PADI - Professional Association of Diving Instructors Dive Physiology and Health Questions and Answers

Question 1

A diver surfaces from a 30-meter (100-foot) dive and within 10 minutes complains of extreme fatigue, dizziness, and a tingling sensation in their arms.
Which of the following conditions is most likely responsible for these symptoms?

Accepted Answer

Decompression Sickness (DCS)

Answer

Nitrogen Narcosis

Answer

Oxygen Toxicity

Answer

Lung Overexpansion Injury

Question 2

Which of the following is the most effective and immediate field treatment for a diver exhibiting signs of Nitrogen Narcosis?

Accepted Answer

Ascending to a shallower depth.

Answer

Administering 100% oxygen at the surface.

Answer

Immediately performing a recompression dive.

Answer

Monitoring the diver at their current depth.

Question 3

Central Nervous System (CNS) Oxygen Toxicity is a risk primarily associated with diving with enriched air nitrox. Which acronym is commonly used to remember the signs and symptoms of CNS Oxygen Toxicity?

Accepted Answer

CONVENTID (Convulsions, Visual disturbances, Ear ringing, Nausea, Twitching, Irritability, Dizziness)

Answer

RICE (Rest, Ice, Compression, Elevation)

Answer

FAST (Face, Arms, Speech, Time)

Answer

SAMPLE (Signs/Symptoms, Allergies, Medications, Past history, Last meal, Events)

Question 4

A diver is having difficulty equalizing their ears during a rapid descent. To prevent a middle ear barotrauma, which is the most critical action to take?

Accepted Answer

Stop the descent, ascend slightly, and attempt to equalize again.

Answer

Forcefully attempt the Valsalva maneuver.

Answer

Continue the descent while wiggling the jaw.

Answer

Tilt the head to one side and swallow hard.

Question 5

What is the primary physiological reason a diver should never hold their breath while ascending on scuba?

Accepted Answer

To prevent a lung overexpansion injury.

Answer

To prevent carbon dioxide buildup.

Answer

To avoid nitrogen narcosis.

Answer

To conserve air in the cylinder.

Question 6

A diver on a deep air dive begins to experience impaired judgment, a false sense of security, and difficulty concentrating. This diver is most likely experiencing:

Accepted Answer

Nitrogen Narcosis

Answer

Hypothermia

Answer

Decompression Sickness

Answer

Oxygen Toxicity

A diver surfaces from a 30-meter (100-foot) dive and within 10 minutes complains of extreme fatigue, dizziness, and a tingling sensation in their arms.Which of the following conditions is most likely responsible for these symptoms?

A diver surfaces from a 30-meter (100-foot) dive and within 10 minutes complains of extreme fatigue, dizziness, and a tingling sensation in their arms.
Which of the following conditions is most likely responsible for these symptoms?