PADI Wreck & Cave Diving Fundamentals 2

Question 1

In cave diving, the 'rule of thirds' for gas management means you should turn back when you have used how much of your starting gas supply?

Accepted Answer

One third

Answer

The rule of thirds reserves one third for the exit, one third for a buddy's emergency, and one third is never used.

Question 2

Which type of wreck penetration is considered the most hazardous due to reduced natural light and increased entanglement risk?

Accepted Answer

Penetration beyond the light zone

Answer

Penetrating beyond the light zone removes the diver's ability to see exits without artificial light and dramatically increases risk.

Question 3

What is the primary purpose of laying a continuous guideline during cave diving?

Accepted Answer

To provide a tactile reference back to the exit in zero visibility

Answer

A continuous guideline allows divers to navigate back to the exit by feel even in zero visibility caused by silt-out.

Question 4

Which certification level is required before a diver may penetrate a wreck beyond the light zone according to PADI standards?

Accepted Answer

PADI Wreck Diver Specialty

Answer

The PADI Wreck Diver Specialty teaches the skills and procedures needed for safe overhead environment penetration.

Question 5

During a wreck dive, silt is disturbed and visibility drops to near zero. What is the correct immediate action?

Accepted Answer

Stop all movement, stay calm, and follow the guideline to the exit

Answer

Stopping movement prevents further silting, and following the pre-laid guideline allows a controlled exit without visibility.

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