Castleport Test Prep

Free NHA CPT Practice Test: 50 Questions for 2026

By the Castleport Test Prep Editorial Team · Last verified: August 18, 2026

Take the NHA CPT practice test below. It has 50 original questions divided 13 / 10 / 14 / 6 / 7 across the five current domains—the smallest whole-number set that reproduces NHA's 26 / 20 / 28 / 12 / 14 blueprint without rounding. You get an instant total, domain results, every correct answer, and every explanation. No email. No sign-up.

Free · No email · Instant result

The free Castleport NHA CPT diagnostic

50 original questions, split 13 / 10 / 14 / 6 / 7 — the exact shape of the NHA CPT blueprint that took effect January 7, 2026. You get a score for every one of the five domains and a written explanation for every question before you spend a dollar on prep.

Safety and Compliance · 26%
Patient Preparation · 20%
Routine Collections · 28%
Special Collections · 12%
Processing · 14%
Why 50 and not 25? The official weights are 26 / 20 / 28 / 12 / 14. Their greatest common divisor is 2, so 50 is the smallest whole-number set that can reproduce all five proportions with no rounding: 13 / 10 / 14 / 6 / 7. Shorter sets can still be useful, but their domain mix is an approximation.

These are original Castleport items written to the published test plan. They are not real, recalled, or leaked exam questions. This diagnostic is not an official NHA exam, does not produce an NHA scaled score, and does not predict or guarantee a passing result.

This is a study diagnostic, not an imitation score report. It does not convert your result to NHA's 200–500 scaled score, predict whether you will pass, or claim that a certain raw percentage equals 390. NHA publishes no raw-to-scaled conversion.

These are not real NHA exam questions. Every item is original, written from the current public test plan, and labeled with the task or knowledge-statement locator it tests. Castleport does not use recalled, leaked, or live exam content.

Need the full exam map before you begin? Read the verified NHA CPT exam-prep hub, including the January 7, 2026 blueprint change, eligibility rules, retakes, pass rates, test-day rules, and free study-plan builder.

How does this NHA CPT practice test match the 2026 blueprint?

Answer: It uses NHA's five current domain weights exactly. The live certification exam contains 100 scored items plus 20 unscored pretest items. This practice set contains 50 scored practice items—half of each published domain count.

NHA CPT source table 1
Current NHA CPT domainOfficial scored itemsOfficial weightQuestions here
Safety and Compliance2626%13
Patient Preparation2020%10
Routine Blood Collections2828%14
Special Collections1212%6
Processing1414%7
Total100100%50

The arithmetic is exact because the greatest common divisor of 26, 20, 28, 12, and 14 is 2. Divide each weight by 2 and you get 13, 10, 14, 6, and 7. That makes 50 the shortest whole-number set that can preserve all five proportions without rounding.

That exact split does not make this an official form or validate a passing cutoff. It means one thing: a weak domain cannot disappear because somebody rounded a 20-question quiz badly.

Official source: NHA CPT test plan based on the 2024 job analysis, verified August 18, 2026.

What does your NHA CPT practice-test score mean?

Answer: Your score tells you how you performed on these 50 original questions. The domain breakdown tells you where the misses happened. Neither number converts to NHA's scaled score.

Use the result in this order:

  1. Look at unanswered questions first. The diagnostic counts them as incorrect because unanswered certification-exam items cannot earn credit.
  2. Read every missed explanation. Write the rule you missed in your own words instead of copying the option.
  3. Check guessed-right answers. A correct guess is useful on test day, but it is not stable knowledge yet.
  4. Compare domains, not just percentages. Six Special Collections questions and fourteen Routine Blood Collections questions produce different-sized samples. Use the result to choose what to review next, not to manufacture false precision.
  5. Retake after targeted review. The options reshuffle on a new attempt. Do not memorize letters; explain why the right action is right.

NHA's actual result is a scaled score from 200 to 500, with 390 as the passing standard. NHA also reports content areas as Above, Near, or Below the passing standard, but those categories account for question difficulty and cannot be recreated from a public practice set. The honest output here is the raw count you earned and the domains that produced it.

Official scoring source: NHA Candidate Handbook, revised June 1, 2026.

All 50 NHA CPT practice questions with explanations

These are original Castleport questions written to the current public NHA CPT test plan. They are not real, recalled, leaked, or live exam items. A raw score on this set cannot be converted to NHA's 200–500 scale and does not predict a passing result.

