ADCI SURFACE SUPPLIED MIXED GAS DIVER CERTIFICATION
PRACTICE EXAM 2026 | ACCURATE REAL EXAM QUESTIONS
AND VERIFIED ANSWERS WITH RATIONALES | EXPERT
VERIFIED FOR GUARANTEED PASS |
LATEST UPDATE
SECTION 1: ADCI REGULATIONS, STANDARDS & CERTIFICATION (Questions 1–20)
Question 1
Which US government agencies specifically cite the ADCI International Consensus
Standards as the authoritative source for best practices in commercial diving?
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
Correct Answer: B) OSHA, the U.S. Coast Guard, and the U.S. Army Corps of
Engineers
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[reference:0]. Compliance with ADCI
standards is considered compliance with federal diving regulations for member
companies.
Question 2
What is the primary U.S. federal regulation that governs commercial diving
operations in general industry?
A) 46 CFR Part 197
B) 29 CFR 1910.401–440 (Subpart T – Commercial Diving Operations)
C) 33 CFR Part 147
D) 49 CFR Part 195
1
,Correct Answer: B) 29 CFR 1910.401–440 (Subpart T – Commercial Diving
Operations)
Rationale: OSHA's 29 CFR 1910.401–440 is the primary federal standard governing
commercial diving in general industry[reference:1]. 46 CFR Part 197 governs
commercial diving on vessels under U.S. Coast Guard jurisdiction. Mixed-gas
divers must be familiar with both regulatory frameworks[reference:2].
Question 3
What is the minimum number of formal instruction hours required for
commercial
diver training to qualify for ADCI certification?
A) 300 hours
B) 500 hours
C) 625 hours
D) 800 hours
Correct Answer: C) 625 hours
Rationale: ADCI requires that commercial diver training consist of at least
625 documented hours of formal instruction in subjects set forth in the
ANSI/ACDE-01-2015 standard[reference:3]. This minimum ensures
comprehensive
training in diving physics, physiology, equipment, procedures, and safety.
Question 4
How long are ADCI certification cards (except entry-level tender/diver) valid
before requiring renewal?
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Correct Answer: D) 5 years
Rationale: ADCI certification cards (except entry-level tender/diver) are valid
2
,for a period of 5 years[reference:4]. Certification must be renewed to
maintain active status and demonstrate continued competency.
Question 5
Under ADCI standards, how many field days as an air diver are required before
a diver can qualify for Mixed-Gas Diver certification?
A) 50 field days
B) 100 field days
C) 150 field days
D) 350 field days
Correct Answer: B) 100 field days
Rationale: ADCI requires a diver to have completed at least 100 field days as
an air diver before qualifying for Mixed-Gas Diver certification[reference:5].
These dives must be properly documented and verified by a supervisor.
Question 6
What three elements define skill levels under ADCI Consensus Standards?
A) Certification level, depth rating, and equipment familiarity
B) Knowledge, skills/proficiency, and physical qualifications
C) Training hours, logged dives, and employer recommendation
D) Experience, age, and medical clearance
Correct Answer: B) Knowledge, skills/proficiency, and physical qualifications
Rationale: ADCI Consensus Standards define skill levels through three elements:
(1) knowledge gained through formal training and experience; (2) skills/
proficiency in tools, equipment, and procedures; and (3) physical qualifications
meeting medical requirements[reference:6]. All three must be met for each
assigned task.
Question 7
What is the maximum allowable depth for surface-supplied air diving per ADCI
standards?
3
, A) 100 fsw
B) 130 fsw
C) 165 fsw
D) 200 fsw
Correct Answer: C) 165 fsw
Rationale: Per ADCI standards, the maximum allowable depth for surface-supplied
air diving is 165 fsw (50 msw)[reference:7]. Depths beyond this require mixed
gas to manage nitrogen narcosis and oxygen toxicity risks.
Question 8
What is the maximum allowable depth for SCUBA per ADCI standards?
A) 100 fsw
B) 130 fsw
C) 150 fsw
D) 165 fsw
Correct Answer: B) 130 fsw
Rationale: ADCI limits SCUBA operations to a maximum depth of 130
fsw[reference:8].
Commercial SCUBA operations are subject to more restrictive limits than
surface-supplied diving due to the absence of continuous gas supply and
communication.
Question 9
What must be present at the dive site for mixed-gas diving deeper than 130 fsw?
