PADI Diving Theory & Safety 5

Question 1

What is the recommended action if a diver becomes negatively buoyant and begins sinking uncontrollably?

Accepted Answer

Drop the weight belt and inflate the BCD

Answer

Dropping the weight belt instantly reduces negative buoyancy and combined with BCD inflation allows rapid controlled ascent.

Question 2

How does water temperature affect a diver's gas consumption?

Accepted Answer

Cold water increases consumption due to shivering and greater effort

Answer

Cold water increases gas consumption because the body works harder to stay warm through shivering and heat production.

Question 3

A diver's mask floods during a dive. The correct technique to clear it is to:

Accepted Answer

Tilt the head back and exhale through the nose while pressing the top of the mask

Answer

Tilting the head back and exhaling through the nose creates positive pressure that expels water out through the bottom of the mask skirt.

Question 4

What is the PADI recommended maximum depth for recreational divers using air?

Accepted Answer

40 meters (130 feet)

Answer

PADI sets the recreational diving limit at 40 meters (130 feet) for qualified Open Water divers using air.

Question 5

Which hand signal indicates 'I am OK' when used underwater between buddy pairs?

Accepted Answer

A circle formed with thumb and index finger (OK sign)

Answer

The OK signal underwater is the circle formed with thumb and index finger; thumbs up means 'ascend' or 'end the dive'.

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