MEDICAL LABORATORY TECHNICIAN
AMT MLT EXAM (Version 2)
Actual Questions and Answers A+
2026/2027 Official Exam
American Medical Technologists Aligned • Professional Certification Level
A+ QUESTIONS 6 SECTIONS 100%
VERIFIED COVERED RATIONALES
CATEGORIES
1. General Laboratory
2. Clinical Chemistry
3. Hematology
4. Coagulation, Immunology & Serology
5. Immunohematology & Blood Banking
6. Microbiology, Urinalysis & Body Fluids
STUVIAACTUALEXAM
,Section 1: General Laboratory
Q1. A newly hired medical laboratory technician is reviewing the laboratory’s quality management system before beginning
independent testing. The supervisor emphasizes that a documented procedure must be followed whenever an instrument fails a
daily quality-control run. Which action best demonstrates compliance with CLIA and laboratory accreditation standards in this
situation?
A. Stop patient testing on the affected analyte, troubleshoot according to the written protocol, and document all corrective
actions before resuming.
B. Continue patient testing and repeat QC at the end of the shift.
C. Adjust the calibration curve until the QC material falls within range.
D. Replace the QC material with a different lot and retest immediately.
Correct Answer: A
Rationale: CLIA and accrediting agencies require that patient testing be suspended when QC is out of control. The written protocol must be
followed, corrective actions documented, and acceptable QC obtained before patient results are released.
Q2. During a routine safety inspection, a technologist discovers an unlabeled secondary container of a reagent on the bench. The
primary container is still available in the cabinet. What is the most appropriate immediate action according to OSHA Hazard
Communication standards?
A. Label the secondary container with the identity of the chemical and appropriate hazard warnings before further use.
B. Leave the container in place because the primary label is accessible.
C. Pour the reagent back into the primary container and discard the secondary vessel.
D. Dispose of the secondary container as hazardous waste without labeling.
Correct Answer: A
Rationale: OSHA requires that secondary containers be labeled with the chemical identity and hazard warnings when the material is not used
immediately by the person who transferred it. Proper labeling protects all staff who may encounter the container.
Q3. A laboratory receives a specimen labeled with the patient’s name and date of birth but missing the unique medical record
number required by the facility’s policy. The specimen is a STAT chemistry panel. Which decision is most consistent with
pre-analytical quality standards?
A. Process the specimen immediately because it is labeled with two identifiers.
B. Reject the specimen and request a properly labeled recollection, documenting the rejection.
C. Add the medical record number from the requisition and proceed with testing.
D. Call the floor, obtain verbal confirmation of the number, and proceed without documentation.
Correct Answer: B
Rationale: Most laboratories require a minimum of two unique identifiers that match the requisition exactly. Missing required identifiers
necessitate rejection and recollection to prevent patient misidentification errors.
Q4. An analyzer requires a 1:5 dilution of a patient serum sample that has an analyte concentration above the linear range. The
technologist pipettes 200 µL of serum into a tube. How much diluent must be added to achieve the correct dilution?
A. 200 µL
B. 1000 µL
C. 400 µL
D. 800 µL
Correct Answer: D
Rationale: A 1:5 dilution means 1 part sample + 4 parts diluent. For 200 µL sample, 4 × 200 = 800 µL diluent is required, yielding a total volume
of 1000 µL.
AMT MLT EXAM (Version 2) • 2026/2027 • Page 2
, Q5. A laboratory is preparing for an unannounced CAP inspection. The quality coordinator asks the MLT to locate documentation
of the last two instrument calibration verifications for the chemistry analyzer. Which regulatory requirement is being addressed?
A. Personnel competency assessment
B. Proficiency testing enrollment
C. Method validation and performance specification verification
D. Safety data sheet inventory
Correct Answer: C
Rationale: CLIA and CAP require that laboratories verify or establish performance specifications, including calibration verification at defined
intervals, and retain the documentation for inspection.
Q6. While performing venipuncture, an MLT observes that the vacuum tube has not filled to the proper volume. The test ordered
is a PT/INR. What is the most likely consequence if the under-filled tube is accepted for testing?