Safety and Compliance: 13 questions (26% exam weight)

Safety and Compliance 1: A used winged collection set is still attached to the tube holder after a draw. Where does the whole assembly go?
  1. Into the sharps container as one unit
  2. In the regular trash after the needle is removed
  3. In the red biohazard bag
  4. Back on the tray until the end of the shift

Answer: A. Into the sharps container as one unit

Why: The needle, holder, and tubing are discarded together, immediately, into the sharps container. Taking the assembly apart to save a holder puts your hand next to a contaminated needle, which is exactly what the Bloodborne Pathogens Standard is written to prevent.

Current NHA CPT test-plan locator: 1G / k30

Safety and Compliance 2: You are putting on personal protective equipment for a patient on contact precautions. What goes on last?
  1. Gloves
  2. Eye protection
  3. Mask
  4. Gown

Answer: A. Gloves

Why: Gown, then mask, then eye protection, then gloves. Gloves go on last so their cuffs cover the gown sleeves. Reverse the thinking for taking it off: the dirtiest item, the gloves, comes off first.

Current NHA CPT test-plan locator: 1J / k36

Safety and Compliance 3: A patient has a documented Clostridioides difficile infection. What do you use for hand hygiene after the draw?
  1. A dry wipe, then alcohol rub
  2. Soap and water
  3. Alcohol-based hand rub only
  4. Alcohol rub, then lotion

Answer: B. Soap and water

Why: Soap and water physically removes C. difficile spores more effectively than alcohol-based hand rub. Use the infection-control method required by the facility; among these choices, soap and water is the correct response.

Current NHA CPT test-plan locator: 1K / k35

Safety and Compliance 4: A needle sticks your finger through your glove. What do you do first?
  1. Find the patient's chart and check their history
  2. Wash the site with soap and water
  3. Squeeze the site to make it bleed
  4. Report it to your supervisor

Answer: B. Wash the site with soap and water

Why: Wash first, then report. Care for the wound comes before paperwork, and reporting still has to happen promptly so post-exposure evaluation can start. Squeezing the site is not recommended, and you do not go looking through a patient's chart yourself.

Current NHA CPT test-plan locator: 1H / k33

Safety and Compliance 5: A patient is on airborne precautions. What does that change for you?
  1. You wear a surgical mask and prop the door open
  2. You draw through the doorway without entering
  3. You wear a fitted respirator and the door stays closed
  4. You wear two pairs of gloves

Answer: C. You wear a fitted respirator and the door stays closed

Why: Airborne precautions call for a fit-tested respirator rather than a surgical mask, and the room door stays closed. Droplet precautions use different respiratory protection; the two categories are not interchangeable.

Current NHA CPT test-plan locator: 1I / k34

Safety and Compliance 6: A sharps container on the phlebotomy cart has reached its marked fill line.
  1. Close and replace it now
  2. Press the contents down to make room
  3. Keep using it until a sharp reaches the opening
  4. Use it only for lancets from here on

Answer: A. Close and replace it now

Why: Close and replace a sharps container when it reaches the manufacturer's fill line. OSHA requires routine replacement before overfilling, and the contents must never be pressed down by hand.

Current NHA CPT test-plan locator: 1G / k30

Safety and Compliance 7: The specimen refrigerator log has a blank space for yesterday. What is the right response?
  1. Leave the blank; one day does not matter
  2. Fill it in with today's reading
  3. Record the missing entry and report the gap per policy
  4. Estimate a reading between the entries on either side

Answer: C. Record the missing entry and report the gap per policy

Why: You document what actually happened and report the gap. Back-filling a log with a number nobody read is falsified quality-control documentation, and it hides a temperature excursion that may have spoiled specimens.

Current NHA CPT test-plan locator: 1E / k28

Safety and Compliance 8: A required control on a CLIA-waived point-of-care analyzer is outside its acceptable range. What do you do next?
  1. Run patient samples and repeat the control later
  2. Stop patient testing and follow the manufacturer and facility troubleshooting procedure
  3. Average the control with yesterday's result
  4. Report only results that look clinically reasonable

Answer: B. Stop patient testing and follow the manufacturer and facility troubleshooting procedure

Why: Do not report patient results from a system whose required quality control is unacceptable. Follow the manufacturer's instructions and the facility's corrective-action procedure before patient testing resumes.

Current NHA CPT test-plan locator: 1F / k29

Safety and Compliance 9: A coworker asks you in a busy hallway which patient in room 4 is being tested for hepatitis.
  1. Refuse and report your coworker
  2. Answer quietly since the hallway is noisy
  3. Answer, because you both work at the facility
  4. Move the conversation somewhere private and only share what their job requires

Answer: D. Move the conversation somewhere private and only share what their job requires

Why: Protected health information moves on a need-to-know basis, in a place where it will not be overheard. Lowering your voice is not the same as protecting privacy, and shared employment is not the same as a treatment relationship.

