PADI Deep Diving Techniques & Planning 2

Question 1

When planning a deep dive to 100 feet, which factor most critically determines your maximum bottom time?

Accepted Answer

No-decompression limit (NDL)

Answer

The no-decompression limit (NDL) defines the maximum time you can spend at depth without requiring mandatory decompression stops.

Question 2

What is the recommended maximum ascent rate during a deep dive?

Accepted Answer

30 feet per minute

Answer

PADI recommends an ascent rate of no faster than 30 feet (9 meters) per minute to allow dissolved gases to safely off-gas.

Question 3

A diver at 100 feet suddenly feels task-loaded and anxious. What is the MOST likely contributing factor?

Accepted Answer

Nitrogen narcosis

Answer

Nitrogen narcosis commonly causes anxiety, impaired judgment, and task-loading difficulty at depths around 100 feet and beyond.

Question 4

During pre-dive planning for a deep dive, what rule governs how you divide your air supply?

Accepted Answer

The rule of thirds

Answer

The rule of thirds allocates one-third of gas for the outward journey, one-third for return, and one-third as an emergency reserve.

Question 5

Which condition is a contraindication for deep diving and requires medical evaluation before participation?

Accepted Answer

A history of spontaneous pneumothorax

Answer

A history of spontaneous pneumothorax indicates a risk of lung over-expansion injury under pressure changes, requiring physician clearance.

(PADI) Certified Professional Association of Diving Instructors Diver Practice Test