Page 1 of 129
Medical Review Officer (MRO) Exam A&B ALL
400 QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE THIS YEAR
Medical Review Officer (MRO) Exam
ALL QUESTIONS AND VERIFIED CORRECT ANSWERS – 2026 FINAL EXAMINATION
Latest Update This Year
Certification: Medical Review Officer (MRO)
Exam Type: Practice Examination
Edition: 2026–2027
Content: Complete Questions with Verified Correct Answers
EXAMINATION INSTRUCTIONS
This examination evaluates knowledge of federal drug-testing regulations, including the Drug-
Free Workplace Program, SAMHSA and DOT requirements, specimen collection procedures,
MRO certification standards, and error prevention. Each question has one correct answer.
Rationales are based on SAMHSA guidelines, DOT regulations, and federal Custody and Control
Form (CCF) requirements.
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EXAM COVERAGE
• Federal Drug-Free Workplace Program testing requirements
• SAMHSA and DOT drug testing standards
• Specimen collection procedures and error prevention
• MRO roles and certification requirements
• Custody and Control Form (CCF) compliance
EXAM QUESTIONS
Question 2
Which of the following drug tests is NOT required for federal employees under the Federal
Drug-Free Workplace Program?
A. Preplacement
B. Post-accident
C. Return to duty
D. Unreasonable suspicion ✅
E. Random
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Rationale: SAMHSA specifies reasonable suspicion testing—not unreasonable suspicion—as a
valid testing category. The incorrect wording makes this option invalid under federal
requirements.
Question 3
Which of the following is considered the “weakest link” in the drug testing process, meaning it
produces the most frequent errors?
A. Specimen collection ✅
B. Laboratory testing
C. MRO review
Rationale: Specimen collection accounts for the highest number of errors due to minimal
training requirements, high staff turnover, lower wages, and frequent mistakes completing the
Custody and Control Form. Quality audits consistently identify collection as the most error-
prone step.
Question 4
MROs must pass a nationally recognized certifying examination for which of the following
activities?
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A. All MRO work
B. All federally regulated MRO work
C. All DHHS and DOT MRO work ✅
D. All states with provisions allowing medical marijuana
Rationale: Both SAMHSA (DHHS) and DOT explicitly require MROs performing regulated testing
to pass a nationally recognized certification exam. Other federal agencies and state marijuana
laws do not mandate MRO certification.
QUESTION: 5. Which of the following roles is primary for the MRO?
A.Lab checker
B.SAP advisor
C.Gatekeeper
D.Mediator
E.Substance Abuse Identifier - ANSWER-c
Although each of these monikers identify occasional, peripheral roles of the MRO, the DOT has
clearly earmarked the role of the MRO as a gatekeeper.
4
Medical Review Officer (MRO) Exam A&B ALL
400 QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE THIS YEAR
Medical Review Officer (MRO) Exam
ALL QUESTIONS AND VERIFIED CORRECT ANSWERS – 2026 FINAL EXAMINATION
Latest Update This Year
Certification: Medical Review Officer (MRO)
Exam Type: Practice Examination
Edition: 2026–2027
Content: Complete Questions with Verified Correct Answers
EXAMINATION INSTRUCTIONS
This examination evaluates knowledge of federal drug-testing regulations, including the Drug-
Free Workplace Program, SAMHSA and DOT requirements, specimen collection procedures,
MRO certification standards, and error prevention. Each question has one correct answer.
Rationales are based on SAMHSA guidelines, DOT regulations, and federal Custody and Control
Form (CCF) requirements.
1
, Page 2 of 129
EXAM COVERAGE
• Federal Drug-Free Workplace Program testing requirements
• SAMHSA and DOT drug testing standards
• Specimen collection procedures and error prevention
• MRO roles and certification requirements
• Custody and Control Form (CCF) compliance
EXAM QUESTIONS
Question 2
Which of the following drug tests is NOT required for federal employees under the Federal
Drug-Free Workplace Program?
A. Preplacement
B. Post-accident
C. Return to duty
D. Unreasonable suspicion ✅
E. Random
2
, Page 3 of 129
Rationale: SAMHSA specifies reasonable suspicion testing—not unreasonable suspicion—as a
valid testing category. The incorrect wording makes this option invalid under federal
requirements.
Question 3
Which of the following is considered the “weakest link” in the drug testing process, meaning it
produces the most frequent errors?
A. Specimen collection ✅
B. Laboratory testing
C. MRO review
Rationale: Specimen collection accounts for the highest number of errors due to minimal
training requirements, high staff turnover, lower wages, and frequent mistakes completing the
Custody and Control Form. Quality audits consistently identify collection as the most error-
prone step.
Question 4
MROs must pass a nationally recognized certifying examination for which of the following
activities?
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, Page 4 of 129
A. All MRO work
B. All federally regulated MRO work
C. All DHHS and DOT MRO work ✅
D. All states with provisions allowing medical marijuana
Rationale: Both SAMHSA (DHHS) and DOT explicitly require MROs performing regulated testing
to pass a nationally recognized certification exam. Other federal agencies and state marijuana
laws do not mandate MRO certification.
QUESTION: 5. Which of the following roles is primary for the MRO?
A.Lab checker
B.SAP advisor
C.Gatekeeper
D.Mediator
E.Substance Abuse Identifier - ANSWER-c
Although each of these monikers identify occasional, peripheral roles of the MRO, the DOT has
clearly earmarked the role of the MRO as a gatekeeper.
4
