PADI Diving Theory & Safety 2

Question 1

A diver ascends too quickly from 30 meters. Which condition is MOST likely to result?

Accepted Answer

Decompression sickness

Answer

Nitrogen narcosis

Answer

Oxygen toxicity

Answer

Carbon dioxide buildup

Question 2

What is the purpose of the 'safety stop' recommended by PADI at 5 meters for 3 minutes?

Accepted Answer

To reduce the risk of decompression sickness

Answer

To allow equalization of the ears

Answer

To conserve remaining air supply

Answer

To signal surface support of your ascent

Question 3

Boyle's Law states that at a constant temperature, the volume of a gas is:

Accepted Answer

Inversely proportional to absolute pressure

Answer

Directly proportional to absolute temperature

Answer

Directly proportional to absolute pressure

Answer

Independent of pressure changes

Question 4

Which gas law explains why a diver's lungs could rupture if they hold their breath during ascent?

Accepted Answer

Boyle's Law

Answer

Henry's Law

Answer

Dalton's Law

Answer

Charles's Law

Question 5

What does a dive computer's 'no-decompression limit' (NDL) indicate?

Accepted Answer

The maximum time at depth before mandatory decompression stops are required

Answer

The maximum depth you can safely reach

Answer

The time remaining before your tank runs out of air

Answer

The minimum surface interval before your next dive

Question 6

A diver experiences pain in their joints and muscles after a dive. This symptom is associated with which condition?

Accepted Answer

Decompression sickness (Type II)

Answer

Arterial gas embolism

Answer

Nitrogen narcosis

Answer

Oxygen toxicity

Question 7

According to PADI standards, what is the maximum recommended ascent rate?

Accepted Answer

9 meters per minute

Answer

18 meters per minute

Answer

30 meters per minute

Answer

6 meters per minute