EXAM LATEST 2025-2026
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What are the four components of the Diver Diamond?
A. Knowledge, Skills, Equipment, Experience
B. Experience, Equipment, Commitment, Acquisition
C. Skills, Equipment, Experience, Time
D. Equipment, Experience, Travel, Retail - A. Knowledge, Skills, Equipment, Experience
Which of the following is a benefit of affiliating with a Dive Center/Resort?
A. Access to marketing and student acquisition resources
B. Access to equipment and training resources
C. Interactions with more-experienced instructors
D. All answers are correct - D. All answers are correct
Local dive centers usually:
A. Focus on traveling divers from other destinations
B. Focus on training and developing a community of local divers
C. Have easy access to exciting open water dive sites
,D. Only provide continuing education programs - B. Focus on training and developing a
community of local divers
Resorts usually:
A. Have no access to open water dive sites
B. Focus on taking destination divers to exciting dive sites
C. Focus on developing a local dive community
D. Only provide entry-level training programs - B. Focus on taking destination divers to
exciting dive sites
For every meter of depth in freshwater, pressure changes by:
A. 0.098 bar
B. 0.100 bar
C. 0.013 bar
D. 1.03 bar - A. 0.098
Which physical law states: "If temperature remains constant, the pressure and volume
of any gas are inversely related"?
A. Boyle
B. Dalton
C. Henry
D. Archimedes - A. Boyle
The absolute pressure at a depth of 50 meters in salt water is:
A. 5.000 bar
B. 5.012 bar
C. 5.901 bar
D. 6.000 bar - D. 6.000 bar
Breathing gas consumption:
A. Decreases as depth increases
B. Increases as depth increases
C. Varies inversely with depth
D. Remains the same as depth increases - B. Increases as depth increases
What would be the surface air consumption rate (SAC) of a diver with a 200bar, 10 liter
cylinder who uses 50bar in 10 minutes at a depth of 10 meters in the ocean?
A. 10 liters / minute
B. 25 liters / minute
C. 35 liters / minute
D. 50 liters / minute - B. 25 liters / minute
A diver and his / her equipment weigh 87 kg when neutrally buoyant in saltwater. To be
neutrally buoyant for freshwater diving with the same equipment, he /she has to:
A. Use the same weight
B. All answers are correct
,C. Add weight
D. Remove weight - D. Remove weight
If 2 liters of air are needed in your buoyancy compensator to maintain neutral buoyancy
at 10m in the ocean, what will happen to your buoyancy if you ascend 3 m without
deflating:
A. There will be no change in buoyancy
B. You willstay neutral no matter if you ascend or descend
C. Your negative buoyancy will increase
D. Your positive buoyancy will increase - D. Your positive buoyancy will increase
Assuming a maximum partial pressure limitation of 1.4 bar, the maximum MOD for a
40% nitrox mixture in the ocean is:
A. 40 meters
B. 25 meters
C. 35 meters
D. 20 meters - B. 25 meters
The ocean depth at which the partial pressure of oxygen in air equals 1.6 bar is _____
meters assuming O2 = 21%.
A. 55
B. 85
C. 70
D. 66 - D. 66
Assuming a maximum partial pressure limitation of 1.4 bar, the maximum depth for a
32% nitrox mixture is ____ of seawater.
A. 43.7 m
B. 66 m
C. 33.7 m
D. 20 m - C. 33.7
The cardiovascular system consists of these three major components:
A. Right Atrium, left Atrium and Arteries only
B. Sinuses and Lungs only
C. Alveoli, Veins and lungs only
D. Heart (pump), Blood (transport medium) , Blood vessels (plumbing) - D. Heart
(pump), Blood (transport medium) , Blood vessels (plumbing)
A lung rupture can occur with over-pressurization in water as shallow as:
A. 5.0m
B. 1.2m
C. 3.5m
D. 4.0m - B. 1.2m
Which of the following statements concerning heat stroke is not true?
, A. The skin is hot
B. Perspiration is profuse
C. Heat stroke is an extremely serious condition
D. The pulse is rapid - B. Perspiration is profuse
A physiological condition called a squeeze occurs when:
A. The pressure on the inside of an air space is increasing to equalize with the external
pressure
B. None of the answers are correct
C. The pressure on the inside of an air space is greater than the external pressure
D. The pressure on the outside of an closed air space is greater than the internal
pressure - D. The pressure on the outside of an closed air space is greater than the
internal pressure
Permanent hearing loss, vertigo and ringing in the ear are most likely to be the result of
a ruptured:
A. Eardrum
B. Semicircular Canal
C. Eustachian Tube
D. Round and/or Oval Window - D. Round and/or Oval Window
The primary symptom of ear squeeze in its initial phase is:
A. Joint and limb pain
B. A pressure that will progress to severe pain if equalization is not completed
C. Rapid, shallow, inefficient breathing
D. A pulling sensation in the chest - B. A pressure that will progress to severe pain if
equalization is not completed
There are several lung overexpansion injuries that you should be aware of so that you
can avoid them while diving. These are:
A. Decompression Sickness, Arterial Gas Embolism and rupture of the Oval Window
B. Hypothermia, Hypoxia, Hyperoxia
C. Decompression Sickness, Barotrauma
D. Air Embolism, Mediastinal Emphysema, Subcutaneous Emphysema, Pneumothorax
- D. Air Embolism, Mediastinal Emphysema, Subcutaneous Emphysema,
Pneumothorax
If you have difficulty equalizing pressure in your ears/sinuses while descending, you
should:
A. Ascend until the pressure is relieved and then attempt equalization
B. Ascend 2 meters and force equalization
C. Stop and wait until the discomfort subsides
D. Return to the surface and re-initiate the descent - A. Ascend until the pressure is
relieved and then attempt equalization