Brief Introduction on How to Practice Defensive Driving

Why does the warning light come on after replacing spark plugs?

Poor combustion of air-fuel mixture, sensor issues, maintenance problems, and fuel quality issues. Spark plugs are crucial components in a gasoline engine's ignition system. They introduce high voltage into the combustion chamber and create sparks by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Under high voltage, the air between the spark plug's center electrode and side electrode rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between electrodes reaches a certain level, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties. This creates a discharge channel between the gap, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body known as a "spark." Accompanied by thermal expansion, it also produces a "crack" sound. The temperature of this electrical spark can reach 2000-3000°C, which is sufficient to ignite the air-fuel mixture in the cylinder's combustion chamber.

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Is it necessary to slow down when changing lanes in Subject 3?

Whether to slow down when changing lanes in Subject 3 depends on the actual situation. Here are the relevant details: 1. Exam challenges: The main challenges in Subject 3 include: First, speed and gear mismatch. During the exam, you must constantly monitor the speedometer and accelerate or decelerate appropriately before shifting gears. Second, vehicle deviation. Examinees often struggle to judge the vehicle's direction and worry about not maintaining a straight trajectory. 2. Exam content: The Subject 3 exam includes 16 items such as vehicle preparation, light simulation, starting, straight-line driving, passing intersections, left and right turns, etc. Each item is announced via voice command in the exam vehicle, and examinees must respond accordingly. The exam is scored out of 100 points.

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How to Use Turn Signals Correctly?

Turn signals should be used as follows: 1. When overtaking, first activate the left turn signal, then use the right turn signal after completing the overtake. 2. Use the left turn signal when entering a highway. When exiting a highway, always turn right. No signal is needed when entering a roundabout, but the right turn signal must be used when exiting. 3. Use the right turn signal when pulling over to park. When leaving the roadside, always turn left, so use the left turn signal. 4. For U-turns, which are generally made to the left, use the left turn signal. Use the left signal for lane changes to the left, and the right signal for lane changes to the right. 5. Always activate the turn signal in advance when preparing to turn, giving following drivers adequate reaction time.

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What Does Car Cruise Control Mean?

Car cruise control is used to maintain a constant speed for the vehicle. Once the car is set to cruise mode, the engine's fuel supply is controlled by the computer, which continuously adjusts the fuel injection based on road conditions and driving resistance to keep the car at the preset speed without the need to operate the throttle. Currently, cruise control systems have become standard equipment in mid-to-high-end cars. Relevant details are as follows: 1. The most obvious advantage of cruise control is that it can free the driver's limbs, significantly reducing fatigue during long-distance steady-speed driving, while also saving excessive fuel consumption caused by frequent speed changes. 2. Cruise control cannot precisely regulate the car's speed. It relies on speed sensors to determine the vehicle's speed and control the throttle. However, during downhill driving, the car may accelerate due to gravitational potential energy. Although the system can continuously adjust based on sensor feedback, the speed may still exceed the set limit during descent.

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Why Is There Water Under the Driver's Seat?

Here are the reasons why there is water under the driver's seat: 1. Unclosed windows during rain: After getting out of the car, failing to ensure the windows are tightly closed can allow rainwater to seep into various parts of the car. Over time, this leads to water dripping under the driver's compartment. 2. Drainage issues: If the driver's compartment still drips after ruling out human factors, the car's drainage outlets should be inspected. Below is additional information related to water-damaged vehicles: 1. Specific definition of water-damaged vehicles: Vehicles that have accumulated water, with internal components damaged due to water exposure, and classified according to water submersion levels. 2. Classification of water submersion levels: Level 1 - water just reaches the vehicle's chassis; Level 2 - water reaches half the height of the wheels; Level 3 - water almost completely submerges the tires; Level 4 - water reaches the engine hood; Level 5 - water completely submerges the engine hood; Level 6 - water submerges the car roof.

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What Causes the Transmission Noise in Leiling?

The abnormal noise in the Leiling's transmission can be caused by excessive wear of the brake discs and brake pads, improper installation of brake pads, among other reasons. Regular inspection and replacement are necessary. Typically, brake pads should be replaced every 60,000 to 80,000 kilometers, while brake discs should be replaced every 100,000 to 120,000 kilometers. Excessive Wear of Brake Discs and Brake Pads: Both brake discs and brake pads are high-wear components. Every time the brakes are applied, these two parts experience friction, leading to natural wear over time. When the wear becomes excessive, abnormal noises will occur, hence the need for regular inspection and replacement. Typically, brake pads should be replaced every 60,000 to 80,000 kilometers, while brake discs should be replaced every 100,000 to 120,000 kilometers. Improper Installation of Brake Pads: If the brake pads are installed incorrectly or are of the wrong model, abnormal noises may also occur. In such cases, the brake pads should be reinstalled. When installing brake pads, it is advisable to have the work done at a professional auto repair shop. This is especially important for owners who have had their brake pads replaced at roadside stalls. Other Causes: Generally, faults in components such as the caliper, brake disc, or brake pads can produce such noises. If the noise persists, the first step is to check for any dragging brakes. Poor caliper resetting can cause prolonged friction between the disc and the pad, leading to abnormal noises under certain conditions. Additionally, if there are foreign objects on the brake pads or brake discs, this can also result in abnormal noises.

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Brief Introduction on How to Practice Defensive Driving

Why does the warning light come on after replacing spark plugs?

Is it necessary to slow down when changing lanes in Subject 3?

How to Use Turn Signals Correctly?

What Does Car Cruise Control Mean?

Why Is There Water Under the Driver's Seat?

What Causes the Transmission Noise in Leiling?

Is Gear Shifting Tested in Subject 3 Driving Exam?

Can Autonomous Vehicles Drive on Highways?

What is the battery model for the Jetour X70 Plus key?

Is It Normal for the Electronic Parking Brake to Make Noise?