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30. Once inflammable gas causes a fire disaster, it should be put out with water in good time.
Answer：N
Previous question: 29. Which of the following is an inflammable solid material?
Next question: 31. When an erosive material catches fire, it should not be put out with water cannon.
2026年摩托车科目四英文版题库共345题，你可以免费查看前50题，完整版题库请添加微信购买：
The English version of the 2026 motorcycle subject 4 question bank has a total of 345 questions. You can view the top 50 questions for free. Please add WeChat to purchase the complete version of the question bank.
科目四试题
- When a wounded person is unable to get off the vehicle by himself, he should be removed from the vehicle so as to avoid a secondary injury.
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When there is bleeding at the bone fracture of a wounded person, the first thing to do is to fix the wounded part in position, then stop the bleeding and dress the wound.
- When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
- When the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the most frequent problem for driving on a muddy road?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What needs attention when a motor vehicle drives on a road covered with ice and snow?
- When two vehicles approach each other on a foggy day, what is the best method of safe driving?
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?