How to Deal with Yellowing Car Light Covers?

How Many Times Can You Take Driving Test Subject 2 and Subject 3?

Subject 2 and Subject 3 each allow 5 attempts. If you fail to pass within these five attempts, you must re-enroll in driving school and retake Subject 1. Below are the relevant details: 1. There are four subjects in the driving test. Subject 2 and Subject 3 are practical driving tests, while Subject 1 and Subject 4 are theoretical tests. There is no limit to the number of times you can schedule the theoretical tests. 2. Within the 3-year validity period of the driving skill test permit, you cannot schedule Subject 2 and Subject 3 road driving skill tests more than 5 times each, meaning a total of 10 attempts for both subjects. If you fail the 5th attempt, any previously passed subjects will be invalidated. 3. Although there is no limit to the number of times you can schedule Subject 1 and Subject 4, meaning no limit on retakes, you only get one retake opportunity on the scheduled test day. However, Subject 4 can only be taken after passing Subject 3 road driving skill test. If you fail, you can directly apply for a retake, and the previously passed road driving skill test results remain valid.

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Is Car Shaking Related to Gasoline?

Engine shaking is related to gasoline. Using low-octane gasoline can cause knocking, which leads to engine shaking. The engine is the device that provides power to the car, converting the thermal energy of gasoline and diesel into mechanical energy by burning the expanding gas in a sealed cylinder to push the piston and perform work. Its components are as follows: 1. Valve train. 2. Crank linkage mechanism. 3. Ignition system. 4. Cooling system. 5. Lubrication system. 6. Starting system. 7. Supply system. The engine maintenance methods are as follows: 1. Use qualified engine oil. 2. Use qualified coolant and antifreeze. 3. Regularly clean the radiator scale. 4. Regularly clean engine carbon deposits. 5. Regularly replace the car's three filters. 6. Maintain a reasonable speed.

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What are the main functions of an engine lubrication system?

The engine lubrication system has the following functions: 1. Lubrication: Engine oil forms an oil film between moving parts, reducing friction resistance and power loss, and minimizing component wear. 2. Cooling: The fluidity of engine oil helps dissipate heat from engine components, preventing overheating and potential damage. 3. Cleaning: Circulating engine oil carries away metal particles generated during operation, dust from the atmosphere, and solid combustion byproducts, preventing abrasive wear between components. 4. Sealing: The viscosity of engine oil allows it to adhere to moving parts, enhancing sealing effectiveness and reducing gas leakage. 5. Anti-corrosion: The lubricating oil film adheres to metal surfaces, isolating them from air and moisture, providing rust and corrosion protection.

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What is the reason why the engine cannot exceed 4000 RPM when idling?

If the engine cannot exceed 4000 RPM when idling, it is necessary to check the fuel system, especially the fuel pump. Possible causes include the use of poor-quality fuel or a dirty fuel tank leading to fuel line blockage. Cleaning the fuel tank and replacing the fuel pump core can resolve the issue. Another potential cause is automatic transmission slippage, accompanied by severe wear or even burning of the clutch or brake friction plates. Precautions for using a car engine are as follows: 1. Avoid driving in neutral: The engine itself has a fuel-cut function during deceleration, and driving in neutral is not conducive to fuel economy; 2. Pay attention to observation during daily use: If oil is found on the ground, determine whether there is an engine oil leak and communicate with the car 4S store in time to eliminate safety hazards; 3. For cars equipped with turbochargers: Do not turn off the engine immediately after high-speed driving or climbing a slope. Let the engine idle for 10 minutes before shutting it off. The speed of carbon deposit formation in cars with turbochargers is several times faster than that of naturally aspirated cars; 4. When brake oil is mixed with or absorbs water, or when impurities or sediments are found in the brake oil, it should be replaced or carefully filtered in time. Otherwise, it will cause insufficient brake pressure, thereby affecting the braking effect.

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What happens if you turn the steering wheel too early when reversing into the right parking space?

Turning the steering wheel too early when reversing into the right parking space may cause the left edge of the vehicle to press against the left boundary line of the parking space, and if done too early, the vehicle may not enter the garage. Below is an introduction to the correct method and precautions for reversing into a parking space: Correct method for reversing into a parking space: When starting to reverse, turn the steering wheel one and a half turns to the right. Observe the right rearview mirror to ensure that the distance between the top of the wheel and the right boundary line of the parking space is about 40 cm. This ensures that the right side of the vehicle will not press against the line when reversing into the parking space. Observe the left rearview mirror, and as soon as you can see the left boundary line of the parking space, immediately turn the steering wheel half a turn to the left. Continue reversing. Precautions for reversing into a parking space: First, maintain a steady speed and control the clutch properly. The vehicle speed should remain stable, not fluctuating between fast and slow, as this is not conducive to reversing into the parking space. Practice driving straight forward and in reverse to improve your control over the clutch. There are many key points when reversing into a parking space. During regular practice, note down each key point. When reversing into the parking space, quickly turn the steering wheel when the vehicle reaches the corresponding point. Turning too late can easily lead to failure. Students should focus on developing the ability to recognize key points and turn the steering wheel during regular practice, achieving coordination between eyes and hands.

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What is the maximum speed limit for passenger cars on highways in kilometers per hour?

According to the relevant regulations of the Road Traffic Safety Law, highways should indicate the speed limits for each lane. The maximum speed must not exceed 120 kilometers per hour, and the minimum speed must not be lower than 60 kilometers per hour. On highways, the maximum speed for small passenger cars must not exceed 120 kilometers per hour, while other motor vehicles must not exceed 100 kilometers per hour, and motorcycles must not exceed 80 kilometers per hour. As stipulated in the "Road Traffic Safety Law Implementation Regulations," if there are two lanes in the same direction, the minimum speed for the left lane is 100 kilometers per hour. If there are three or more lanes in the same direction, the minimum speed for the leftmost lane is 110 kilometers per hour, and the minimum speed for the middle lane is 90 kilometers per hour. If the speed limit indicated by road signs conflicts with the above lane speed regulations, drivers must follow the speed limit indicated by the road signs. Highway driving precautions: Pedestrians, non-motor vehicles, tractors, agricultural vehicles, electric bicycles, wheeled special machinery, full-trailer tractors, and motor vehicles with a designed maximum speed below 70 kilometers per hour are not allowed to enter highways. Additionally, drivers with a learner's permit are not allowed to drive on highways. Vehicles entering highways must be equipped with a warning sign for breakdowns. After entering the highway, motor vehicles should accelerate to at least 60 kilometers per hour as soon as possible. Vehicles entering the highway from an on-ramp must increase their speed in the acceleration lane and turn on the left turn signal. When merging into the traffic lane, they must not obstruct the normal flow of other vehicles.

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How to Deal with Yellowing Car Light Covers?

How Many Times Can You Take Driving Test Subject 2 and Subject 3?

Is Car Shaking Related to Gasoline?

What are the main functions of an engine lubrication system?

What is the reason why the engine cannot exceed 4000 RPM when idling?

What happens if you turn the steering wheel too early when reversing into the right parking space?

What is the maximum speed limit for passenger cars on highways in kilometers per hour?

What is the working principle of the brake pump?

Why Does the Truck's Beidou System Go Offline?

Can I Get a Refund for Driving School Tuition After Passing Subject One?

What does NFC/RFID car key mean?