What are the evaluation indicators for automobile fuel economy?

What is the minimum speed when visibility is less than 200 meters?

When visibility is less than 200 meters, turn on the fog lights, low beam lights, outline marker lights, and front and rear position lights. The speed should not exceed 60 kilometers per hour, and maintain a distance of more than 100 meters from the vehicle in front in the same lane. Below is relevant information: When driving on highways under low visibility weather conditions such as fog, rain, snow, sandstorms, or hail, motor vehicles should comply with the following regulations: 1. When visibility is less than 200 meters: Turn on the fog lights, low beam lights, outline marker lights, and front and rear position lights. The speed should not exceed 60 kilometers per hour, and maintain a distance of more than 100 meters from the vehicle in front in the same lane. 2. When visibility is less than 100 meters: Turn on the fog lights, low beam lights, outline marker lights, front and rear position lights, and hazard warning flashers. The speed should not exceed 40 kilometers per hour, and maintain a distance of more than 50 meters from the vehicle in front in the same lane. 3. When visibility is less than 50 meters: Turn on the fog lights, low beam lights, outline marker lights, front and rear position lights, and hazard warning flashers. The speed should not exceed 20 kilometers per hour, and exit the highway as soon as possible from the nearest exit. 4. In the above-mentioned situations: Highway management departments should display speed limits, distance maintenance, and other prompt information via message boards or other means.

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What to Do When the Rear Brakes Lock Up?

First, try forcing the car to start by stepping hard on the accelerator. As long as the rear wheels move, the issue should resolve. Second, remove the tire and lightly tap the brake drum with a hammer or similar tool to loosen the contact surface between the brake drum and the brake pads. Below are classifications related to brake lock-up: 1. Brake lock-up caused by the brake caliper not retracting: Simply put, even when not pressing the brake pedal, you may feel significant resistance from the car, and in severe cases, abnormal noises or even wheel lock-up may occur. If the brake fluid hasn't been changed for a long time, leading to internal rust in the brake caliper, it can be repaired by sanding with sandpaper and applying grease. If the caliper itself is faulty, it may need to be replaced directly. 2. Static wheel lock-up after parking: The vehicle may lock up after being parked overnight. This phenomenon often occurs in vehicles with drum brakes on the rear wheels. The friction pads are semi-metallic-based brake pads, and the brake drum is made of cast iron. When the parking brake is engaged, the brake pads and drum are tightly pressed together. If exposed to water, metal oxidation and rust can cause adhesion. The solution is to spray rust remover or sand with sandpaper.

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Does increasing the wheel size by one inch affect the car?

Increasing the wheel size by one inch affects the annual inspection. The annual inspection requires the vehicle to remain in its factory condition, and upgrading the wheels and tires to a larger size is considered a modification. In stricter regions, it is generally difficult to pass the annual inspection. Below is relevant information about vehicle annual inspections: 1. Annual inspection rules: According to Article 16 of the "Road Traffic Safety Law Implementation Regulations," effective from July 1, 2018, motor vehicles must undergo safety technical inspections within the following periods from the date of registration: passenger vehicles for commercial use must undergo an annual inspection every year within the first 5 years, and every 6 months after exceeding 5 years, etc. 2. Rules for annual inspection labels: Starting from June 20, 2020, electronic vehicle inspection labels have been implemented nationwide. Electronic inspection labels for motor vehicles are issued through the unified national internet traffic safety comprehensive service platform.

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What is used to clean carbon deposits in diesel vehicles?

Fuel system cleaner can be used to remove carbon deposits in diesel vehicles. Simply add the fuel system cleaner after refueling. The following are the functions of fuel system cleaner: 1. Remove carbon deposits: High-quality gasoline additives contain purifying factors that can clean harmful substances such as gums in fuel and carbon deposits in the engine. Continuous use can eliminate carbon deposits in the fuel injection nozzles, intake valves, and intake manifolds of the fuel system, restoring the vehicle's original power and maintaining optimal working conditions for a long time. 2. Improve atomization: Gasoline additives use nano-molecular materials to directly attack the long-chain carbon bonds in fuel molecules, creating "micro-explosions" in the combustion chamber, which leads to secondary atomization of gasoline, complete combustion, improved thermal efficiency, and reduced fuel consumption. 3. Protect the engine: High-quality gasoline additives are composed of more than 10 materials, including organic nano-molecules, cleaning activation factors, antioxidants, anti-corrosion agents, and demulsifiers. They are specifically designed to address harmful components in fuel, such as sulfur, gums, and engine carbon deposits. Gasoline additives also have functions such as oxidation resistance, cleaning, dispersion, demulsification, anti-corrosion, and lubrication.

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What gear is used for Subject 2 driving test?

Subject 2 is divided into reverse parking and platform tests. The reverse parking test involves switching between 1st gear and reverse gear. Below is relevant information: 1. Reverse parking and platform: Subject 2 consists of reverse parking and platform tests. The reverse parking test requires switching between 1st gear and reverse gear, while the platform test includes parallel parking, also involving switching between 1st gear and reverse gear. All other test items are conducted in 1st gear. 2. Not recommended to use 2nd or 3rd gear: It is safer to use 1st gear, and using 2nd or 3rd gear is not recommended. The reason is that test vehicles in Subject 2 generally do not have an accelerator pedal, and the vehicle lacks sufficient speed to shift into 2nd or even 3rd gear. This may directly cause the vehicle to stall, leading to an immediate stop and resulting in automatic failure. Additionally, excessive speed significantly increases the likelihood of crossing the line.

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What Causes Tire Delamination?

Tire delamination may be caused by insufficient compaction between components during manufacturing, oil stains or foreign objects on the surface of semi-finished components, overloading or excessive speed driving, low-pressure driving, etc. The following is relevant information about tires: 1. Main material: The main material of tires is rubber, and the characteristic of rubber is that it ages after prolonged use or storage, leading to significant changes in the physical properties of the tire, such as hardness and wear resistance. If an aged tire continues to be used, it may affect vehicle performance at best or cause a blowout at worst. 2. Service life: Generally, all-season tires or economy tires have a service life of 3-5 years, with a mileage of about 50,000 kilometers. Under normal circumstances, the service life of tires is sufficient for one year after leaving the factory.

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What are the evaluation indicators for automobile fuel economy?

What is the minimum speed when visibility is less than 200 meters?

What to Do When the Rear Brakes Lock Up?

Does increasing the wheel size by one inch affect the car?

What is used to clean carbon deposits in diesel vehicles?

What gear is used for Subject 2 driving test?

What Causes Tire Delamination?

What is the impact of the jurisdiction of a driver's license?

Which has a longer lifespan, aluminum frame or carbon frame?

What Causes Air Brake Lock-Up?

What brand of car is represented by four circles?