資格のキーホルダー · Inert-gas, halogenated and powder systems
Fire Equipment Officer Class 3 (A and B)
Regulations, basics and equipment, with every choice explained.
The Keyholder app includes original courses for Class A-3 (321 questions) and B-3 (285). Written mocks: 45 questions in 170 minutes (A) and 30 in 90 minutes (B). The practical part is practised separately as four-choice questions with drawn figures. A and B are separate purchases.
Before you start
- iOS app
- 資格のキーホルダー 宅建・簿記・FP・ITパスポート
- What it does
- One app with practice questions for 49 Japanese exams across 34 qualifications, each with its own study record and exam date.
- Content and features
- 49 exams, 34 qualifications / Explanations for every choice / Automatic review of missed questions / Daily target from your exam date
- Requirements
- iOS 16.0 or later
- Free access and purchases
- The first 10 questions of every qualification are free. Full questions and mock exams are a one-time in-app purchase per qualification, not a subscription.
- Before choosing
- Japanese-language exam practice. Not an official app of any exam body and no pass guarantee. Most questions download when you open a qualification; the first 10 work offline.
iOS facts checked: · Current App Store listing and purchase terms ↗
3-QUESTION CHECK
Try three questions.
Can you recall the reason?
After each answer, read the explanation for every choice in Japanese. No typing or sign-up is required.
QUESTION 1 / 3
1点に、大きさがどちらも50 Nの2つの力が、互いに120°の角度をなして働いている。この2力の合力の大きさとして、正しいものは次のうちどれか。
本ページの3問は Particles and Waves の独自問題（甲種第3類のコースから）です。消防試験研究センターが公表した問題の転載ではなく、同センターの公式ページでもありません。
CONTINUE IN THE APP
Continue in the Keyholder app.
Move from focused repetition to exam-format mock tests while keeping your study history.
This page and app are independent study aids, not official exam-authority products. Check current official information before taking an exam.