
Subject One LOCK is the lock position, which is also the position for inserting and removing the key. There are four positions on the car's ignition switch: LOCK (lock) position, ACC (accessory switch) position, ON (power switch) position, and START (start) position. Subject One, also known as the Subject One theoretical test or driver's 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 Subject One test is conducted on a computer, consisting of 100 questions, with a passing score of 90 or above.

In the subject one exam, I remember the LOCK switch is one of the key positions in the ignition keyhole. It represents the locked state. When you turn the key to this position, the engine completely shuts off, the key can be removed, and the steering wheel locks to prevent car theft. When I was learning to drive, my instructor emphasized this as a mandatory step after parking – forgetting it could lead to vehicle theft or trouble caused by a locked steering wheel. After turning off the engine during daily driving, I've developed the habit of turning the key to the LOCK position, which protects both the vehicle and personal safety. This point is frequently tested in exams because it relates to anti-theft systems and traffic rules – new drivers must remember not to overlook this simple action. From a practical perspective, it provides peace of mind when parking and also saves battery life.

After years of driving, I find the LOCK switch extremely practical. Positioned at the far left of the ignition switch, it completely locks the vehicle, allows key removal, and simultaneously secures the steering wheel to prevent movement. I've seen cases where people forgot to turn to LOCK, resulting in car thefts or accidents at night – terrifying. During the subject one exam preparation, it was highlighted as a key vehicle control knowledge point, reminding us to park safely. Every time I park, I instinctively turn to this position – developing this habit helps prevent malfunctions and risks. Combined with anti-theft features, it's simple yet highly effective. Another point: mock scenario questions in exams frequently test LOCK usage to ensure beginners can operate it correctly and avoid safety hazards.

From a technical perspective, the LOCK switch is located on the ignition switch, positioned slightly to the left. When the key is turned to this position, it cuts off power and activates the mechanical steering wheel lock. Through my exploration, I discovered this design connects to the vehicle's anti-theft mechanism, preventing the wheels from being turned. This detail appears in the subject one exam questions - new drivers must understand it's used for safely parking the vehicle. In daily operation, simply turn the key to the LOCK position after turning off the engine. Though small, neglecting it may cause trouble.

The LOCK switch is a crucial component in the ignition system. Positioned to the left, its function is to turn off the engine, remove the key, and lock the steering wheel. I prioritize safe driving and reinforced this point during my subject one review. Ignoring it poses significant risks, such as the steering wheel failing to lock if not turned to the LOCK position after parking, giving car thieves an opportunity. This knowledge is tested in exams because it fosters the development of safe habits. I also recommend using it in conjunction with anti-theft devices to ensure the vehicle is securely parked.