A. Falsely shortened clotting times due to excess anticoagulant.
B. No effect because the reagent volume compensates automatically.
C. Falsely prolonged clotting times due to excess anticoagulant relative to blood volume.
D. Hemolysis that elevates potassium only.
Correct Answer: C
Rationale: Sodium citrate tubes require a precise 9:1 blood-to-anticoagulant ratio. Under-filling leaves excess citrate, which binds calcium and
prolongs clotting times, producing falsely elevated PT/INR results.
Q7. A laboratory information system flags a critical sodium result of 118 mmol/L. The MLT has already verified the result by
repeat analysis. According to standard laboratory protocol, what is the next required action?
A. File the result without further action because it has been repeated.
B. Immediately notify the responsible caregiver, document the notification, and include the time and name of the person
notified.
C. Wait until the end of the shift to batch all critical calls.
D. Only notify the caregiver if the result is confirmed by a second specimen.
Correct Answer: B
Rationale: Critical values must be reported promptly to a licensed caregiver who can act on the information. Documentation of the notification,
including time and recipient, is required for quality and legal purposes.
Q8. An MLT is calculating the coefficient of variation for a QC material that has a mean of 100 mg/dL and a standard deviation of
2.5 mg/dL. What is the CV?
A. 0.025%
B. 25%
C. 4.0%
D. 2.5%
Correct Answer: D
Rationale: CV = (SD / mean) × 100 = (2.) × 100 = 2.5%. The coefficient of variation expresses precision relative to the mean and is
widely used for QC monitoring.
Q9. A fire breaks out in a laboratory storage area containing flammable solvents. The MLT is the first person to notice the flames.
Using the RACE acronym, what is the correct first action?
A. Rescue anyone in immediate danger, then activate the alarm.
B. Attempt to extinguish the fire with a portable extinguisher.
C. Close all doors and windows to contain the smoke.
D. Retrieve the SDS binder before leaving the area.
Correct Answer: A
Rationale: RACE stands for Rescue, Alarm, Confine, Extinguish/Evacuate. The priority is to remove people from immediate danger, then
activate the fire alarm system.
AMT MLT EXAM (Version 2) • 2026/2027 • Page 3
AMT MLT EXAM (Version 2)
Actual Questions and Answers A+
2026/2027 Official Exam
American Medical Technologists Aligned • Professional Certification Level
A+ QUESTIONS 6 SECTIONS 100%
VERIFIED COVERED RATIONALES
CATEGORIES
1. General Laboratory
2. Clinical Chemistry
3. Hematology
4. Coagulation, Immunology & Serology
5. Immunohematology & Blood Banking
6. Microbiology, Urinalysis & Body Fluids
STUVIAACTUALEXAM
,Section 1: General Laboratory
Q1. A newly hired medical laboratory technician is reviewing the laboratory’s quality management system before beginning
independent testing. The supervisor emphasizes that a documented procedure must be followed whenever an instrument fails a
daily quality-control run. Which action best demonstrates compliance with CLIA and laboratory accreditation standards in this
situation?
A. Stop patient testing on the affected analyte, troubleshoot according to the written protocol, and document all corrective
actions before resuming.
B. Continue patient testing and repeat QC at the end of the shift.
C. Adjust the calibration curve until the QC material falls within range.
D. Replace the QC material with a different lot and retest immediately.
Correct Answer: A
Rationale: CLIA and accrediting agencies require that patient testing be suspended when QC is out of control. The written protocol must be
followed, corrective actions documented, and acceptable QC obtained before patient results are released.
Q2. During a routine safety inspection, a technologist discovers an unlabeled secondary container of a reagent on the bench. The
primary container is still available in the cabinet. What is the most appropriate immediate action according to OSHA Hazard
Communication standards?
A. Label the secondary container with the identity of the chemical and appropriate hazard warnings before further use.
B. Leave the container in place because the primary label is accessible.
C. Pour the reagent back into the primary container and discard the secondary vessel.
D. Dispose of the secondary container as hazardous waste without labeling.
Correct Answer: A
Rationale: OSHA requires that secondary containers be labeled with the chemical identity and hazard warnings when the material is not used
immediately by the person who transferred it. Proper labeling protects all staff who may encounter the container.