Current NHA CPT test-plan locator: 1C / k13

Safety and Compliance 10: A patient asks you what her results mean while you are labeling her tubes.
  1. Tell her the values look normal to you
  2. Read her the reference range on the tube label
  3. Tell her the ordering provider will go over the results with her
  4. Tell her you are not allowed to speak to patients

Answer: C. Tell her the ordering provider will go over the results with her

Why: Interpreting results is outside a phlebotomy technician's scope, and guessing can do real harm. Redirecting warmly to the provider is both the correct scope answer and the answer that keeps the patient's trust.

Current NHA CPT test-plan locator: 1D / k26

Safety and Compliance 11: Mid-draw, a seated outpatient goes pale and says the room is spinning. What comes first?
  1. Offer juice and keep drawing
  2. Finish the last tube quickly
  3. Stop the collection, remove the needle safely, and protect the patient from falling
  4. Leave the patient alone while you get help

Answer: C. Stop the collection, remove the needle safely, and protect the patient from falling

Why: Stop the collection, release and remove the needle safely, and protect the patient from a fall while getting help according to facility protocol. The specimen is secondary to immediate patient safety.

Current NHA CPT test-plan locator: 1L / k37

Safety and Compliance 12: After a draw, a patient on an anticoagulant is still bleeding at the site after five minutes of pressure.
  1. Apply a tight bandage and send him on his way
  2. Have him raise the arm and leave the site uncovered
  3. Apply ice directly to the open puncture
  4. Keep holding firm pressure and notify the nurse or provider

Answer: D. Keep holding firm pressure and notify the nurse or provider

Why: Continued direct pressure is the treatment, and prolonged bleeding is a clinical finding somebody needs to know about. A patient should never be released from the drawing area while the site is still bleeding.

Current NHA CPT test-plan locator: 1M / k37

Safety and Compliance 13: You realize you labeled two tubes with the wrong patient's information and already sent them.
  1. Wait to see whether the lab notices
  2. Ask a coworker to relabel them
  3. Correct your own copy of the log and move on
  4. Notify the laboratory immediately and file an incident report

Answer: D. Notify the laboratory immediately and file an incident report

Why: A misidentified specimen can produce a treatment decision for the wrong person, so it is reported at once, in writing. Relabeling after the fact is specimen falsification, not a fix.

Current NHA CPT test-plan locator: 1N / k39

Patient Preparation: 10 questions (20% exam weight)

Patient Preparation 1: An inpatient is asleep and wearing an ID band. How do you identify her?
  1. Ask the nurse to confirm and proceed
  2. Wake her, ask her to state her name and date of birth, and match the band to the requisition
  3. Read the band and proceed without waking her
  4. Match the room number to the requisition

Answer: B. Wake her, ask her to state her name and date of birth, and match the band to the requisition

Why: Two identifiers, both actively confirmed, and both matched to the requisition and the band. Room numbers are never an identifier, and asking a sleeping patient to wake up is a small inconvenience against drawing the wrong person.

Current NHA CPT test-plan locator: 2E / k41

Patient Preparation 2: A requisition arrives with the patient and tests filled in but no priority marked.
  1. Treat it as STAT to be safe
  2. Collect and let the lab decide
  3. Treat it as routine
  4. Clarify the priority with the ordering area before collecting

Answer: D. Clarify the priority with the ordering area before collecting

Why: Priority changes when you draw and how fast the specimen moves. Guessing in either direction has consequences: a missed STAT delays care, and a false STAT pushes real emergencies back in line.

Current NHA CPT test-plan locator: 2C / k42

Patient Preparation 3: As you apply the tourniquet, the patient pulls his arm back and says he has changed his mind.
  1. Explain that the order requires the draw and continue
  2. Ask a coworker to hold the arm steady
  3. Stop and notify the ordering provider or nurse
  4. Draw from the other arm instead

Answer: C. Stop and notify the ordering provider or nurse

Why: Consent can be withdrawn at any point, including after it was given. Stop, document the refusal, and notify the responsible nurse or ordering provider according to facility policy. An order does not cancel the patient's right to refuse.

Current NHA CPT test-plan locator: 2F / k43

Patient Preparation 4: A patient scheduled for a fasting glucose says she had coffee with cream two hours ago.
  1. Collect and say nothing
  2. Send her home without collecting
  3. Collect and write 'fasting' on the tube
  4. Report the break in fasting and follow the facility's protocol

Answer: D. Report the break in fasting and follow the facility's protocol

Why: The result is only interpretable if the lab knows the fasting state. Your job is to report accurately, not to decide whether the test still counts and not to record a fasting status that is not true.

