What are the hazardous flammable solids in Subject 4?
2 Answers
Hazardous flammable solids in Subject 4 include matches, etc. Below is an introduction to the knowledge related to the driver's license test: 1. Definition of driver's license: The full name of the driver's license is the motor vehicle driver's license, which is the certificate required by law for motor vehicle drivers. 2. Definition of Subject 1 test: Subject 1, also known as the Subject 1 theory test or driver theory test, is part of the motor vehicle driver's license assessment. According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses," the test content includes driving theory basics, road safety laws and regulations, local regulations, and other related knowledge. The test format is computer-based, with 100 questions, and a passing score of 90 or above.
I remember memorizing the part about flammable solids when preparing for the Subject 4 exam. The most frequently tested items include matches, sulfur, and red phosphorus, especially red phosphorus which is prone to spontaneous combustion—remember its difference from ordinary red phosphorus. Also, magnesium powder is dangerous; there was news about how difficult it was to extinguish a magnesium powder fire in a factory. Nitrocellulose requires special attention—it's used as bullet primer material, and this point is often tested. Others like activated carbon and aluminum powder also frequently appear on the list. When driving, if you encounter trucks carrying these hazardous materials, remember to keep a safe distance and avoid keeping matches in the car. For review, I recommend focusing on memorizing their flammable properties—this is more useful than just memorizing the names.
