MRO Practice Exam 2025/2026 | 100
Verified Questions with Complete
Solutions | Graded A+|| LATEST UPDATE
1. The primary role of the Medical Review Officer (MRO) is to:
A. Collect specimens
B. Interpret and verify drug test results
C. Supervise laboratory staff
D. Discipline employees
Correct Answer: B
Rationale: The MRO is responsible for reviewing laboratory results and determining their
medical legitimacy.
2. An MRO must be a:
A. Registered nurse
B. Certified laboratory technician
C. Licensed physician (MD or DO)
D. Pharmacist
Correct Answer: C
Rationale: Federal regulations require MROs to be licensed physicians.
3. The MRO serves as an:
A. Employer advocate
B. Employee advocate
C. Independent medical intermediary
D. Legal representative
Correct Answer: C
Rationale: The MRO acts independently to ensure fair and accurate result interpretation.
,4. The MRO’s authority comes from:
A. Employer policy
B. Federal regulations
C. Laboratory procedures
D. Union contracts
Correct Answer: B
Rationale: MRO duties and authority are defined by federal drug testing regulations.
FEDERAL DRUG TESTING PROGRAMS
5. DOT drug testing applies to:
A. All employees
B. Safety-sensitive positions
C. Office staff only
D. Volunteers
Correct Answer: B
Rationale: DOT testing is required for employees in safety-sensitive roles.
6. DOT-regulated drug testing programs are overseen by:
A. OSHA
B. SAMHSA
C. Department of Transportation
D. DEA
Correct Answer: C
Rationale: The DOT establishes drug testing requirements for regulated industries.
7. SAMHSA’s role in drug testing includes:
A. Enforcing employer discipline
B. Certifying laboratories and MROs
C. Conducting collections
D. Issuing CDL licenses
,Correct Answer: B
Rationale: SAMHSA certifies laboratories and sets testing standards.
8. Non-DOT drug testing is governed by:
A. Federal DOT rules
B. Employer policy and state law
C. SAMHSA exclusively
D. OSHA standards
Correct Answer: B
Rationale: Non-DOT testing follows employer policies and applicable state laws.
SPECIMEN TYPES
9. The federally approved specimen for DOT drug testing is:
A. Blood
B. Hair
C. Urine
D. Saliva
Correct Answer: C
Rationale: Urine is currently the only approved specimen for DOT testing.
10. Oral fluid testing under DOT rules:
A. Is prohibited
B. Has been authorized but limited
C. Replaces urine testing
D. Is required for post-accident tests
Correct Answer: B
Rationale: DOT has authorized oral fluid testing under specific conditions.
11. A shy bladder situation occurs when:
, A. Donor refuses testing
B. Insufficient urine is provided
C. Specimen is spilled
D. Temperature is out of range
Correct Answer: B
Rationale: Shy bladder refers to an inability to provide a sufficient urine specimen.
12. The maximum time allowed for a shy bladder process is:
A. 30 minutes
B. 1 hour
C. 3 hours
D. 24 hours
Correct Answer: C
Rationale: Regulations allow up to three hours for completion.
CHAIN OF CUSTODY
13. The chain of custody form (CCF) documents:
A. Employee discipline
B. Laboratory equipment
C. Handling and transfer of specimens
D. MRO credentials
Correct Answer: C
Rationale: The CCF ensures specimen integrity from collection to reporting.
14. A fatal flaw in the CCF requires:
A. Retesting
B. Cancellation of the test
C. Employer decision
D. MRO override
Correct Answer: B
Rationale: Fatal flaws invalidate the test result.
Verified Questions with Complete
Solutions | Graded A+|| LATEST UPDATE
1. The primary role of the Medical Review Officer (MRO) is to:
A. Collect specimens
B. Interpret and verify drug test results
C. Supervise laboratory staff
D. Discipline employees
Correct Answer: B
Rationale: The MRO is responsible for reviewing laboratory results and determining their
medical legitimacy.
2. An MRO must be a:
A. Registered nurse
B. Certified laboratory technician
C. Licensed physician (MD or DO)
D. Pharmacist
Correct Answer: C
Rationale: Federal regulations require MROs to be licensed physicians.
3. The MRO serves as an:
A. Employer advocate
B. Employee advocate
C. Independent medical intermediary
D. Legal representative
Correct Answer: C
Rationale: The MRO acts independently to ensure fair and accurate result interpretation.
,4. The MRO’s authority comes from:
A. Employer policy
B. Federal regulations
C. Laboratory procedures
D. Union contracts
Correct Answer: B
Rationale: MRO duties and authority are defined by federal drug testing regulations.
FEDERAL DRUG TESTING PROGRAMS
5. DOT drug testing applies to:
A. All employees
B. Safety-sensitive positions
C. Office staff only
D. Volunteers
Correct Answer: B
Rationale: DOT testing is required for employees in safety-sensitive roles.
6. DOT-regulated drug testing programs are overseen by:
A. OSHA
B. SAMHSA
C. Department of Transportation
D. DEA
Correct Answer: C
Rationale: The DOT establishes drug testing requirements for regulated industries.
7. SAMHSA’s role in drug testing includes:
A. Enforcing employer discipline
B. Certifying laboratories and MROs
C. Conducting collections
D. Issuing CDL licenses
,Correct Answer: B
Rationale: SAMHSA certifies laboratories and sets testing standards.
8. Non-DOT drug testing is governed by:
A. Federal DOT rules
B. Employer policy and state law
C. SAMHSA exclusively
D. OSHA standards
Correct Answer: B
Rationale: Non-DOT testing follows employer policies and applicable state laws.
SPECIMEN TYPES
9. The federally approved specimen for DOT drug testing is:
A. Blood
B. Hair
C. Urine
D. Saliva
Correct Answer: C
Rationale: Urine is currently the only approved specimen for DOT testing.
10. Oral fluid testing under DOT rules:
A. Is prohibited
B. Has been authorized but limited
C. Replaces urine testing
D. Is required for post-accident tests
Correct Answer: B
Rationale: DOT has authorized oral fluid testing under specific conditions.
11. A shy bladder situation occurs when:
, A. Donor refuses testing
B. Insufficient urine is provided
C. Specimen is spilled
D. Temperature is out of range
Correct Answer: B
Rationale: Shy bladder refers to an inability to provide a sufficient urine specimen.
12. The maximum time allowed for a shy bladder process is:
A. 30 minutes
B. 1 hour
C. 3 hours
D. 24 hours
Correct Answer: C
Rationale: Regulations allow up to three hours for completion.
CHAIN OF CUSTODY
13. The chain of custody form (CCF) documents:
A. Employee discipline
B. Laboratory equipment
C. Handling and transfer of specimens
D. MRO credentials
Correct Answer: C
Rationale: The CCF ensures specimen integrity from collection to reporting.
14. A fatal flaw in the CCF requires:
A. Retesting
B. Cancellation of the test
C. Employer decision
D. MRO override
Correct Answer: B
Rationale: Fatal flaws invalidate the test result.