Current NHA CPT test-plan locator: 2K / k46

Patient Preparation 5: An order reads 'vancomycin trough.' When is that specimen collected?
  1. Just before the next scheduled dose
  2. Thirty minutes after the dose finishes
  3. Immediately after the dose is hung
  4. At any convenient point between doses

Answer: A. Just before the next scheduled dose

Why: A trough is the lowest concentration, so it is drawn right before the next dose. A peak is drawn after the dose. Collecting at the wrong point produces a number that looks real and leads to the wrong dose adjustment.

Current NHA CPT test-plan locator: 2C / k45

Patient Preparation 6: A six-year-old is brought for a nonemergency draw by a neighbor who has no documented authority to consent.
  1. Pause and obtain authorization through the facility's approved consent process
  2. Collect and document only the neighbor's name
  3. Collect because any accompanying adult may consent
  4. Rely only on the child's permission

Answer: A. Pause and obtain authorization through the facility's approved consent process

Why: An accompanying adult is not automatically authorized to consent for a child. Pause and follow state law and facility policy to obtain consent from an authorized person; the child's assent can matter, but it does not replace required legal authorization.

Current NHA CPT test-plan locator: 2G / k43

Patient Preparation 7: A patient has a hemodialysis fistula in the left arm and an IV running in the right forearm.
  1. Draw from the fistula arm below the access
  2. Draw above the IV on the right
  3. Use a foot vein without authorization
  4. Ask the nurse or provider which site is approved before drawing

Answer: D. Ask the nurse or provider which site is approved before drawing

Why: Do not use a hemodialysis access arm for routine venipuncture, and a running IV can affect a specimen collected from that limb. When the usual sites are restricted, follow the facility's escalation process and use only a specifically approved site.

Current NHA CPT test-plan locator: 2O / k53

Patient Preparation 8: A patient tells you he has fainted during every previous blood draw.
  1. Have him lie down or recline for the collection
  2. Draw faster than usual
  3. Have him stand so he can sit if he feels faint
  4. Tell him fainting is uncommon and proceed

Answer: A. Have him lie down or recline for the collection

Why: You are told the risk in advance, so you remove the fall. Reclining also makes the draw easier to control if he does go out. Reassurance without a change in position does nothing about the actual hazard.

Current NHA CPT test-plan locator: 2L / k48

Patient Preparation 9: A patient needs to provide a clean-catch midstream urine specimen. What do you tell her?
  1. Clean the area, begin voiding into the toilet, then collect the middle portion
  2. Collect the last portion after the stream slows
  3. Collect the very first portion of the stream
  4. Collect the entire void in the container

Answer: A. Clean the area, begin voiding into the toilet, then collect the middle portion

Why: The first portion flushes out skin and urethral organisms, so the middle portion is the part that represents the bladder. Instructing this clearly is the difference between a usable culture and a contaminated one.

Current NHA CPT test-plan locator: 2P / k50

Patient Preparation 10: Before an outpatient draw, the registration screen shows the insurance on file expired last month. Under the current test plan, what falls within the phlebotomy technician's role?
  1. Verify coverage and follow facility protocol for updating it before the collection
  2. Collect first and let billing sort it out later
  3. Tell the patient the visit will be self-pay
  4. Cancel the order

Answer: A. Verify coverage and follow facility protocol for updating it before the collection

Why: Insurance verification, copay collection, and registration entered the CPT test plan with the blueprint that took effect January 7, 2026. Coverage questions get resolved through the facility's process, not by quoting the patient a price or cancelling a provider's order.

Current NHA CPT test-plan locator: 2H / 2I / k44

Routine Blood Collections: 14 questions (28% exam weight)

Routine Blood Collections 1: One patient needs a blood culture set, a light blue sodium citrate tube, a gold serum separator tube, a green heparin tube, and a lavender EDTA tube. What order do you draw?
  1. Light blue, blood culture, lavender, green, gold
  2. Blood culture, light blue, gold, green, lavender
  3. Lavender, green, gold, light blue, blood culture
  4. Gold, light blue, green, lavender, blood culture

Answer: B. Blood culture, light blue, gold, green, lavender

Why: Sterile first, then the citrate tube, then serum, then heparin, then EDTA, then any glycolytic inhibitor tube. The order exists to stop additive carryover: EDTA drawn early, for example, will falsely raise potassium and lower calcium in the tubes that follow.

