collecting donor blood?
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✓ Correct answer: 16-18 gauge.
Choosing the correct gauge of needle for the work you are doing is vital. For collecting donor units of blood, choose a 16-18 gauge needle. For adult patients undergoing venipuncture for lab tests, a 21-22 gauge needle is used.
Q7What does the word-part "hemat/o" mean?
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✓ Correct answer: Blood
When using the word part "hemat/o", people are talking about blood.
Q8You are drawing a sample which will undergo Monospot testing for mononucleosis. What color should the top of the tube be?
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✓ Correct answer: Red.
The color of the top of a collection tube indicates the types of tests a specimen may undergo. Red-topped tubes are used for specimens that will undergo serology tests on serum, including the Monospot. These tubes are also used for specimens that will undergo chemistry tests on serum.
Q9The circulatory system delivers what to the cells in the body?
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✓ Correct answer: Both food and oxygen.
The circulatory system delivers food, oxygen, and important substances to cells in all areas of the human body. The circulatory systems also removes waste products from the body. It is known as the cardiovascular system. The cardiovascular system is composed of the heart, blood vessels, and blood.
Q10A blood specimen which will undergo a complete blood count should be placed in a vacutainer tube with which color stopper?
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✓ Correct answer: Purple.
The stopper color of a vacutainer tube tells you which additives are in the tube and thus which tests may be performed on a a specimen in that tube. A purple (or lavender) lid indicates a specimen which will undergo a CBC, or complete blood count.
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