OCCUPATIONAL MEDICINE · MRO CERTIFICATION
MRO TEST REVIEW 2026/2027 QUESTIONS & ANSWERS
RATED 100% CORRECT!! 2026/2027
A+
Complete Blueprint Coverage · Verified Rationales
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QUESTIONS VERIFIED EXAM DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
Section 1: Federal Regulations and MRO Role
Section 2: Collection, Chain of Custody, and Specimen Validity
Section 3: Laboratory Testing and Result Interpretation
Section 4: Donor Interview, Medical Review, and Verification
Section 5: Reporting, Return-to-Duty, and Program Compliance
STUVIAACTUALEXAM
, SECTION 1: FEDERAL REGULATIONS AND MRO ROLE
Question 1
A physician has completed the required MRO training and examination and is asked to serve as the primary MRO for a
DOT-regulated motor carrier. Before performing verification interviews, which additional requirement must be satisfied
under 49 CFR Part 40?
A. The physician must hold a current medical license and complete the qualification process specified for MROs, including
documentation of training and examination.
B. The physician needs only a DEA registration number and no separate MRO qualification.
C. Any licensed nurse practitioner may perform MRO verification without physician involvement.
D. MRO status is automatic for any physician who has ordered a urine drug screen once.
Correct Answer: A
Rationale:
Part 40 requires MROs to be licensed physicians who have completed specified training and a qualifying examination. DEA
registration alone or non-physician status does not meet the MRO definition for DOT testing.
Question 2
An employer asks the MRO to disclose the specific drug metabolite concentrations from a verified positive DOT test to a
supervisor who is not the designated employer representative (DER). How should the MRO respond?
A. Provide full quantitative results to any company employee who requests them.
B. Limit disclosure to the DER (or other authorized recipient under Part 40) and report only the verified result, not
unnecessary quantitative detail, consistent with confidentiality rules.
C. Publish the results in the employee newsletter for workplace transparency.
D. Refuse to report any result to the employer under any circumstance.
Correct Answer: B
Rationale:
Part 40 restricts result disclosure to the DER and other specifically authorized parties. MROs report verified results; they do not
broadly release quantitative data to unauthorized supervisors.
Question 3
A company operates both DOT-regulated truck drivers and non-DOT office staff. The employer wants a single
drug-testing policy that applies Part 40 procedures to everyone. Which statement is most accurate?
A. Part 40 procedures are mandatory only for DOT-regulated testing; non-DOT testing may follow different protocols, though
many employers voluntarily mirror Part 40 for consistency.
B. Part 40 automatically governs all private-sector workplace testing in the United States.
C. Non-DOT employees must be tested under HHS Mandatory Guidelines exclusively.
D. MROs are prohibited from reviewing any non-DOT test under any circumstance.
Correct Answer: A
Rationale:
49 CFR Part 40 applies to DOT-regulated testing. Non-DOT testing is governed by company policy and applicable state law;
employers often adopt similar procedures but are not required to follow Part 40 for non-regulated staff.
MRO TEST REVIEW 2026/2027 Page 2
MRO TEST REVIEW 2026/2027 QUESTIONS & ANSWERS
RATED 100% CORRECT!! 2026/2027
A+
Complete Blueprint Coverage · Verified Rationales
A+ 5 100%
QUESTIONS VERIFIED EXAM DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
Section 1: Federal Regulations and MRO Role
Section 2: Collection, Chain of Custody, and Specimen Validity
Section 3: Laboratory Testing and Result Interpretation
Section 4: Donor Interview, Medical Review, and Verification
Section 5: Reporting, Return-to-Duty, and Program Compliance
STUVIAACTUALEXAM
, SECTION 1: FEDERAL REGULATIONS AND MRO ROLE
Question 1
A physician has completed the required MRO training and examination and is asked to serve as the primary MRO for a
DOT-regulated motor carrier. Before performing verification interviews, which additional requirement must be satisfied
under 49 CFR Part 40?
A. The physician must hold a current medical license and complete the qualification process specified for MROs, including
documentation of training and examination.
B. The physician needs only a DEA registration number and no separate MRO qualification.
C. Any licensed nurse practitioner may perform MRO verification without physician involvement.
D. MRO status is automatic for any physician who has ordered a urine drug screen once.
Correct Answer: A
Rationale:
Part 40 requires MROs to be licensed physicians who have completed specified training and a qualifying examination. DEA
registration alone or non-physician status does not meet the MRO definition for DOT testing.
Question 2
An employer asks the MRO to disclose the specific drug metabolite concentrations from a verified positive DOT test to a
supervisor who is not the designated employer representative (DER). How should the MRO respond?
A. Provide full quantitative results to any company employee who requests them.
B. Limit disclosure to the DER (or other authorized recipient under Part 40) and report only the verified result, not
unnecessary quantitative detail, consistent with confidentiality rules.
C. Publish the results in the employee newsletter for workplace transparency.
D. Refuse to report any result to the employer under any circumstance.
Correct Answer: B
Rationale:
Part 40 restricts result disclosure to the DER and other specifically authorized parties. MROs report verified results; they do not
broadly release quantitative data to unauthorized supervisors.
Question 3
A company operates both DOT-regulated truck drivers and non-DOT office staff. The employer wants a single
drug-testing policy that applies Part 40 procedures to everyone. Which statement is most accurate?
A. Part 40 procedures are mandatory only for DOT-regulated testing; non-DOT testing may follow different protocols, though
many employers voluntarily mirror Part 40 for consistency.
B. Part 40 automatically governs all private-sector workplace testing in the United States.
C. Non-DOT employees must be tested under HHS Mandatory Guidelines exclusively.
D. MROs are prohibited from reviewing any non-DOT test under any circumstance.
Correct Answer: A
Rationale:
49 CFR Part 40 applies to DOT-regulated testing. Non-DOT testing is governed by company policy and applicable state law;
employers often adopt similar procedures but are not required to follow Part 40 for non-regulated staff.
MRO TEST REVIEW 2026/2027 Page 2
