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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.
2025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 2025 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
- What is the meaning of this sign?
- Which of the following measures is correct for rescuing a person sustaining full-body burns?
- When a gas tanker is leaking heavily, which of the following measures is wrong?
- The first-aid measure to rescue a poisoned person is to _______.
- What needs attention when a motor vehicle drives on a road covered with ice and snow?
- What is the meaning of this sign?
- What should motor vehicle drivers do when parking temporarily on a rainy day?
- What is the meaning of this sign?
- Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
- When rescuing a wounded person in coma, it is necessary to take warm-keeping measures to prevent heat loss.
- When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
- When there is no bandage for rescuing a wounded person, which of the following measures is wrong?
- What is the meaning of this sign?
- When encountering a vehicle in front ascending on a mountainous road covered with ice and snow, what should the motor vehicle driver do?
- In emergencies, people¡¯s life safety should always be put in the first place.
- What is the meaning of this sign?