PADI Scuba Diving Course Exam
Questions And Correct Answers (Verified
Answers) 2026/2027
Measurement for Pressure - CORRECT ANSWER -Bar or Atmosphere (ATA)
Depth / Pressure relationship under water - CORRECT ANSWER -0m/0ft = 1
bar/ata
10m/33ft = 2 bar/ata
20m/66ft = 3 bar/ata
30m/99ft = 4 bar/ata
40m/130ft is max rec dive limit
Water Volume - CORRECT ANSWER -Water does not compress so volume and
density do not change with depth
Air Volume/Density under water - CORRECT ANSWER -0m/0ft = 1 bar/ata = 1 air
volume = 1 air density
10m/33ft = 2 bar/ata = 1/2 air volume = 2 air density
20m/66ft = 3 bar/ata = 1/3 air volume = 3 air density
30m/99ft = 4 bar/ata = 1/4 air volume = 4 air density
Three major body air spaces - CORRECT ANSWER -ears, sinuses and mask
, Squeeze - CORRECT ANSWER -discomfort caused by pressure imbalance pulling
tissue into an air space during a descent
Equalization - CORRECT ANSWER -Adding air to air spaces to equalize the pressure
during a descent. You should equalize every meter or so as you descend.
Eardrum rupture - CORRECT ANSWER -Due to unequal pressures - can result in
Vertigo
Most Important Rule of Scuba Diving - CORRECT ANSWER -1. Breathe continuously
and never, ever hold your breath
2. Breathe slowly and deeply
3. Don't allow yourself to get winded or out of breath
4. Breathe Slowly to reduce anxiety
Breathing Slowly, Deeply and Continuously will help avoid Dead Air Space (throat
and regulator) and keep you calm and relaxed
Reverse Block - CORRECT ANSWER -Trapped air blocked during ascent
How Long Air in Tank lasts - CORRECT ANSWER -Depends on Depth:
0m/0ft = 1 bar/ata = 1 air volume
10m/33ft = 1/2 air volume = air lasts 1/2 time
20m/66ft = 1/3 air volume = air lasts 1/3 time
30m/99ft = 1/4 air volume = air lasts 1/4 time
Questions And Correct Answers (Verified
Answers) 2026/2027
Measurement for Pressure - CORRECT ANSWER -Bar or Atmosphere (ATA)
Depth / Pressure relationship under water - CORRECT ANSWER -0m/0ft = 1
bar/ata
10m/33ft = 2 bar/ata
20m/66ft = 3 bar/ata
30m/99ft = 4 bar/ata
40m/130ft is max rec dive limit
Water Volume - CORRECT ANSWER -Water does not compress so volume and
density do not change with depth
Air Volume/Density under water - CORRECT ANSWER -0m/0ft = 1 bar/ata = 1 air
volume = 1 air density
10m/33ft = 2 bar/ata = 1/2 air volume = 2 air density
20m/66ft = 3 bar/ata = 1/3 air volume = 3 air density
30m/99ft = 4 bar/ata = 1/4 air volume = 4 air density
Three major body air spaces - CORRECT ANSWER -ears, sinuses and mask
, Squeeze - CORRECT ANSWER -discomfort caused by pressure imbalance pulling
tissue into an air space during a descent
Equalization - CORRECT ANSWER -Adding air to air spaces to equalize the pressure
during a descent. You should equalize every meter or so as you descend.
Eardrum rupture - CORRECT ANSWER -Due to unequal pressures - can result in
Vertigo
Most Important Rule of Scuba Diving - CORRECT ANSWER -1. Breathe continuously
and never, ever hold your breath
2. Breathe slowly and deeply
3. Don't allow yourself to get winded or out of breath
4. Breathe Slowly to reduce anxiety
Breathing Slowly, Deeply and Continuously will help avoid Dead Air Space (throat
and regulator) and keep you calm and relaxed
Reverse Block - CORRECT ANSWER -Trapped air blocked during ascent
How Long Air in Tank lasts - CORRECT ANSWER -Depends on Depth:
0m/0ft = 1 bar/ata = 1 air volume
10m/33ft = 1/2 air volume = air lasts 1/2 time
20m/66ft = 1/3 air volume = air lasts 1/3 time
30m/99ft = 1/4 air volume = air lasts 1/4 time