Q3. A laboratory receives a specimen labeled with the patient’s name and date of birth but missing the unique medical record
number required by the facility’s policy. The specimen is a STAT chemistry panel. Which decision is most consistent with
pre-analytical quality standards?
A. Process the specimen immediately because it is labeled with two identifiers.
B. Reject the specimen and request a properly labeled recollection, documenting the rejection.
C. Add the medical record number from the requisition and proceed with testing.
D. Call the floor, obtain verbal confirmation of the number, and proceed without documentation.
Correct Answer: B
Rationale: Most laboratories require a minimum of two unique identifiers that match the requisition exactly. Missing required identifiers
necessitate rejection and recollection to prevent patient misidentification errors.
Q4. An analyzer requires a 1:5 dilution of a patient serum sample that has an analyte concentration above the linear range. The
technologist pipettes 200 µL of serum into a tube. How much diluent must be added to achieve the correct dilution?
A. 200 µL
B. 1000 µL
C. 400 µL
D. 800 µL
Correct Answer: D
Rationale: A 1:5 dilution means 1 part sample + 4 parts diluent. For 200 µL sample, 4 × 200 = 800 µL diluent is required, yielding a total volume
of 1000 µL.
AMT MLT EXAM (Version 2) • 2026/2027 • Page 2
, Q5. A laboratory is preparing for an unannounced CAP inspection. The quality coordinator asks the MLT to locate documentation
of the last two instrument calibration verifications for the chemistry analyzer. Which regulatory requirement is being addressed?
A. Personnel competency assessment
B. Proficiency testing enrollment
C. Method validation and performance specification verification
D. Safety data sheet inventory
Correct Answer: C
Rationale: CLIA and CAP require that laboratories verify or establish performance specifications, including calibration verification at defined
intervals, and retain the documentation for inspection.
Q6. While performing venipuncture, an MLT observes that the vacuum tube has not filled to the proper volume. The test ordered
is a PT/INR. What is the most likely consequence if the under-filled tube is accepted for testing?
A. Falsely shortened clotting times due to excess anticoagulant.
B. No effect because the reagent volume compensates automatically.
C. Falsely prolonged clotting times due to excess anticoagulant relative to blood volume.
D. Hemolysis that elevates potassium only.
Correct Answer: C
Rationale: Sodium citrate tubes require a precise 9:1 blood-to-anticoagulant ratio. Under-filling leaves excess citrate, which binds calcium and
prolongs clotting times, producing falsely elevated PT/INR results.
Q7. A laboratory information system flags a critical sodium result of 118 mmol/L. The MLT has already verified the result by
repeat analysis. According to standard laboratory protocol, what is the next required action?
A. File the result without further action because it has been repeated.
B. Immediately notify the responsible caregiver, document the notification, and include the time and name of the person
notified.
C. Wait until the end of the shift to batch all critical calls.
D. Only notify the caregiver if the result is confirmed by a second specimen.
Correct Answer: B
Rationale: Critical values must be reported promptly to a licensed caregiver who can act on the information. Documentation of the notification,
including time and recipient, is required for quality and legal purposes.
Q8. An MLT is calculating the coefficient of variation for a QC material that has a mean of 100 mg/dL and a standard deviation of
2.5 mg/dL. What is the CV?
A. 0.025%
B. 25%
C. 4.0%
D. 2.5%
Correct Answer: D
Rationale: CV = (SD / mean) × 100 = (2.) × 100 = 2.5%. The coefficient of variation expresses precision relative to the mean and is
widely used for QC monitoring.
Q9. A fire breaks out in a laboratory storage area containing flammable solvents. The MLT is the first person to notice the flames.
Using the RACE acronym, what is the correct first action?
A. Rescue anyone in immediate danger, then activate the alarm.
B. Attempt to extinguish the fire with a portable extinguisher.
C. Close all doors and windows to contain the smoke.
D. Retrieve the SDS binder before leaving the area.
Correct Answer: A
Rationale: RACE stands for Rescue, Alarm, Confine, Extinguish/Evacuate. The priority is to remove people from immediate danger, then
activate the fire alarm system.
AMT MLT EXAM (Version 2) • 2026/2027 • Page 3
