Which Types of Tire Cracks Require Replacement?

What is the content of the Subject 2 driving test in Guiyang?

The test items for small cars C1 and C2 include reverse parking, parallel parking, stopping and starting on a slope (canceled for C2), right-angle turns, curve driving (commonly known as S-curve), and in some regions, a sixth item of high-speed card collection. The full score for Subject 2 is 100 points, with evaluation criteria set for failing, deducting 20 points, deducting 10 points, and deducting 5 points. A total test score of 80 points or above is considered a pass. There is one attempt for the Subject 2 test. If the test is failed, one retake is allowed. If the retake is not taken or is still failed, the test is terminated, and the applicant must reschedule the test after ten days. Within the validity period of the driving skill test permit, the number of scheduled attempts for the Subject 2 and Subject 3 road driving skill tests must not exceed five. If the fifth scheduled test is still failed, the results of other previously passed subjects will be invalidated.

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What Are the Knowledge Points About Car Air Conditioning?

Car air conditioning knowledge is as follows: 1. Air conditioning vents: Based on the principle that hot air rises and cold air sinks, when using the air conditioning in the car, point the vents upward when cooling and downward when heating. 2. Frequent cleaning: Many car owners often wash their cars but neglect their maintenance. Summer often brings heavy rain and humid weather. If the air conditioning filter is not cleaned in time, it can cause odors and mildew smells in the car. 3. Occasionally use the high-speed fan setting: While using the air conditioning, occasionally setting it to the maximum fan speed can blow out residual dust in the air ducts. 4. How to use the internal and external circulation: When the car is very hot, use the external circulation to release the heat inside the car. Then, once the temperature drops sufficiently, turn on the cooling and switch to internal circulation. 5. Turn on the air conditioning weekly: Try to turn on the cooling function 3-4 times a month for about 5 minutes each time. This can effectively prevent issues like evaporator and compressor aging.

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How to Check the Level of Car Coolant?

To check the amount of car coolant, look at the MIN (minimum) and MAX (maximum) marks on the car radiator. The coolant level should be maintained between the MAX and MIN marks, which indicates a normal level—neither too much nor too little. If the level is below MIN, it means the coolant is insufficient and needs to be topped up. Here’s an introduction to coolant: 1. Coolant Overview: Its full name is antifreeze coolant, meaning it has antifreeze properties. Antifreeze prevents the coolant from freezing during cold seasons, which could otherwise crack the radiator or damage the engine block. 2. Function of Coolant: Its primary role is to keep the engine within the normal temperature range while also providing antifreeze, anti-boiling, and anti-corrosion functions. 3. Coolant Level Location: The expansion tank in the engine compartment has upper and lower limits marked for the coolant level. Visually inspect the coolant level; if it is between these limits, it is at a normal level. If the coolant level is found to be too low, it should be refilled as soon as possible. When refilling, ensure the coolant level is between the upper and lower limits of the expansion tank.

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How to Use 2WD and 4WD?

On paved roads in urban areas, 2WD is sufficient and it improves fuel efficiency. During rainy or snowy weather in the city, you can switch to 4WD mode. Four-wheel drive enhances the vehicle's traction, making it less prone to losing control or skidding on slippery surfaces, thereby improving driving safety. On certain unpaved roads, the 4WD system is necessary for extrication. More related information is as follows: 1. Four-Wheel Drive System: Some high-end four-wheel drive systems can individually distribute torque between the front and rear axles, as well as between the left and right wheels on the same axle. The development of such systems can enhance a vehicle's cornering performance. For example, if the vehicle is turning left, the system can recognize this and allocate more torque to the two wheels on the outside of the turn, helping the vehicle achieve faster cornering speeds. Such four-wheel drive systems are also equipped in some performance cars or supercars, primarily to improve handling and increase speed in corners. 2. Low-Range 4WD Mode: Some rugged off-road vehicles feature a low-range 4WD mode. After switching to this mode, the vehicle speed decreases, but torque increases significantly. Low-range 4WD mode can help the vehicle navigate through extreme terrain conditions smoothly.

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Will the police check if the car roof is wrapped in black?

According to relevant laws and regulations: The decoration or protective measures of a car's appearance can be appropriately chosen based on individual circumstances. Changes to the body color and frame: An application must be submitted to one of the six branches of the Vehicle Management Office under the Traffic Management Bureau. After vehicle confirmation and approval from the Vehicle Management Office branch, the changes can be made. Therefore, wrapping the car roof is not illegal if done under specified conditions, and traffic police will not check it. More relevant information is as follows: 1. Function of car film: Good car film can filter some glare, reduce the intensity of visible light, making the eyes more comfortable, helping to improve the driver's vision and ensure driving safety. It is recommended that users avoid films with too low transparency. For window films, especially those on the front side windows, a transparency of over 85% is more suitable. Moreover, Chinese regulations clearly state that car films must have a light transmittance of over 70% to pass annual inspections. 2. Effect of car film: Some car owners believe that black films will affect annual inspections. In fact, colored films or new different-colored paint covering no more than 30% of the area are acceptable, and traffic police cannot distinguish between black films and panoramic sunroof appearance decorations. However, when choosing car films, besides considering aesthetics and heat insulation, the transparency and clarity of the film should also be taken into account, as these are important aspects of driving safety.

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What are the consequences of overfilling the fuel tank?

Due to thermal expansion and contraction, in hot summer days, if the tank is overfilled, fuel is highly likely to overflow from the vent hole. Once exposed to an open flame, it can easily cause a fire, and in severe cases, even lead to an explosion. The specific details are as follows: 1. Blocking the vent hole: Overfilling the tank can easily block the vent hole. Once the vent hole is blocked, negative pressure will form inside the fuel tank, leading to poor fuel supply or even a complete halt in fuel delivery. Additionally, overfilling can also harm the charcoal canister. The charcoal canister is usually installed between the fuel tank and the engine. Gasoline is a volatile liquid, and under normal temperatures, vapors often exist inside the fuel tank. 2. Evaporative emission control system: The function of the evaporative emission control system is to direct the vapors into combustion and prevent them from evaporating into the atmosphere. During this process, the activated charcoal canister storage device plays a role. If the tank is overfilled, liquid gasoline instead of vapors will enter the charcoal canister, causing damage to it.

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Which Types of Tire Cracks Require Replacement?

What is the content of the Subject 2 driving test in Guiyang?

What Are the Knowledge Points About Car Air Conditioning?

How to Check the Level of Car Coolant?

How to Use 2WD and 4WD?

Will the police check if the car roof is wrapped in black?

What are the consequences of overfilling the fuel tank?

What are the items for annual vehicle inspection?

What Parts Need to Be Replaced for a Flood-Damaged Vehicle?

What are the new driving test regulations in 2021?

Should the Handbrake Be Used When in P Gear?