Current NHA CPT test-plan locator: 3J / k59

Routine Blood Collections 2: The tourniquet has been on for just over a minute while you look for a vein.
  1. Leave it and draw quickly
  2. Tighten it to raise the vein
  3. Move it higher and leave it on
  4. Release it, allow circulation to recover, and reapply according to procedure

Answer: D. Release it, allow circulation to recover, and reapply according to procedure

Why: Prolonged tourniquet time can cause hemoconcentration and alter results. Release it, allow circulation to recover for the interval required by the collection procedure, and reapply after you have selected a site.

Current NHA CPT test-plan locator: 3E / k60

Routine Blood Collections 3: Which vein is the first choice in the antecubital area of an average adult?
  1. Median cubital
  2. Cephalic
  3. Brachial artery
  4. Basilic

Answer: A. Median cubital

Why: The median cubital is usually large, well anchored, and farther from the brachial artery and major nerves than the basilic area. The basilic is used cautiously when safer veins are unavailable, and the brachial artery is not a venipuncture site.

Current NHA CPT test-plan locator: 3F / k61

Routine Blood Collections 4: At what angle does the needle enter the vein for a routine venipuncture?
  1. About 90 degrees, bevel down
  2. 5 degrees, bevel down
  3. 45 to 60 degrees, bevel up
  4. 15 to 30 degrees, bevel up

Answer: D. 15 to 30 degrees, bevel up

Why: A shallow 15 to 30 degree approach with the bevel up helps the needle enter the vein without passing through the back wall. A steeper approach increases the chance of going through the vein and causing a hematoma.

Current NHA CPT test-plan locator: 3I / k65

Routine Blood Collections 5: Why is the basilic vein avoided when another option exists?
  1. The brachial artery and median nerve sit close to it
  2. It is too small for a standard needle
  3. It sits too deep to palpate
  4. It collapses under vacuum more than other veins

Answer: A. The brachial artery and median nerve sit close to it

Why: The brachial artery and important nerves lie close to the basilic area, so an error there can cause serious harm. That anatomy is why the basilic is used cautiously when safer veins are unavailable.

Current NHA CPT test-plan locator: 3F / k62

Routine Blood Collections 6: You have cleaned a routine venipuncture site with 70 percent isopropyl alcohol. What next?
  1. Fan it and palpate the site again
  2. Let it air dry completely
  3. Insert the needle right away
  4. Wipe it dry with gauze

Answer: B. Let it air dry completely

Why: Let the antiseptic air-dry for its required contact time. Drawing through wet alcohol can sting, while wiping, fanning, or touching the site again can shorten contact time or recontaminate the prepared skin.

Current NHA CPT test-plan locator: 3G / k63

Routine Blood Collections 7: The site swells and the patient reports a burning ache as the first tube fills.
  1. Change to a larger tube
  2. Release the tourniquet, remove the needle, and apply pressure
  3. Advance the needle deeper
  4. Loosen the tourniquet and continue

Answer: B. Release the tourniquet, remove the needle, and apply pressure

Why: Swelling with pain during a draw points to a hematoma forming as blood leaks into tissue. You stop, come out, and hold pressure. Continuing enlarges the hematoma and raises the risk of nerve compression.

Current NHA CPT test-plan locator: 3L / k68

Routine Blood Collections 8: The needle is in and no blood is entering the tube. What is the reasonable first adjustment?
  1. Probe laterally for the vein
  2. Ask the patient to pump his fist repeatedly
  3. Slightly change the needle depth or angle, or try a fresh tube
  4. Take the needle out and go straight to the other arm

Answer: C. Slightly change the needle depth or angle, or try a fresh tube

Why: A small depth or angle correction and a fresh tube are reasonable first checks because the bevel may be against the vein wall or the tube may have lost vacuum. Avoid lateral probing, and do not use vigorous fist pumping because it can alter analytes such as potassium.

Current NHA CPT test-plan locator: 3K / k67

Routine Blood Collections 9: How is a lavender EDTA tube handled right after it is filled?
  1. Set it upright and leave it still
  2. Shake it briskly
  3. Invert it gently several times
  4. Refrigerate it immediately

Answer: C. Invert it gently several times

Why: Gentle inversion mixes the anticoagulant through the sample so it does not clot. Shaking can hemolyze red cells, and failing to mix the tube can leave clots that make the cell count unusable.

