PADI Open Water Diver 4

Question 1

What should you do if you experience a muscle cramp in your leg while diving?

Accepted Answer

Stop, relax, stretch the cramped muscle, then continue or ascend

Answer

Stopping and stretching the cramped muscle while relaxing typically resolves leg cramps; you may then continue the dive or ascend as needed.

Question 2

Which of the following is a symptom of decompression sickness (DCS)?

Accepted Answer

Joint pain, dizziness, or numbness after a dive

Answer

DCS symptoms include joint pain ('the bends'), dizziness, numbness, weakness, and rashes appearing after surfacing from a dive.

Question 3

What is the first aid treatment for a diver suspected of having decompression sickness?

Accepted Answer

Administer 100% oxygen and seek emergency medical care

Answer

Administering 100% oxygen and getting the diver to emergency medical care (including hyperbaric treatment) is the correct first aid for DCS.

Question 4

What does a 'kelp bed' environment require divers to be especially careful about?

Accepted Answer

Entanglement in the plant growth

Answer

Kelp beds pose an entanglement risk; divers should move slowly, keep equipment streamlined, and know how to calmly free themselves if tangled.

Question 5

Which factor most affects how long a scuba tank will last during a dive?

Accepted Answer

Depth and breathing rate

Answer

Depth increases air consumption because each breath at depth uses more compressed air, and a higher breathing rate further depletes the tank faster.

PADI - Professional Association of Diving Instructors Practice Test