DIVEMASTER FINAL EXAM A
QUESTIONS AND ANSWERS 2026
1. What is the primary role of a PADI Divemaster when assisting with a student diver in
training?
A. To act as the primary instructor for the course
B. To handle logistics and provide additional supervision
C. To evaluate the students’ mastery of skills
D. To take over the class if the instructor is late
Answer: B
Conceptual Explanation: The Divemaster’s role is to support the instructor by handling
logistics and providing an extra set of eyes for supervision, but they do not replace the
instructor’s role in evaluation.
2. According to Boyle’s Law, if the pressure on a gas is tripled, what happens to the volume?
A. It decreases to one-third
B. It increases by three times
C. It remains the same
,D. It doubles
Answer: A
Conceptual Explanation: Boyle’s Law states that volume is inversely proportional to
pressure. Therefore, tripling the pressure reduces the volume to one-third.
3. Which of the following describes the effect of refraction underwater?
A. Objects appear smaller and further away
B. Colors appear more vibrant
C. Objects appear larger and closer
D. Light rays travel faster than in air
Answer: C
Conceptual Explanation: Refraction, the bending of light as it passes from water to air in
the mask, causes objects to appear about 25% closer and larger.
4. If a diver is at 30 meters (99 feet) of seawater, what is the total ambient pressure?
A. 3 bar
B. 2 bar
C. 4 bar
D. 5 bar
Answer: C
, Conceptual Explanation: At 30 meters, there are 3 bar of water pressure plus 1 bar of
atmospheric pressure, totaling 4 bar.
5. Sound travels faster in water than in air because water is:
A. Colder
B. Less dense
C. More dense and elastic
D. More transparent
Answer: C
Conceptual Explanation: Sound travels about four times faster in water because water is
denser and has higher elasticity than air.
6. What is the partial pressure of oxygen (pO2) in air at a depth of 20 meters (66 feet)?
A. 0.63 bar
B. 0.42 bar
C. 0.21 bar
D. 0.84 bar
Answer: A
Conceptual Explanation: At 20 meters, ambient pressure is 3 bar. Air is 21% oxygen. 3
bar * 0.21 = 0.63 bar.
QUESTIONS AND ANSWERS 2026
1. What is the primary role of a PADI Divemaster when assisting with a student diver in
training?
A. To act as the primary instructor for the course
B. To handle logistics and provide additional supervision
C. To evaluate the students’ mastery of skills
D. To take over the class if the instructor is late
Answer: B
Conceptual Explanation: The Divemaster’s role is to support the instructor by handling
logistics and providing an extra set of eyes for supervision, but they do not replace the
instructor’s role in evaluation.
2. According to Boyle’s Law, if the pressure on a gas is tripled, what happens to the volume?
A. It decreases to one-third
B. It increases by three times
C. It remains the same
,D. It doubles
Answer: A
Conceptual Explanation: Boyle’s Law states that volume is inversely proportional to
pressure. Therefore, tripling the pressure reduces the volume to one-third.
3. Which of the following describes the effect of refraction underwater?
A. Objects appear smaller and further away
B. Colors appear more vibrant
C. Objects appear larger and closer
D. Light rays travel faster than in air
Answer: C
Conceptual Explanation: Refraction, the bending of light as it passes from water to air in
the mask, causes objects to appear about 25% closer and larger.
4. If a diver is at 30 meters (99 feet) of seawater, what is the total ambient pressure?
A. 3 bar
B. 2 bar
C. 4 bar
D. 5 bar
Answer: C
, Conceptual Explanation: At 30 meters, there are 3 bar of water pressure plus 1 bar of
atmospheric pressure, totaling 4 bar.
5. Sound travels faster in water than in air because water is:
A. Colder
B. Less dense
C. More dense and elastic
D. More transparent
Answer: C
Conceptual Explanation: Sound travels about four times faster in water because water is
denser and has higher elasticity than air.
6. What is the partial pressure of oxygen (pO2) in air at a depth of 20 meters (66 feet)?
A. 0.63 bar
B. 0.42 bar
C. 0.21 bar
D. 0.84 bar
Answer: A
Conceptual Explanation: At 20 meters, ambient pressure is 3 bar. Air is 21% oxygen. 3
bar * 0.21 = 0.63 bar.
