SDI Certification Exam Review
Questions and Answers
What should you do if you suddenly feel sick and develop a headache during a scuba dive? -
ANSWERS-Abort dive and controlled ascent. Breathe fresh air or oxygen
As pressure increases - ANSWERS-Volume decreases
What is the main purpose of a snorkel? - ANSWERS-Allows you to conserve air from your scuba
cylinder at long intervals of time at the surface
How do you know if your mask fits correctly? - ANSWERS-Will tighten to your face and won't fall
off via suction through your nose
Name one audible and one visual rescue signal device - ANSWERS-Whistle/horn
Bright-colored lift bag
Name two basic fin designs - ANSWERS-Full-foot and open-heel
What is the main difference between a wet suit and a dry suit? - ANSWERS-Dry suit is designed
with an integrated inflation system to keep body completely out of contact with water. Dry suits
keep divers completely dry for use in cold water (below 50 degrees)
What extra attire can provide warmth? - ANSWERS-Hood, hooded vests, boots, gloves, caps
List the four functions of a dive computer - ANSWERS-Depth, dive time, ascent rate, surface
interval time
Questions and Answers
What should you do if you suddenly feel sick and develop a headache during a scuba dive? -
ANSWERS-Abort dive and controlled ascent. Breathe fresh air or oxygen
As pressure increases - ANSWERS-Volume decreases
What is the main purpose of a snorkel? - ANSWERS-Allows you to conserve air from your scuba
cylinder at long intervals of time at the surface
How do you know if your mask fits correctly? - ANSWERS-Will tighten to your face and won't fall
off via suction through your nose
Name one audible and one visual rescue signal device - ANSWERS-Whistle/horn
Bright-colored lift bag
Name two basic fin designs - ANSWERS-Full-foot and open-heel
What is the main difference between a wet suit and a dry suit? - ANSWERS-Dry suit is designed
with an integrated inflation system to keep body completely out of contact with water. Dry suits
keep divers completely dry for use in cold water (below 50 degrees)
What extra attire can provide warmth? - ANSWERS-Hood, hooded vests, boots, gloves, caps
List the four functions of a dive computer - ANSWERS-Depth, dive time, ascent rate, surface
interval time
