危険物乙４ 一問一答
Android app by 株式会社yuth. Education · 株式会社yuth
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- Free to download
- In-app purchases
- Not listed in captured metadata
- Version
- 5.0.0
- Listing last refreshed
- 2026-09-15
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Store description excerpt
App for preparing for the Class B Class 4 Hazardous Materials Operator Examination. Ranked #1 in the Otsu 4 learning app on iOS! A large volume with a total of over 400 questions! You can pass with just this app! ? Many achievements! ◎Cumulatively over 75,000 downloads on iOS! The cumulative total of the series has exceeded 400,000 downloads! ! The app that received overwhelming support among Otsu 4 learning apps is now available on Android! ! ◎Many successful results using the app! ◎The actual exam for Hazardous Materials Handler Otsu 4 has five multiple-choice questions, but by breaking it down into a question-and-answer format, you can learn more precisely and in detail! ◎One question and one answer, perfect for short study periods such as during free time. ◎All questions come with detailed explanations, so you can study without the textbook. ◎You can memorize questions that are easy to get wrong and focus on studying questions that you are weak at, so you can study efficiently. [What is a hazardous materials handler] Hazardous materials handler is a national qualification required to handle substances (dangerous materials) that have a high risk of causing fire as specified in the Fire Service Act. This qualification is divided into "Class A", "Class Otsu", and "Class C", and "Class Otsu" is further divided into categories 1 to 6. Among them, "Dangerous Goods Handler Class 4 (commonly known as Hazardous Materials Otsu 4)" includes commonly handled kerosene, gasoline, etc., and it is said that about 80% of all dangerous materials are included in this Hazardous Materials Handler Class 4. For this reason, it is the most in-demand qualification among hazardous materials handlers, and is said to be an advantageous qualification for part-time work at gas stations, employment, and career changes. This app is created in a question-and-answer format, dividing the questions into three areas: ``Laws and Regulations Regarding Hazardous Materials,'' ``Basic Physics and Chemistry,'' and ``The Properties of Hazardous Materials and Their Fire Prevention and Extinguishing Methods,'' in accordance with the question format of the actual Hazardous Materials Engineer Otsu 4 exam. Although Dangerous Goods Handler Otsu 4 is a national qualification, there are no restrictions on eligibility to take the exam, and the youngest person to pass is a second-year elementary school student, so it can be said that it is a national qualification that is relatively easy to pass if you have sufficient memorization skills. Also, depending on the venue, it is held more than 10 times a year, making it a very easy qualification to take. In this app, we research and analyze past exam questions for Dangerous Goods Handler Otsu 4, carefully select questions, and implement a memorization mode and extraction function for weak questions to help you memorize more efficiently.It is designed to help you get closer to passing the exam in the shortest possible time. [Advantages of obtain
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