What is the correct ratio of chest compressions to rescue breaths in CPR?

The current CPR ratio is 30 chest compressions followed by 2 rescue breaths, for both adult and child casualties.

Which search pattern is best for locating a small object over a large area?

The Jackstay search is the most systematic method for locating a small object across a large area. Expanding patterns are better suited to a rough last-known position or a large object.

When diving at altitude, which site should you dive first if visiting multiple altitude sites in one day?

Always dive the highest altitude site first. Diving lower altitudes first means you accumulate more nitrogen before reaching the higher, lower-pressure site, increasing decompression risk.

What is the best time of day to dive?

Slack high tide typically provides the best diving conditions: minimal current, better access over reefs, greater depth, and visibility is usually at its best before tidal flow disturbs sediment.

How long without diving before a refresher course is recommended?

Most diving organisations, including PADI, recommend a formal skills refresher after 6 months away from diving. The PADI Reactivate programme is designed specifically for this purpose.

What percentage of oxygen does an EAN 32 tank contain?

EAN 32 contains 32% oxygen. The number that follows EAN always indicates the oxygen percentage. The remaining 68% is nitrogen.

Skills and Environment Practice Questions — PADI IDC and Divemaster Theory

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Skills & Environment — Topics

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Tides Currents Waves & Rips Altitude Diving Search & Recovery / Night Diving Practice Questions

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Quiz 1 Quiz 2 Quiz 3

Altitude diving — exam essentials for the PADI IDC and Divemaster theory exams

Search and recovery and night diving — exam essentials for the PADI IDC and Divemaster theory exams

Skills & Environment — Quiz 1

CPR • Currents • Nitrox • Altitude • Tides • Navigation • Buoyancy • Marine environment

Skills & Environment — Quiz 2

Search & rescue • Nitrox • Currents • Altitude • Tides • Navigation • Signals • Marine environment

Skills & Environment — Quiz 3

Emergency response • Currents • Tides • Altitude • Navigation • Buoyancy • Equipment • Signals