BSAC Sports Diver Theory Questions & Answers | 2025/2026 Edition | Verified Content with Guaranteed Pass | 100% Correct and A+ Graded

BSAC Sports Diver Theory Questions &
Answers | 2025/2026 Edition | Verified
Content with Guaranteed Pass | 100%
Correct and A+ Graded
Section 1: Introduction
This document includes a complete and verified set of theory questions and answers for the
BSAC Sports Diver certification, updated for the 2025/2026 season. It covers essential theory
topics such as dive planning, decompression procedures, buoyancy control, navigation,
rescue skills, and safe diving practices. Designed to mirror the BSAC exam format, this A+
graded guide guarantees a successful pass with reliable and correct information.

Section 2: Exam Questions and Answers
Question 1: What is the primary purpose of a dive plan?
A) To maximize dive duration
B) To ensure diver safety and coordination
C) To select dive equipment
D) To record marine life observations
Correct Answer: B) To ensure diver safety and coordination
Rationale: A dive plan outlines depth, time, gas management, and emergency procedures to
ensure safety and coordination. Maximizing duration (A), selecting equipment (C), and
recording marine life (D) are secondary or unrelated.

Question 2: What is the recommended maximum ascent rate for a BSAC Sports Diver?
A) 5 meters per minute
B) 10 meters per minute
C) 15 meters per minute
D) 20 meters per minute
Correct Answer: B) 10 meters per minute
Rationale: BSAC recommends a maximum ascent rate of 10 m/min to minimize
decompression sickness (DCS) risk. Slower (A) or faster rates (C, D) increase risks or are
impractical.

Question 3: What is the primary function of a buoyancy control device (BCD)?
A) To provide oxygen supply
B) To control diver buoyancy at depth and surface
C) To monitor dive time
D) To navigate underwater
Correct Answer: B) To control diver buoyancy at depth and surface
Rationale: A BCD adjusts buoyancy by adding or releasing air, ensuring neutral buoyancy at
depth and flotation on the surface. It does not supply oxygen (A), monitor time (C), or
navigate (D).

,Question 4: What is the minimum surface interval recommended between two dives to 20
meters?
A) 30 minutes
B) 1 hour
C) 2 hours
D) 4 hours
Correct Answer: B) 1 hour
Rationale: BSAC recommends at least a 1-hour surface interval to reduce residual nitrogen
and DCS risk. Shorter (A) or longer intervals (C, D) are less practical or overly conservative
for Sports Divers.

Question 5: Which gas law explains why a diver’s lungs expand during ascent?
A) Boyle’s Law
B) Charles’s Law
C) Dalton’s Law
D) Henry’s Law
Correct Answer: A) Boyle’s Law
Rationale: Boyle’s Law states that gas volume increases as pressure decreases during ascent,
potentially causing lung overexpansion if breath is held. Charles’s (B), Dalton’s (C), and
Henry’s (D) laws apply to temperature, partial pressures, and gas solubility.

Question 6: What should a diver do if they experience ear barotrauma during descent?
A) Ascend immediately
B) Equalize ears more frequently
C) Continue diving deeper
D) Remove mask to relieve pressure
Correct Answer: B) Equalize ears more frequently
Rationale: Ear barotrauma is managed by frequent equalization (e.g., Valsalva maneuver).
Ascending (A) may help but isn’t first-line. Continuing deeper (C) worsens injury. Mask
removal (D) is irrelevant.

Question 7: What is the no-decompression limit (NDL) for a dive to 18 meters using BSAC
tables?
A) 20 minutes
B) 37 minutes
C) 50 minutes
D) 60 minutes
Correct Answer: B) 37 minutes
Rationale: BSAC decompression tables indicate an NDL of approximately 37 minutes for 18
meters. Other times (A, C, D) are incorrect per BSAC standards.

Question 8: What is the primary purpose of a safety stop?
A) To conserve air supply
B) To reduce nitrogen off-gassing
C) To check equipment
D) To signal the dive boat
Correct Answer: B) To reduce nitrogen off-gassing
Rationale: A safety stop (typically 3–5 minutes at 5–6 meters) allows nitrogen to off-gas,
reducing DCS risk. It’s not for air (A), equipment (C), or signaling (D).

, Question 9: Which piece of equipment monitors air pressure in a diver’s cylinder?
A) Dive computer
B) Submersible pressure gauge (SPG)
C) Depth gauge
D) Regulator
Correct Answer: B) Submersible pressure gauge (SPG)
Rationale: The SPG monitors cylinder air pressure. Dive computers (A) track depth/time,
depth gauges (C) measure depth, and regulators (D) deliver air.

Question 10: What is the recommended buddy check acronym before a dive?
A) SAFE
B) BWRAF
C) DIVE
D) PLAN
Correct Answer: B) BWRAF
Rationale: BSAC uses BWRAF (Buoyancy, Weights, Releases, Air, Final check) for pre-
dive buddy checks. Other acronyms (A, C, D) are not standard.

Question 11: What is the primary risk of diving with a cold?
A) Dehydration
B) Ear barotrauma
C) Nitrogen narcosis
D) Oxygen toxicity
Correct Answer: B) Ear barotrauma
Rationale: A cold impairs ear equalization, increasing barotrauma risk. Dehydration (A),
narcosis (C), and toxicity (D) are unrelated to colds.

Question 12: How should a diver signal “out of air” to their buddy?
A) Thumbs-up gesture
B) Hand across throat
C) Pointing to regulator
D) Waving both hands
Correct Answer: B) Hand across throat
Rationale: The hand-across-throat signal indicates an out-of-air emergency. Thumbs-up (A)
means ascend, pointing to regulator (C) is non-standard, and waving (D) signals distress.

Question 13: What is the maximum depth for a BSAC Sports Diver?
A) 15 meters
B) 20 meters
C) 30 meters
D) 40 meters
Correct Answer: C) 30 meters
Rationale: BSAC Sports Divers are qualified to dive to 30 meters. Shallower (A, B) or
deeper (D) depths are for other certifications.

Question 14: What is the purpose of a decompression stop?
A) To conserve air
B) To prevent decompression sickness
C) To adjust buoyancy
D) To check navigation