What are the hazardous flammable solids in Subject 4?
3 Answers
Hazardous flammable solids in Subject 4 include matches, etc. Below is an introduction to the knowledge about 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, also known as "driver's license," which is the certificate required by law for motor vehicle drivers to apply for. 2. Definition of Subject 1 test: Subject 1, also known as 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 score of 90 or above is required to pass.
In the subject four content I learned while getting my driver's license, hazardous flammable solids mainly refer to some common solid items in daily life that are prone to combustion. For example, sulfur, commonly found in gunpowder or agricultural products, becomes extremely dangerous when exposed to heat sources; matches are self-explanatory, as they can ignite with just a touch from a lighter; rosin, used in musical instruments or glue, can catch fire with just a bit of friction; and dry phosphorus, often found in chemicals, can spontaneously combust when exposed to sunlight. These are key points in the driving test because if the cargo compartment is hot or experiences friction during transportation or loading, it can lead to a fire. Drivers must know to avoid them. I remember the mock test included questions on safe storage, such as maintaining ventilation and isolating heat sources, otherwise the consequences could be severe. When driving normally, don't casually leave these items in the car, as even a small spark could lead to a tragedy.
In the subject four exam, the knowledge points about dangerous flammable solids are quite practical, including sulfur, matches, rosin, and phosphorus. Sulfur is commonly found in firecrackers or pesticide storage, matches and flint are well-known for being easy to ignite, and rosin is widely used in adhesives, catching fire with just a little friction. While studying these, I wondered why the exam emphasizes them? It's because vehicle vibrations or high temperatures during transport could trigger them. For example, if sulfur is stored in the car trunk in summer with improper packaging, heat generated from tire friction could cause it to catch fire. New drivers are most likely to overlook this, so the subject four exam tests how to handle such emergencies, such as parking away from fire sources and using fire extinguishers. In short, memorizing this list can prevent major accidents. Safety comes first, so checking cargo before driving is crucial.
