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Key Facts: MLT Exam

210

Exam Questions

AMT current MLT exam format

3 hrs

Exam Time

AMT current MLT exam format

Scaled 70

Passing Score

AMT Candidate Handbook

64%

2025 Pass Rate

AMT Candidate Handbook (562 MLT examinees)

45 days

Minimum Retest Wait

AMT retesting policy

4

Lifetime Attempt Limit

AMT retesting policy

The current AMT MLT examination contains 210 four-option multiple-choice questions and allows 3 hours. A scaled score of at least 70 on AMT's 0–100 reporting scale is required; that is not a fixed raw 70%. AMT's 2025 data reports a 64% pass rate among 562 MLT examinees. The current outline contains nine official work areas, led by Clinical Chemistry (18%), Urinalysis and Body Fluids (16%), and Microbiology (15%).

Sample MLT Practice Questions

Try these sample questions to review concepts for the MLT exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 131+ question experience with AI tutoring.

1Which blood collection tube contains EDTA and is used for CBC testing?
A.Light blue top
B.Lavender top
C.Green top
D.Gray top
Explanation: Lavender (purple) top tubes contain EDTA, a chelating anticoagulant that preserves cellular morphology, making them ideal for CBC and other hematology testing.
2According to CLSI order of draw, which tube is collected immediately after the light blue (citrate) tube?
A.Lavender (EDTA)
B.Gray (fluoride)
C.Red or gold/SST
D.Green (heparin)
Explanation: The CLSI order of draw is: blood culture, light blue (citrate), red/SST, green (heparin), lavender (EDTA), then gray (fluoride). Red or SST follows the light blue.
3A hemolyzed specimen will MOST falsely elevate which analyte?
A.Sodium
B.Potassium
C.Chloride
D.Calcium
Explanation: Potassium is highly concentrated inside red blood cells (~150 mEq/L). Hemolysis releases intracellular potassium into serum, causing falsely elevated results.
4Which Westgard rule signals that a control run should be REJECTED?
A.1-2s
B.1-3s
C.R-1s
D.Mean shift
Explanation: The 1-3s Westgard rule (one control exceeding the mean by 3 SD) is a rejection rule indicating a significant random error in the run.
5A potassium result of 6.8 mEq/L in a non-hemolyzed sample is reported. What action is required?
A.Repeat in 24 hours
B.Notify physician immediately as a critical value
C.Hold and confirm with another lab
D.Report and chart only
Explanation: Potassium >6.0 mEq/L is a critical value that requires immediate notification of the physician because hyperkalemia can cause cardiac arrhythmias.
6A fasting plasma glucose of 132 mg/dL on two separate occasions meets the diagnostic criteria for which condition?
A.Impaired fasting glucose
B.Diabetes mellitus
C.Hypoglycemia
D.Normal
Explanation: Diabetes is diagnosed when fasting plasma glucose is 126 mg/dL or greater on two occasions. 132 mg/dL meets this threshold.
7Which HbA1c result is consistent with a diagnosis of diabetes mellitus?
A.5.0%
B.5.7%
C.6.2%
D.7.0%
Explanation: An HbA1c of 6.5% or greater is diagnostic for diabetes. 7.0% clearly meets this criterion.
8Which enzyme is most specific for myocardial injury?
A.AST
B.LDH
C.Cardiac troponin I
D.Total CK
Explanation: Cardiac troponin I (cTnI) is highly specific for myocardial cell injury and is the gold-standard marker for acute MI.
9A patient has the following ABO results: forward type shows agglutination with anti-A only; reverse type shows agglutination with B cells only. What is the patient's blood type?
A.Type O
B.Type A
C.Type B
D.Type AB
Explanation: Patient red cells reacting with anti-A indicates A antigen present. Serum reacting with B cells confirms anti-B in serum. Both findings = type A.
10An Rh-negative mother delivers an Rh-positive baby. What is the standard postpartum dose of RhoGAM?
A.50 µg IM
B.150 µg IM
C.300 µg IM
D.1,000 µg IM
Explanation: A standard 300 µg IM dose of RhoGAM (Rh immune globulin) covers up to 30 mL of fetal whole blood (15 mL of RBCs) and is given within 72 hours of delivery.

