How to Handle a 12-Point Deduction on the Highway at Once?

Can a Flood-Damaged Car Be Used? What Should Be Noted?

If a vehicle has been flood-damaged, it is recommended not to drive or use it. Below is extended information about the hazards of flood-damaged cars: 1. Electronic control systems inside the car: The mixed rainwater is highly corrosive and can affect the functionality of electrical components, especially future usage. Since most cars are equipped with electronic control systems (e.g., engine ECU, ABS system, SRS system, GPS navigation, etc.), if they encounter water ingress, it can cause short circuits in the ECU's internal IC circuit board and rust spots on connector terminals. This gradually leads to rusting of metal parts, poor contact in circuits, and even short circuits that may cause burning. 2. Engine: The engine connecting rod may deform, resulting in shortened piston stroke and incomplete gas compression. The piston rings may lose elasticity or fail to seal properly, causing gas leakage. Compressed gas may leak into the crankcase. If the intake and exhaust valves do not seal properly when closed, compressed gas may leak into the intake and exhaust manifolds.

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Can AWD vehicles with on-demand 4WD undergo roller testing?

AWD vehicles with on-demand 4WD can undergo roller testing, but the testing method requires using the dual-idle operating condition method, not the simulated driving condition method used for 2WD vehicles. For on-demand 4WD vehicles, the 4WD system will automatically engage without manual control, so it's important to inform the inspector about the vehicle's configuration during testing. Additional information: On-demand 4WD only switches to four-wheel drive when appropriate, otherwise it remains a two-wheel drive system. The system automatically switches between 2WD and 4WD modes based on road conditions without requiring manual operation. On-demand 4WD differs from part-time 4WD that requires manual switching between 2WD and 4WD, as well as full-time 4WD that operates in four-wheel drive under all conditions.

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Do Flood-Damaged Cars Have Many Issues After Repair?

After being repaired, various components of a flood-damaged car will be affected, and there will likely be many issues post-repair. Here are some considerations for flood-damaged cars: 1. Pay attention to the powertrain: If the car has been submerged, it can only be repaired through a complete overhaul. To determine if the engine has been disassembled and overhauled, check the engine mount screws and other screws on the engine for signs of disassembly. For example, engine mount screws are marked with torque lines during factory assembly, and these marks will not align after disassembly. 2. Classification: Generally, flood-damaged cars are divided into three levels: water-wading cars, partially submerged cars, and fully submerged cars. The extent of damage varies depending on the degree of submersion.

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What is the principle behind the rotation of a waterwheel?

Waterwheels are generally built in areas with rapid water flow, utilizing the upstream current to drive their movement. The bamboo tubes serve as impellers: they bear the impact of water (provided by the kinetic energy (velocity) of the water), and the energy obtained causes the waterwheel to rotate. This rotation overcomes the frictional resistance of the waterwheel and the counter-torque from the lifted water. Below is an introduction to waterwheels: 1. Introduction: The waterwheel, an irrigation tool, is a mechanical device developed by the ancient Chinese laboring people by fully utilizing hydraulic power. According to historical records, waterwheels appeared around the Eastern Han Dynasty. As an important component of China's agricultural culture, the waterwheel embodies the creativity of the Chinese nation, witnesses Chinese agricultural civilization, and provides evidence for the history of hydraulic research. The invention of the waterwheel laid the foundation for people's peaceful living, social harmony, and stability. 2. Structure: The waterwheel stands over 10 meters tall, supported by a 5-meter-long axle with a diameter of 0.5 meters, from which 24 wooden spokes radiate outward. At the end of each spoke is a scraper and a water bucket. The scraper scoops water, and the bucket holds it.

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What Are the Causes of Diesel Engine Idling Shaking?

Common causes of diesel engine idling shaking: 1. A certain cylinder's fuel injector nozzle is stuck or has poor atomization, causing the cylinder to not work or work poorly (blue-white smoke will be emitted from the exhaust). This can be checked using the cylinder cut-off method. 2. Uneven idle fuel supply from the fuel injection pump, leading to uneven operation of cylinders at idle. 3. Improper idle adjustment (too low RPM), which can be resolved by adjusting the idle fuel supply screw. 4. Incorrect valve clearance (due to loose adjustment screws, abnormal wear, or abnormal wear of valve pushrods), causing the cylinder to not work or work poorly. This can be fixed by adjusting the valve clearance. 5. Poor valve sealing, resulting in poor operation. 6. Engine overheating or insufficient oil (causing poor lubrication), making it difficult for engine components to operate. Below is additional information on engine idling shaking: Severe engine carbon buildup is the most common cause of car shaking. When there is excessive carbon buildup inside the engine, the gasoline sprayed by the cold start injector is largely absorbed by the carbon deposits, leading to an overly lean air-fuel mixture during cold starts and making it difficult to start. In this situation, the car will only start easily once the carbon deposits have absorbed enough gasoline. After starting, the gasoline adsorbed on the carbon deposits is sucked into the cylinder by the engine's vacuum and burned, making the air-fuel mixture too rich. This causes the engine's combustible mixture to fluctuate between lean and rich, resulting in idling shaking after a cold start. The lower the temperature, the more fuel is needed for a cold start, and the presence of carbon deposits will significantly affect the success of the cold start. The solution is to clean the fuel system and check if the idle control valve has carbon buildup, which should also be cleaned.

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Is it necessary to buy passenger insurance for private cars?

It is necessary to buy passenger insurance for private cars. Here are the relevant details: 1. Based on needs: Private car seat insurance, as a type of passenger protection insurance, should be purchased according to individual needs. Car seat insurance provides compensation for medical expenses or accident payments from the insurance company if the driver or passengers in the car are injured or killed; 2. Target buyers: Car seat insurance covers both passengers and the driver. The insurance can be purchased separately for passengers or the driver, or together for both. The premium for seat insurance is related to the coverage level—the higher the coverage, the larger the premium; 3. Regulations: The compensation scope, items, and standards for injuries or deaths of vehicle occupants are based on the provisions of the 'Road Traffic Accident Handling Measures,' but the maximum compensation per person cannot exceed the per-seat compensation limit. Specific costs include emergency rescue fees, medical expenses, and lost wages, among others.

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How to Handle a 12-Point Deduction on the Highway at Once?

Can a Flood-Damaged Car Be Used? What Should Be Noted?

Can AWD vehicles with on-demand 4WD undergo roller testing?

Do Flood-Damaged Cars Have Many Issues After Repair?

What is the principle behind the rotation of a waterwheel?

What Are the Causes of Diesel Engine Idling Shaking?

Is it necessary to buy passenger insurance for private cars?

Are Car Coolant and Antifreeze the Same?

Does the ETC device require power supply?

How to adjust the headlight height on a Golf?

What is the correct way to use the Civic's one-button start?