What is the passing score for C1 Subject 3?

How to Deal with Rear Wheel Lock-Up on BYD F3?

For a BYD F3 experiencing rear wheel lock-up, you can remove the tire and gently tap the brake drum with a hammer a couple of times to loosen the contact surface between the brake drum and the brake pads. Alternatively, pour 100°C boiling water over the brake pad area and then repeatedly move the vehicle forward and backward about three times. Wheel lock-up occurs when the brake clamps the tire tightly, preventing any relative movement between the tire and the brake, causing the tire to skid on the ground. In vehicles without ABS, forcefully pressing the brake pedal while driving causes the wheel speed to drop rapidly. If the braking force exceeds the friction between the tire and the ground, the wheel locks up completely, reducing the friction between the tire and the ground. Causes of Wheel Lock-Up: 1. Sticking or failure of the master cylinder piston cup to return. This is usually caused by water or other contaminants entering the brake system or failure to clean the system before changing to a different brand of brake fluid, causing the master cylinder piston cup to swell. 2. Poor fit between the master cylinder piston cup and the master cylinder bore. This issue often arises during the development phase, where excessive interference between the piston cup and the cylinder bore leads to the piston cup failing to return or returning poorly after braking. 3. Failure of the brake caliper piston to return or return poorly. This can be due to inferior material performance of the square seal or poor dimensional fit among the square seal, caliper bore, and caliper piston, resulting in insufficient return of the square seal and causing wheel drag or even lock-up. 4. Insufficient stiffness of the brake disc. Frequent braking can cause the brake disc to deform under high temperatures due to inadequate stiffness, leading to wheel lock-up during subsequent use.

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How to Clean a Dirty Car Air Conditioner?

Here are the methods for cleaning a car air conditioner: 1. Air Duct Cleaning: Before starting the cleaning process, shake the air conditioner cleaner well and attach the soft tube included in the package. Then, turn the air conditioner's fan to the maximum setting and switch it to external circulation mode. However, do not turn on the air conditioner compressor (keep the A/C button off). Aim the nozzle of the well-shaken cleaner at the position of the air filter and spray. The suction inside will draw the cleaner in, thereby cleaning the air ducts. 2. Precautions: Pay special attention to not placing the soft tube of the cleaner too close to the blower. After spraying the cleaner, the owner can let the air conditioning system run in external circulation mode for about 10 more minutes. After turning off the engine, the cleaner will defoam and turn into a liquid, flowing out of the car through the drainage outlet after cleaning the evaporator and air ducts.

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When to Fully Turn the Steering Wheel for a Right-Angle Turn?

Right-angle turn that time fully turn the steering wheel. More information about right-angle turns is as follows;1. Introduction: The right-angle turn is an assessment point in Subject 2 of the driver's license test, evaluating the driver's ability to correctly operate steering and accurately judge the inner and outer wheel differentials when driving through sharp turns. 2. Technique: The right-angle turn maneuver typically follows curve driving. After exiting the curve, position the vehicle towards the right side, aligning the wiper node with the right boundary line. Maintain this distance while proceeding forward, then decelerate when the front of the vehicle reaches the turning point ahead.

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Can China 5 Vehicles Still Be Registered in Shandong?

China 5 vehicles can no longer be registered in Shandong. More relevant information is as follows: 1. Reason for registration suspension: On July 1, 2019, many cities across the country officially implemented the China 6 emission standards. For cities that have already implemented the China 6 emission standards, vehicles with China 5 emission standards cannot be registered. The time when China 5 vehicles stop being registered is basically the time when the China 6 emission standards are officially implemented. 2. Regions where registration is still possible: However, in places like Hunan, Hubei, Jiangxi, etc., the China 6 emission standards have not yet been implemented, and China 5 vehicles can still be registered normally.

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Why does the engine sound louder after changing the coolant?

Replacing the coolant is generally unrelated to the engine. If you genuinely perceive an increase in noise, first check whether it originates from inside the engine or from external components such as the belt, alternator, water pump, or tensioner. Typically, start by ruling out external noise sources. How to choose coolant: The fundamental indicators of coolant are its freezing and boiling points. Market-available coolants come in various freezing points like -15°C, -25°C, -30°C, and -40°C. It's advisable to select a coolant with a freezing point at least 10°C lower than the lowest temperature in your region. Coolant replacement cycle: Vehicle coolant generally needs replacement every 2 years or 40,000 kilometers. This is merely a reference interval. For commercial vehicles with higher mileage, the replacement cycle should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Monitor the coolant's condition—if levels are low, replenish promptly. If suspended particles, sediment, discoloration, or deterioration are observed, replace the coolant immediately and flush the system.

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Can the sheet metal painting at a BMW 4S store achieve the original factory effect?

BMW 4S store sheet metal painting can only achieve the original factory effect in appearance. The original factory painting environment is dust-free, and the painting is done as a whole, resulting in uniform paint and consistent thickness throughout. However, post-repair painting is done locally, making it uneven compared to the original car paint, and the paint thickness will also differ from the original. Current paint mixing technology can basically restore the original car color, making it difficult to detect with the naked eye. However, differences in paint thickness, painting environment, and temperature can lead to color deviations. The difference between 4S store painting and original factory paint is that while the 4S store can achieve the effect of the original factory paint, it is not the genuine original factory paint. Processes such as electrophoresis in the original factory paint are beyond the capabilities of both 4S stores and repair shops; they can only repair the top three layers: the primer, color coat, and clear coat.

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What is the passing score for C1 Subject 3?

How to Deal with Rear Wheel Lock-Up on BYD F3?

How to Clean a Dirty Car Air Conditioner?

When to Fully Turn the Steering Wheel for a Right-Angle Turn?

Can China 5 Vehicles Still Be Registered in Shandong?

Why does the engine sound louder after changing the coolant?

Can the sheet metal painting at a BMW 4S store achieve the original factory effect?

Precautions for the Break-in Period of an Automatic Transmission New Car

Can car doors be partially repainted?

What is the curb weight of the Geely Emgrand in kilograms?

What to Do When All Driving Points Are Deducted?