危険物乙4コンプリートマスター解説付

株式会社ビーク

In-app purchases

About this app

This is a learning app specifically designed for the Class B, Category 4 Hazardous Materials Handler exam.

It includes detailed explanations for all 2,000 multiple-choice questions. Not only does it explain why the correct answer is correct, but it also carefully explains why the incorrect options are wrong, for each and every question.

[Contents Included]
- Laws and Regulations: 800 questions (10 fields including designated quantities, manufacturing facilities, and safety systems)
- Basic Physics and Basic Chemistry: 600 questions (10 fields including combustion, fire extinguishing, and static electricity)
- Properties of Hazardous Materials and Methods of Fire Prevention and Extinguishing: 600 questions (10 fields including various petroleum products and animal and vegetable oils)
- Text-Based Learning: 30 lessons (detailed explanations at the level of a reference book)
- Important Charts and Diagrams: 60 sheets (classification tables, property comparisons, flowcharts, etc.)

[Learning Functions]
- Review based on the forgetting curve (SM-2 algorithm)
- Mock Exam (35 questions, 135-minute format, same as the actual exam)
- Weakness Analysis (visualization of correct answer rates by subject and field)
- Question and Answer Mode (learn quickly in spare time)
- Bookmark Function (save important questions)
- Learning Record and Automatic Recording of Consecutive Learning Days
- Dark Mode Support
- Text-to-Speech (TTS) Function

[About the Exam]
The Class B Hazardous Materials Handler (Category 4) is a national qualification for handling flammable liquids such as gasoline, kerosene, diesel fuel, and heavy oil. It is required in a wide range of industries, including gas stations, chemical plants, and warehousing, and is a popular qualification with over 200,000 test-takers annually. The exam consists of 3 subjects and 35 questions; a score of 60% or higher in each subject is required to pass.

[Free Trial]
All features are free for 7 days after installation. After the free period, you can answer up to 20 questions per day.

[Premium Plan]
- Monthly Plan: Unlimited access to all features. You can cancel anytime.
- One-time Purchase Plan: Permanent use with a single payment.

[About Subscriptions]
- Monthly plans automatically renew.
- Your account will be charged at confirmation of purchase.
- Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the end of the current period.
- Your account will be charged for renewal within 24 hours prior to the end of the current period.

- Subscriptions can be managed and canceled from your account settings after purchase.
- If you purchase a subscription during the free trial period, any unused portion of the free trial will be forfeited.

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Terms of Service: https://b19.co.jp/terms

What’s new

・正解を選んだのに不正解と表示されることがある問題を修正
・安定性の改善