Four subjects, weighted 30/25/25/20
Diver Licence
The diving-operations block weighs the most.
Drill 116 questions across diving operations, air supply and ascent, hyperbaric disorders and regulations, judged on 40% per subject and a weighted 60% overall.
116 original questionsWeighted pass simulation20- and 40-question mocks
116 questions

Before you start
- iOS app
- 潜水士 一問一答 試験対策問題集
- What it does
- Practice the Diver licence written exam with scoring that follows the real subject weights.
- Content and features
- 116 original questions / Pass judged on 30/25/25/20 weighting / 20- and 40-question mock exams
- Requirements
- iOS 16.0 or later
- Free access and purchases
- A limited free trial is available. A one-time in-app purchase unlocks further questions and mock exams; see the app for current limits and price.
- Before choosing
- Japanese-language exam practice for the Diver licence exam. Independent of the exam authority, with no pass guarantee.
iOS facts checked: · Current App Store listing and purchase terms ↗
3-MINUTE CHECK
Try three questions.
Can you recall the reason?
The mini diagnostic is in Japanese, with a short explanation after each answer. No sign-up is required.
QUESTION 1 / 3
水深10メートルの海水中における絶対圧力に最も近い値はどれか(大気圧を約0.1MPaとする)。

CONTINUE IN THE APP
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Move from focused repetition to exam-format mock tests while keeping your study history.
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