Current NHA CPT test-plan locator: 3N / k59

Routine Blood Collections 10: A light blue sodium citrate tube is only about two-thirds full. What is the effect?
  1. The specimen clots faster and results read low
  2. The blood-to-additive ratio is wrong and coagulation results are unreliable
  3. Nothing, as long as there is enough plasma
  4. Only the volume is affected, not the result

Answer: B. The blood-to-additive ratio is wrong and coagulation results are unreliable

Why: Sodium citrate tubes depend on a fixed 9:1 blood-to-anticoagulant ratio. Underfilled, the extra citrate falsely prolongs clotting times, and a falsely prolonged result can change an anticoagulation dose.

Current NHA CPT test-plan locator: 3A / k57

Routine Blood Collections 11: For a capillary collection, what is the correct order of collection?
  1. Blood gas, then EDTA, then other additive tubes, then serum
  2. The same order as venipuncture
  3. EDTA, then serum, then blood gas
  4. Serum, then EDTA, then blood gas

Answer: A. Blood gas, then EDTA, then other additive tubes, then serum

Why: Capillary order is deliberately different from venipuncture: EDTA comes early so the cell count is collected before platelets start clumping at the puncture site. Assuming the venipuncture order carries over is the classic mistake here.

Current NHA CPT test-plan locator: 3P / k72

Routine Blood Collections 12: Where is a heel stick performed on a three-week-old infant?
  1. The center of the heel
  2. The curve at the back of the heel
  3. The medial or lateral plantar surface of the heel
  4. The great toe

Answer: C. The medial or lateral plantar surface of the heel

Why: The medial and lateral plantar surfaces have enough soft tissue between skin and bone. The central and posterior heel are shallow there, and puncturing to bone risks osteomyelitis.

Current NHA CPT test-plan locator: 3O / k71

Routine Blood Collections 13: When and where are tubes labeled?
  1. At the patient's side, before you leave
  2. In the lab when you drop them off
  3. Before the draw, so the labels are ready
  4. At the nurses' station right afterward

Answer: A. At the patient's side, before you leave

Why: Labeling happens in front of the patient, before you walk away, so the specimen can never be separated from the identity it belongs to. Pre-labeling is just as dangerous, because a tube labeled before a failed draw can end up filled with someone else's blood.

Current NHA CPT test-plan locator: 3R / k22

Routine Blood Collections 14: The last tube is filled. What is the sequence for finishing?
  1. Activate the safety device, then withdraw the needle
  2. Apply pressure, then withdraw the needle, then release the tourniquet
  3. Release the tourniquet, remove the last tube, withdraw the needle, activate the safety device, then apply pressure
  4. Withdraw the needle, then release the tourniquet, then apply pressure

Answer: C. Release the tourniquet, remove the last tube, withdraw the needle, activate the safety device, then apply pressure

Why: The tourniquet comes off before the needle comes out, or the pressurized vein bleeds into the tissue. The safety device is activated the instant the needle clears the skin, before your attention moves to the site.

Current NHA CPT test-plan locator: 3M / k66

Special Collections: 6 questions (12% exam weight)

Special Collections 1: What most directly reduces contamination in a blood culture collection?
  1. Full antiseptic contact and dry time on the skin and the bottle tops
  2. Using a smaller needle gauge
  3. Drawing a larger total volume
  4. Collecting from a running IV line

Answer: A. Full antiseptic contact and dry time on the skin and the bottle tops

Why: Contamination is a skin-flora problem, so skin and bottle-top antisepsis with the full dry time is the control that matters. A contaminated culture can put a patient on antibiotics they never needed.

Current NHA CPT test-plan locator: 4A / k75

Special Collections 2: Blood cultures are ordered along with several additive tubes. Where do the culture bottles fall?
  1. In any position, since the bottles are sterile
  2. First, before any other tube
  3. After the light blue tube
  4. Last, after all additive tubes

Answer: B. First, before any other tube

Why: Blood cultures are collected first to protect sterility and avoid contamination or additive carryover from previously punctured tubes. That is why culture bottles precede citrate, serum, heparin, EDTA, and glycolytic-inhibitor tubes.

Current NHA CPT test-plan locator: 4A / k78

Special Collections 3: A two-hour glucose tolerance test is underway. What determines when the timed specimen is drawn?
  1. The moment the patient arrived
  2. The moment the patient finished the glucose drink
  3. The moment the fasting specimen was collected
  4. The moment the order was entered

Answer: B. The moment the patient finished the glucose drink

Why: The clock starts when the patient finishes the drink, and every later timed specimen is measured from that point. Starting the clock anywhere else shifts the whole curve and makes the result uninterpretable.

