Texas Diving Supervisor Licensing Exam –
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What is the primary responsibility of a diving supervisor?
A. Maintain the diving log
B. Ensure diver safety and compliance with procedures
C. Perform underwater inspections
D. Operate the support vessel
E. Schedule dives
B. Ensure diver safety and compliance with procedures
The diving supervisor is legally responsible for the safety of the diving team and
must ensure all operations follow regulations.
2. Before a dive, the supervisor must verify:
A. Weather forecast only
B. Diver certifications, equipment, and dive plan
C. Only the location of the dive
D. Water temperature only
E. Number of support staff
B. Diver certifications, equipment, and dive plan
It is the supervisor’s duty to ensure all divers are qualified and all equipment is
checked and dive plans are clear.
3. What is the recommended maximum working depth for a surface-supplied
diver using air?
A. 30 feet
B. 60 feet
C. 130 feet
D. 200 feet
,E. 300 feet
C. 130 feet
Air diving is generally limited to 130 feet to prevent nitrogen narcosis and oxygen
toxicity.
4. Which gas is primarily responsible for decompression sickness?
A. Oxygen
B. Helium
C. Nitrogen
D. Carbon dioxide
E. Hydrogen
C. Nitrogen
Nitrogen dissolves in body tissues under pressure and forms bubbles during rapid
ascent, causing decompression sickness.
5. How often must diving equipment be inspected according to Texas
regulations?
A. Monthly
B. Before every dive
C. Annually
D. Every six months
E. Only when damaged
B. Before every dive
Equipment must be inspected before each dive to ensure diver safety and prevent
malfunctions.
6. Which method is recommended for treating decompression sickness on-site?
A. Rapid ascent
B. Administer oxygen and contact medical support
C. Administer sedatives
D. Hydration only
E. Immediate return to the bottom
B. Administer oxygen and contact medical support
Oxygen helps reduce bubble size and tissue hypoxia; professional medical
treatment is required.
, 7. What is the maximum allowable bottom time for a diver at 100 feet using air?
A. 30 minutes
B. 50 minutes
C. 60 minutes
D. 80 minutes
E. 120 minutes
B. 50 minutes
Bottom times are determined by dive tables to minimize risk of decompression
sickness.
8. In surface-supplied diving, the diver’s lifeline is primarily used for:
A. Communication only
B. Securing tools
C. Safety and controlling ascent/descent
D. Measuring depth
E. Navigation
C. Safety and controlling ascent/descent
The lifeline ensures the diver can be controlled and recovered safely.
9. What should a supervisor do if weather conditions deteriorate suddenly
during a dive?
A. Continue the dive if safe for one more minute
B. Signal divers to abort and return to the surface
C. Wait for conditions to improve without action
D. Send divers to a deeper depth
E. Move the operation to a new site without notice
B. Signal divers to abort and return to the surface
Safety takes priority; diving must be suspended if conditions are unsafe.
10. Which form of communication is standard between surface and diver in a
surface-supplied dive?
A. Hand signals only
B. Written messages
C. Voice communication via helmet
D. Light signals
E. Radio signals only
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What is the primary responsibility of a diving supervisor?
A. Maintain the diving log
B. Ensure diver safety and compliance with procedures
C. Perform underwater inspections
D. Operate the support vessel
E. Schedule dives
B. Ensure diver safety and compliance with procedures
The diving supervisor is legally responsible for the safety of the diving team and
must ensure all operations follow regulations.
2. Before a dive, the supervisor must verify:
A. Weather forecast only
B. Diver certifications, equipment, and dive plan
C. Only the location of the dive
D. Water temperature only
E. Number of support staff
B. Diver certifications, equipment, and dive plan
It is the supervisor’s duty to ensure all divers are qualified and all equipment is
checked and dive plans are clear.
3. What is the recommended maximum working depth for a surface-supplied
diver using air?
A. 30 feet
B. 60 feet
C. 130 feet
D. 200 feet
,E. 300 feet
C. 130 feet
Air diving is generally limited to 130 feet to prevent nitrogen narcosis and oxygen
toxicity.
4. Which gas is primarily responsible for decompression sickness?
A. Oxygen
B. Helium
C. Nitrogen
D. Carbon dioxide
E. Hydrogen
C. Nitrogen
Nitrogen dissolves in body tissues under pressure and forms bubbles during rapid
ascent, causing decompression sickness.
5. How often must diving equipment be inspected according to Texas
regulations?
A. Monthly
B. Before every dive
C. Annually
D. Every six months
E. Only when damaged
B. Before every dive
Equipment must be inspected before each dive to ensure diver safety and prevent
malfunctions.
6. Which method is recommended for treating decompression sickness on-site?
A. Rapid ascent
B. Administer oxygen and contact medical support
C. Administer sedatives
D. Hydration only
E. Immediate return to the bottom
B. Administer oxygen and contact medical support
Oxygen helps reduce bubble size and tissue hypoxia; professional medical
treatment is required.
, 7. What is the maximum allowable bottom time for a diver at 100 feet using air?
A. 30 minutes
B. 50 minutes
C. 60 minutes
D. 80 minutes
E. 120 minutes
B. 50 minutes
Bottom times are determined by dive tables to minimize risk of decompression
sickness.
8. In surface-supplied diving, the diver’s lifeline is primarily used for:
A. Communication only
B. Securing tools
C. Safety and controlling ascent/descent
D. Measuring depth
E. Navigation
C. Safety and controlling ascent/descent
The lifeline ensures the diver can be controlled and recovered safely.
9. What should a supervisor do if weather conditions deteriorate suddenly
during a dive?
A. Continue the dive if safe for one more minute
B. Signal divers to abort and return to the surface
C. Wait for conditions to improve without action
D. Send divers to a deeper depth
E. Move the operation to a new site without notice
B. Signal divers to abort and return to the surface
Safety takes priority; diving must be suspended if conditions are unsafe.
10. Which form of communication is standard between surface and diver in a
surface-supplied dive?
A. Hand signals only
B. Written messages
C. Voice communication via helmet
D. Light signals
E. Radio signals only
