Unlimited Instructor-level dive theory practice for the IDC and Instructor Exam — physics, physiology, equipment, the RDP/eRDPml, and general skills & environment. Sit IE-style mock exams as often as you like.
The Instructor Exam dive theory test covers five topic areas at professional depth. Our engine lets instructor candidates drill each area to mastery and then sit IE-style mock exams with fresh questions every time — the fastest way to walk into the IE with no surprises.
New to this exam? Read How to Pass the Instructor Exam (IE).
A taste of the style and difficulty. In the app you get a fresh set every time.
At 30 metres/100 feet in seawater, the ambient pressure is approximately:
Why: 1 bar/ata from the atmosphere plus about 3 bar/ata from 30 metres of seawater gives roughly 4 bar/ata total.
A student diver begins showing signs of nitrogen narcosis at depth. The most effective response is to:
Why: Narcosis eases as ambient pressure drops, so ascending to a shallower depth is the correct and immediate response.
Five topic areas — physics, physiology, equipment, the RDP/eRDPml, and general skills and dive environment — typically requiring 75% per section. Our practice covers all five with unlimited fresh questions.
Yes. Instructor candidates use it throughout the IDC to drill weak topics and sit IE-style mock exams as often as they want, in whichever language they think in.
No — they're original, instructor-level practice questions written to match the real exam's topics and rigor, so you build genuine mastery rather than memorizing a specific paper.
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