33. 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.

Answer：Y

Previous question: 32. Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.

Next question: 34. When a gas tanker is leaking heavily, which of the following measures is wrong?

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?
What is the meaning of this sign?
When rescuing the persons who are losing blood, it is necessary to ______ first.
What should motor vehicle drivers do when parking temporarily on a rainy day?
What should the driver do when he/she encounters an oncoming ambulance in the same lane?
What is the meaning of this sign?
Matches, sulfur and red phosphorus are _________.
What is the meaning of this sign?
What is the meaning of this sign?
When driving on a long downhill road, which is the best way to control driving speed?
What is the meaning of this sign?
What is the meaning of this sign?
What is the main impact of foggy weather on safe driving?
What should be done by the driver who intends to overtake but finds that the vehicle in front is also overtaking?
When driving on road sections where safe sight distance is affected, such as the top of a ramp, what should drivers do to ensure safety?
What is the meaning of this sign?