Current NHA CPT test-plan locator: 4H / k46

Special Collections 4: A blood alcohol specimen is being collected under a protocol that prohibits alcohol-containing skin preparations. What do you use?
  1. An alcohol wipe followed by dry gauze
  2. 70 percent isopropyl alcohol
  3. Any chlorhexidine product, regardless of ingredients
  4. A facility-approved alcohol-free antiseptic such as povidone-iodine

Answer: D. A facility-approved alcohol-free antiseptic such as povidone-iodine

Why: Follow the collection protocol and use a preparation verified to be alcohol-free. Product names alone are not enough because some chlorhexidine preparations contain alcohol; check the formulation supplied for the procedure.

Current NHA CPT test-plan locator: 4I / k85

Special Collections 5: You are collecting a newborn screening specimen on filter paper. What is correct technique?
  1. Press the card against the heel to spread the blood
  2. Layer several drops onto each circle until it looks dark
  3. Fill the circles from both sides for full saturation
  4. Fill each printed circle in one application, from one side only

Answer: D. Fill each printed circle in one application, from one side only

Why: Allow a large free-flowing drop to soak through the filter paper from one side and fill the printed circle in one application. Pressing the card to the heel, layering successive drops, or applying blood from both sides can create an uneven or unacceptable specimen.

Current NHA CPT test-plan locator: 4C / k81

Special Collections 6: A point-of-care glucose on an outpatient is below the facility's critical limit, and the patient is alert.
  1. Tell the patient to eat something and go home
  2. Repeat the test later that day
  3. Record the value and finish other draws first
  4. Immediately follow the critical-value protocol and notify the designated nurse or provider

Answer: D. Immediately follow the critical-value protocol and notify the designated nurse or provider

Why: A critical result requires immediate communication through the facility's defined chain. Looking well does not cancel the alert; document and notify the person designated by the critical-value procedure without delaying for other work.

Current NHA CPT test-plan locator: 4G / k93

Processing: 7 questions (14% exam weight)

Processing 1: A gold serum separator tube arrives for centrifugation ten minutes after collection.
  1. Invert it again, then spin it
  2. Refrigerate it, then spin it
  3. Let it finish clotting for the full time the manufacturer specifies, then spin
  4. Spin it right away to save time

Answer: C. Let it finish clotting for the full time the manufacturer specifies, then spin

Why: Spinning before the clot forms completely leaves fibrin in the serum, which clogs analyzers and produces bad results. The clotting time is a manufacturer specification, not a suggestion.

Current NHA CPT test-plan locator: 5A / k87

Processing 2: Which specimen needs protection from light?
  1. Sodium
  2. Bilirubin
  3. Hemoglobin A1c
  4. Potassium

Answer: B. Bilirubin

Why: Bilirubin breaks down on light exposure, so the specimen is wrapped or collected in an amber container. The falsely low result can matter a great deal in a newborn.

Current NHA CPT test-plan locator: 5B / k89

Processing 3: The laboratory's specimen manual says an ammonia sample requires immediate chilled transport. What do you do?
  1. Freeze the whole-blood tube
  2. Place it in the approved chilled transport and deliver it immediately
  3. Warm it to body temperature
  4. Leave it at room temperature until the end of rounds

Answer: B. Place it in the approved chilled transport and deliver it immediately

Why: Follow the laboratory's stated handling requirement exactly: use the approved chilled transport and deliver the specimen without delay. Do not substitute freezing or a different temperature condition unless the procedure specifically directs it.

Current NHA CPT test-plan locator: 5B / k89

Processing 4: What does the chain of custody form establish for a forensic specimen?
  1. That the patient consented to testing
  2. Every person who handled the specimen, with dates and times, from collection to testing
  3. That the collection technique met facility policy
  4. That the specimen was collected within its stability window

Answer: B. Every person who handled the specimen, with dates and times, from collection to testing

Why: Chain of custody documents continuous accountability for the specimen. A missing handoff can compromise the integrity or admissibility of a forensic result even when the collection technique itself was correct.

Current NHA CPT test-plan locator: 5C / k91

Processing 5: You are preparing aliquots from one patient's centrifuged specimen. How should the aliquot labels be handled?
  1. Use only the aliquot number
  2. Use only the collection time
  3. Leave them blank beside the parent tube
  4. Apply the identifiers required by laboratory policy so each aliquot remains traceable to the patient and parent specimen

Answer: D. Apply the identifiers required by laboratory policy so each aliquot remains traceable to the patient and parent specimen

Why: Each aliquot must remain traceable after it is separated from the parent tube. Apply every identifier required by the laboratory's labeling procedure rather than relying on location, memory, or a single partial identifier.

