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

When rescuing the injured, it is necessary to ________.
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.
When there is bleeding at the bone fracture of a wounded person, the first thing to do is to keep it in position before stopping the bleeding and dress the wound.
When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
What is the meaning of this sign?
When a motor vehicle encounters a burning phenomenon, it should leave the vehicle quickly so as not to cause injury or asphyxia to the respiratory tract.
Rescue personnel should check the breath of the unconscious person before applying any other emergency treatment.
When rescuing a wounded person who has been poisoned by toxic gas, the first measure is to send him to a place where air is fresh so that he will not continue to be poisoned.
When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
When a wounded person suffering burns is thirsty, he should only drink plain boiled water.
When a gas tanker is leaking heavily, which of the following measures is wrong?
The article that cannot be used to stop bleeding by dressing is _________.
The first-aid measure to rescue a poisoned person is to _______.
When a motor vehicle encounters an accident, the driver should pay attention to whether there is fuel leakage, pipeline rupture, so as avoid accidents.
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.
Which of the following method is correct to rescue an unconscious person?