Scuba Diving Safety Diving 4

Question 1

What condition is caused by inhaling water, leading to impaired gas exchange in the lungs even after rescue from drowning?

Accepted Answer

Secondary drowning (delayed drowning)

Answer

Secondary drowning occurs hours after a near-drowning event when inhaled water causes inflammation and fluid buildup in the lungs.

Question 2

A diver at 60 feet runs low on air with a full ascent needed. They should breathe from their octopus regulator while their buddy:

Accepted Answer

Donates their primary second stage to the out-of-air diver while they share ascent

Answer

In an out-of-air emergency, the donor gives the primary reg (most familiar) to the victim and uses their own octopus during a controlled shared ascent.

Question 3

Which sign indicates a diver may be suffering from nitrogen narcosis at depth?

Accepted Answer

Irrational behavior, impaired judgment, and euphoria

Answer

Nitrogen narcosis ('rapture of the deep') impairs judgment similarly to alcohol intoxication, causing euphoria and poor decisions.

Question 4

What is the recommended minimum safety stop depth and duration for recreational dives deeper than 60 feet (18 m)?

Accepted Answer

15 feet (5 m) for 3 minutes

Answer

A safety stop at 15 feet for 3 minutes allows off-gassing of residual nitrogen and reduces DCS risk.

Question 5

A diver experiences tightness in the chest and difficulty breathing immediately after surfacing. This most likely indicates:

Accepted Answer

Pulmonary barotrauma or arterial gas embolism

Answer

Chest tightness and breathing difficulty after surfacing are classic signs of pulmonary overinflation injury and possible gas embolism requiring immediate oxygen and EMS.

Scuba Diving Practice Test

Scuba Diving Practice Test

Scuba Diving Safety Diving 4