Current NHA CPT test-plan locator: 5A / k88

Processing 6: A specimen is entered into the laboratory information system. What does the accession number do?
  1. Replaces the patient identifiers on the tube
  2. Sets the specimen's expiration
  3. Links the specimen to the patient and the ordered tests through processing
  4. Records who collected the specimen

Answer: C. Links the specimen to the patient and the ordered tests through processing

Why: The accession number is the tracking handle the laboratory uses. It works alongside patient identifiers, never in place of them, which is why a tube keeps both.

Current NHA CPT test-plan locator: 5F / k92

Processing 7: The lab rejects a hemolyzed potassium specimen and a re-collection is needed.
  1. Have the lab estimate the value
  2. Report the original result with a note
  3. Contact the patient or unit per protocol to arrange re-collection and document it
  4. Wait for the provider to reorder

Answer: C. Contact the patient or unit per protocol to arrange re-collection and document it

Why: The laboratory has already rejected the specimen, so follow the re-collection procedure and document the contact. Hemolysis can falsely increase measured potassium; the rejected specimen is not converted into an acceptable result by adding a note.

Current NHA CPT test-plan locator: 5I / k74

Are these real NHA CPT exam questions?

Answer: No. They are original Castleport questions written to NHA's public test plan. They are not copied, recalled, leaked, purchased from a candidate, or taken from a live exam.

That boundary is not cosmetic. The NHA Candidate Handbook prohibits memorizing, reproducing, requesting, or sharing exam content. Violations can lead to score cancellation or credential action, including action taken after a credential has been issued.

Original practice is the safer and more useful route anyway. A recalled item teaches you one answer. A blueprint-based explanation teaches you the rule that can survive a different scenario.

What should you study after this practice test?

Answer: Fix the weakest high-weight domain first, then work through every missed rationale and run a timed mixed set.

Use this decision rule:

  • Safety and Compliance weak: start with sharps, exposure response, PPE and precautions, point-of-care quality control, privacy, scope, and emergencies.
  • Patient Preparation weak: start with positive identification, requisitions, consent, fasting and timed tests, positioning, site assessment, and EHR entry.
  • Routine Blood Collections weak: start with order of draw, site and equipment selection, tourniquet timing, angles, complications, finishing the draw, labeling, and inversion.
  • Special Collections weak: start with blood cultures, newborn screening, tolerance testing, blood-alcohol collection, point-of-care testing, and drug-screen procedures.
  • Processing weak: start with clotting and centrifugation, aliquots, temperature and light protection, chain of custody, accessioning, critical values, and re-collection.

Then open the free NHA CPT study-plan builder, enter your test date, and put your weak domains into a plan you can actually finish.

NHA CPT practice-test questions candidates ask next

How many questions are on the real NHA CPT exam? 120 multiple-choice questions in two hours: 100 scored and 20 unscored pretest items mixed together.

How many questions are on this practice test? 50 original questions, distributed exactly 13 / 10 / 14 / 6 / 7 across the five current domains.

What raw percentage do I need to pass? NHA does not publish one. The passing result is a scaled score of 390 on a 200–500 scale, and there is no public raw-to-scaled conversion.

Does this practice test predict whether I will pass? No. It identifies what you answered correctly on this set and where your misses occurred.

Are unanswered questions counted wrong? Yes. The result shows how many you answered and counts unanswered items as incorrect, so a partial attempt cannot look stronger than it was.

Why do the answer choices move on a retake? The tool uses a deterministic seeded shuffle for each attempt. That reduces letter-pattern memorization without changing the question or answer.

Is the test updated for the January 2026 blueprint? Yes. The domain split uses the NHA CPT test plan that took effect January 7, 2026, including Special Collections at 12% rather than 7%.

Do I need to buy NHA's study materials? No. NHA states that its preparation materials are not required to sit for an exam and do not guarantee a passing score.

Turn the result into the next move. Build your free NHA CPT study plan—weighted to the current blueprint, no sign-up, downloadable.

Castleport Test Prep publishes independent exam-prep guidance and original practice questions. Our editorial standards require current official sources, visible verification dates, original questions, and dated corrections; our independence policy explains how third-party exam names are used. We do not currently sell a CPT product. No ads, affiliate links, or sponsored placements appear on this page.

Castleport Test Prep is an independent publisher of exam preparation materials. We are not affiliated with, endorsed by, approved by, or connected to the National Healthcareer Association, any testing vendor, licensing board, or certification body. Exam and credential names are used descriptively for identification only. Castleport does not claim ownership of third-party names or marks.

Written by the Castleport Test Prep Editorial Team. Last verified: August 18, 2026. Found an error? Report it—corrections are published and dated.