Practice questions, level by level
In short
These practice questions come straight from the Octo app: one question per lesson, with the answer and its explanation. Tap an answer to check yourself. They are original questions written for the app, not an agency’s exam, and the app has 372 of them plus a practice exam for each level.
Pick your level below and answer one question per lesson before you open the explanation. A level takes about five minutes, with no sign-up. The questions you miss are the ones to review before your exam. For a plan, see how to study for the Open Water exam or the divemaster theory study plan.
- 12 Rescue Diver practice questionsFree Rescue Diver theory practice questions with answers and explanations: stress and panic, rescues at the surface and underwater, first aid principles.
- 14 Advanced Open Water practice questionsFree Advanced Open Water theory practice questions with answers: deep diving, narcosis, navigation, night, wreck, drift diving, nitrox and dry suit.
- 16 Divemaster dive theory practice questionsFree Divemaster dive theory practice questions with worked answers: gas laws, buoyancy, physiology, decompression theory, equipment and leading divers.
- 20 Open Water Diver practice questionsFree Open Water Diver theory practice questions with answers and explanations: gear, pressure, equalizing, buoyancy, air, safety stop and planning.