About the MLT Exam

The American Medical Technologists Medical Laboratory Technician certification examination is a 210-question, computer-based generalist laboratory exam. It is a separate credential and blueprint from ASCP MLT.

Exam sponsor: AMT. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

210 questions

Time Limit

3 hours

Passing Score

Scaled score of 70 or higher on AMT's 0–100 scale

Exam / Certification Fees

$225

Exam sponsor website

Reported exam pass rate: 64% in 2025 (562 AMT MLT examinees). AMT Candidate Handbook 2025 examination statistics This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

13%

General Laboratory

Laboratory quality, safety, specimen handling, calculations, and general operations

18%

Clinical Chemistry

Chemistry methods, analytes, instrumentation, interferences, endocrinology, and toxicology

13%

Hematology

Blood cells, counts, morphology, anemias, leukocyte disorders, and automated methods

5%

Coagulation and Hemostasis

Primary and secondary hemostasis, coagulation testing, fibrinolysis, and anticoagulants

4%

Immunology and Serology

Immune principles, antigen-antibody methods, infectious serology, and autoimmunity

10%

Immunohematology

ABO/Rh, antibody detection, antiglobulin testing, compatibility, and HDFN

6%

Blood Banking and Transfusion Services

Components, storage, selection, transfusion reactions, and transfusion service practice

15%

Microbiology

Bacteriology, mycology, parasitology, virology, media, identification, and susceptibility testing

16%

Urinalysis and Body Fluids

Urine physical, chemical, and microscopic testing plus CSF and serous-fluid analysis

Preparing for the MLT Exam

What You Need to Know

  • Passing score: Scaled score of 70 or higher on AMT's 0–100 scale
  • Exam length: 210 questions
  • Time limit: 3 hours
  • Exam / certification fees: $225 Official sources

Using Our Practice Resources

  • Work through all 131 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

MLT: Suggested Study Strategy

1Master the CLSI order of draw and the consequences of incorrect order (cross-contamination)
2Memorize hemolysis interferences: raises K, LDH, AST, PO4; lowers Na (dilution)
3Drill ABO front/back typing and discrepancies (weak A subgroup, BMT chimera)
4Apply Rule of 3 (HCT ≈ 3× HGB; HGB ≈ 3× RBC) as a quick CBC sanity check
5Know component shelf life: PRBC 42d AS-1, FFP 1y frozen / 24h thawed, platelets 5d at 20-24°C with agitation

Frequently Asked Questions

What is the current AMT MLT exam format?

AMT identifies 210 four-option multiple-choice questions and a 3-hour limit. AMT states that unidentified unscored pretest items may be embedded. The exam is computer-based; current official material reviewed here does not establish a computer-adaptive format.

What score is required to pass AMT MLT?

AMT requires a scaled score of at least 70 on a 0–100 reporting scale. This criterion-referenced scaled score is not a statement that exactly 70% raw correct passes.

What is the current published pass rate?

The AMT Candidate Handbook reports that 64% of 562 MLT examinees passed in 2025. It is an annual aggregate, not a prediction for one candidate.

What happens after an unsuccessful attempt?

The candidate waits at least 45 days, applies and pays for retesting, and retakes the full examination. AMT limits a candidate to four lifetime attempts in one certification discipline.

Who is eligible for AMT MLT?

AMT publishes Education, Military, and Alternate Education routes. Each route has exact degree or semester-hour, laboratory-coursework, training, recent-experience, clinical-discipline, transcript, and verification requirements; applicants should use the current AMT route page.

How is AMT certification maintained?

An MLT certificant pays the annual renewal fee and completes 45 Certification Continuation Program points during each three-year CCP cycle.