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31. When an erosive material catches fire, it should not be put out with water cannon.
Answer：Y
Previous question: 30. Once inflammable gas causes a fire disaster, it should be put out with water in good time.
Next question: 32. Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
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
- Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
- What is the meaning of this sign?
- When driving in rain and encountering pedestrians with umbrellas or wearing raincoats, what should be done by motor vehicle drivers in order to yield?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?
- Which of the following is an inflammable solid material?
- What is the meaning of this sign?
- 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?
- How to reduce speed or stop when driving on a road covered with snow and ice?
- What is the meaning of this sign?
- When following other vehicles on the uphill section of a mountain road, what should the driver do if the vehicle in front stops?
- When driving in thick or extremely thick fog, what should the driver do due to the low visibility in such weather?
- How should lamps be used when a motor vehicle meets an oncoming bicycle on a narrow road or a narrow bridge at night?
- What is the meaning of this sign?