Page 1 of 137
ADCI Surface Supplied Mixed Gas Diver
Certification Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
Pdf.
Question 1
Scenario: A commercial diving company is bidding on a federal
underwater construction project. The project specifications require
compliance with "the recognized industry standard for
commercial diving safety." The safety director needs to identify
the correct standard.
The ADCI International Consensus Standards for Commercial
Diving and Underwater Operations are cited as the
,Page 2 of 137
authoritative source for best practices by which U.S.
government agencies?
A) EPA, CDC, and FEMA
B) OSHA, the U.S. Coast Guard, and the U.S. Army Corps of
Engineers
C) NIOSH, FEMA, and the Department of Defense
D) The Department of Labor and the Department of
Transportation only
Answer: B
Rationale: The ADCI Consensus Standards are specifically cited
by OSHA, the U.S. Coast Guard, and the U.S. Army Corps of
Engineers as the authoritative document for best practices in
commercial diving. Compliance with ADCI standards is
considered compliance with federal diving regulations for
member companies .
,Page 3 of 137
Question 2
Scenario: A commercial diver with 8 years of air diving
experience wants to upgrade to Mixed-Gas Diver certification.
The diver has 60 air working dives and 8 mixed-gas working
dives in the last 18 months.
To qualify for the ADCI Mixed-Gas Diver certification card, an
applicant must have a minimum of how many logged
working dives?
A) 25 Air dives and 5 Mixed-Gas dives
B) 50 Air dives and 10 Mixed-Gas HeO₂ dives
C) 100 Air dives and 25 Mixed-Gas dives
D) 50 Air dives and 25 Mixed-Gas dives
Answer: B
Rationale: ADCI requires documented proof of 50 Air working
dives and 10 Mixed-Gas HeO₂ dives, plus at least 100 Air and
, Page 4 of 137
50 Mixed-Gas field days. These dives must be signed off by a
supervisor and performed within a 24-month period immediately
prior to certification .
Question 3
Scenario: A diving school is designing a curriculum for
commercial diver training. The school wants to ensure its program
meets ADCI requirements for graduate certification eligibility.
The minimum hours of formal instruction required for
commercial diver training to qualify for ADCI certification is:
A) 300 hours
B) 500 hours
C) 625 hours
D) 800 hours
Answer: C
ADCI Surface Supplied Mixed Gas Diver
Certification Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
Pdf.
Question 1
Scenario: A commercial diving company is bidding on a federal
underwater construction project. The project specifications require
compliance with "the recognized industry standard for
commercial diving safety." The safety director needs to identify
the correct standard.
The ADCI International Consensus Standards for Commercial
Diving and Underwater Operations are cited as the
,Page 2 of 137
authoritative source for best practices by which U.S.
government agencies?
A) EPA, CDC, and FEMA
B) OSHA, the U.S. Coast Guard, and the U.S. Army Corps of
Engineers
C) NIOSH, FEMA, and the Department of Defense
D) The Department of Labor and the Department of
Transportation only
Answer: B
Rationale: The ADCI Consensus Standards are specifically cited
by OSHA, the U.S. Coast Guard, and the U.S. Army Corps of
Engineers as the authoritative document for best practices in
commercial diving. Compliance with ADCI standards is
considered compliance with federal diving regulations for
member companies .
,Page 3 of 137
Question 2
Scenario: A commercial diver with 8 years of air diving
experience wants to upgrade to Mixed-Gas Diver certification.
The diver has 60 air working dives and 8 mixed-gas working
dives in the last 18 months.
To qualify for the ADCI Mixed-Gas Diver certification card, an
applicant must have a minimum of how many logged
working dives?
A) 25 Air dives and 5 Mixed-Gas dives
B) 50 Air dives and 10 Mixed-Gas HeO₂ dives
C) 100 Air dives and 25 Mixed-Gas dives
D) 50 Air dives and 25 Mixed-Gas dives
Answer: B
Rationale: ADCI requires documented proof of 50 Air working
dives and 10 Mixed-Gas HeO₂ dives, plus at least 100 Air and
, Page 4 of 137
50 Mixed-Gas field days. These dives must be signed off by a
supervisor and performed within a 24-month period immediately
prior to certification .
Question 3
Scenario: A diving school is designing a curriculum for
commercial diver training. The school wants to ensure its program
meets ADCI requirements for graduate certification eligibility.
The minimum hours of formal instruction required for
commercial diver training to qualify for ADCI certification is:
A) 300 hours
B) 500 hours
C) 625 hours
D) 800 hours
Answer: C