A) A hot water suit
B) A decompression chamber
C) A dive bell
D) A backup diver
Correct Answer: B) A decompression chamber
Rationale: For mixed-gas diving deeper than 130 fsw, a decompression chamber
4
PRACTICE EXAM 2026 | ACCURATE REAL EXAM QUESTIONS
AND VERIFIED ANSWERS WITH RATIONALES | EXPERT
VERIFIED FOR GUARANTEED PASS |
LATEST UPDATE
SECTION 1: ADCI REGULATIONS, STANDARDS & CERTIFICATION (Questions 1–20)
Question 1
Which US government agencies specifically cite the ADCI International Consensus
Standards as the authoritative source for best practices in commercial diving?
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
Correct Answer: B) OSHA, the U.S. Coast Guard, and the U.S. Army Corps of
Engineers
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[reference:0]. Compliance with ADCI
standards is considered compliance with federal diving regulations for member
companies.
Question 2
What is the primary U.S. federal regulation that governs commercial diving
operations in general industry?
A) 46 CFR Part 197
B) 29 CFR 1910.401–440 (Subpart T – Commercial Diving Operations)
C) 33 CFR Part 147
D) 49 CFR Part 195
1
,Correct Answer: B) 29 CFR 1910.401–440 (Subpart T – Commercial Diving
Operations)
Rationale: OSHA's 29 CFR 1910.401–440 is the primary federal standard governing
commercial diving in general industry[reference:1]. 46 CFR Part 197 governs
commercial diving on vessels under U.S. Coast Guard jurisdiction. Mixed-gas
divers must be familiar with both regulatory frameworks[reference:2].
Question 3
What is the minimum number of formal instruction hours required for
commercial
diver training to qualify for ADCI certification?
A) 300 hours
B) 500 hours
C) 625 hours
D) 800 hours
Correct Answer: C) 625 hours
Rationale: ADCI requires that commercial diver training consist of at least
625 documented hours of formal instruction in subjects set forth in the
ANSI/ACDE-01-2015 standard[reference:3]. This minimum ensures
comprehensive
training in diving physics, physiology, equipment, procedures, and safety.
Question 4
How long are ADCI certification cards (except entry-level tender/diver) valid
before requiring renewal?
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Correct Answer: D) 5 years
Rationale: ADCI certification cards (except entry-level tender/diver) are valid
2
,for a period of 5 years[reference:4]. Certification must be renewed to
maintain active status and demonstrate continued competency.
Question 5
Under ADCI standards, how many field days as an air diver are required before
a diver can qualify for Mixed-Gas Diver certification?
A) 50 field days
B) 100 field days
C) 150 field days
D) 350 field days
Correct Answer: B) 100 field days
Rationale: ADCI requires a diver to have completed at least 100 field days as
an air diver before qualifying for Mixed-Gas Diver certification[reference:5].
These dives must be properly documented and verified by a supervisor.
Question 6
What three elements define skill levels under ADCI Consensus Standards?
A) Certification level, depth rating, and equipment familiarity
B) Knowledge, skills/proficiency, and physical qualifications
C) Training hours, logged dives, and employer recommendation
D) Experience, age, and medical clearance
Correct Answer: B) Knowledge, skills/proficiency, and physical qualifications
Rationale: ADCI Consensus Standards define skill levels through three elements:
(1) knowledge gained through formal training and experience; (2) skills/
proficiency in tools, equipment, and procedures; and (3) physical qualifications
meeting medical requirements[reference:6]. All three must be met for each
assigned task.
Question 7
What is the maximum allowable depth for surface-supplied air diving per ADCI
standards?
3
, A) 100 fsw
B) 130 fsw
C) 165 fsw
D) 200 fsw
Correct Answer: C) 165 fsw
Rationale: Per ADCI standards, the maximum allowable depth for surface-supplied
air diving is 165 fsw (50 msw)[reference:7]. Depths beyond this require mixed
gas to manage nitrogen narcosis and oxygen toxicity risks.
Question 8
What is the maximum allowable depth for SCUBA per ADCI standards?
A) 100 fsw
B) 130 fsw
C) 150 fsw
D) 165 fsw
Correct Answer: B) 130 fsw
Rationale: ADCI limits SCUBA operations to a maximum depth of 130
fsw[reference:8].
Commercial SCUBA operations are subject to more restrictive limits than
surface-supplied diving due to the absence of continuous gas supply and
communication.
Question 9
What must be present at the dive site for mixed-gas diving deeper than 130 fsw?
A) A hot water suit
B) A decompression chamber
C) A dive bell
D) A backup diver
Correct Answer: B) A decompression chamber
Rationale: For mixed-gas diving deeper than 130 fsw, a decompression chamber
4
