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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.
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 should the driver do when he/she encounters an oncoming ambulance in the same lane?
- What is the meaning of this sign?
- When driving on a long downhill road, which is the best way to control driving speed?
- When a wounded person suffering bone fracture in the thigh, shank and spine, it is necessary to keep the fracture in position and refrain to move the wounded person.
- When rescuing the persons who are losing blood, it is necessary to ______ first.
- What should be done by the driver who intends to overtake but finds that the vehicle in front is also overtaking?
- When putting out a fire disaster that gives out erosive steam or poisonous gas, the firefighters should wear gas masks and other related protective articles and should operate from the windward side.
- Rescue personnel should check the breath of the unconscious person before applying any other emergency treatment.
- Which of the following is a bad habit when changing lanes?
- At the scene of a traffic accident, once there is a leakage of toxic and harmful substances, people must be evacuated at the first time and alarmed immediately.
- How should lamps be used when a motor vehicle meets an oncoming bicycle on a narrow road or a narrow bridge at night?
- Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
- Which lamp should be used when motor vehicles pass hrough an intersection at night where there is no traffic light signal?
- Which of the following measures is correct for rescuing a person sustaining full-body burns?
- When a motor vehicle stops temporarily in a rainy day,which lamp should be turned on?
- What is the meaning of this sign?