What is the function of the braking system?

What to Do If One Eye Fails the Driver's License Renewal Physical Exam?

If one eye fails the driver's license renewal physical exam, you can wear glasses or use other methods to correct your vision to meet the passing standard. If wearing glasses still does not meet the standard, try a different pair of glasses and continue testing until you pass. If you still cannot meet the passing standard after trying other methods, you will not be able to renew your driver's license. Note: If you wear glasses during the vision test, you must also wear them in the photo. Driving does not require perfect uncorrected vision, as long as your corrected vision meets the requirements. Vision requirements for driver's license renewal: For the renewal of a standard car driver's license, the vision requirement is the same as for the initial license training exam: corrected vision must reach 4.9. For driving large buses, trucks, or urban buses (medium and large vehicles), the corrected vision must be 5.0 or higher. If you do not meet the standard (even after correction), you cannot obtain or renew a license for that vehicle type. Physical exam requirements for driver's license renewal: In addition to vision requirements, the renewal process requires no red-green color blindness. While color weakness is not strictly prohibited, it depends on the hospital's test results. There are also specific height requirements: for private car licenses (Class C), the height requirement is relatively low. For medium-sized buses, the minimum height is 150 cm, while for large trucks and buses, it is 155 cm.

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What should be noted for cars without ABS?

Cars without ABS require extra caution on slopes and complex road conditions, maintaining a low and steady speed is advisable. When descending slopes, use a lower gear and avoid continuous braking to prevent overheating of brakes which could lead to safety issues. Additionally, on slippery surfaces or at higher speeds, employing the technique of intermittent braking (pump braking) is necessary to achieve safe deceleration. How car ABS works: During braking, ABS rapidly assesses wheel lock-up status via speed signals from each wheel's sensor. It closes the normally open inlet solenoid valve for wheels beginning to lock, maintaining consistent braking force. If locking persists, the normally closed outlet solenoid valve opens, allowing brake pressure to rapidly decrease through a direct line to the brake fluid reservoir, preventing complete wheel lock-up due to excessive braking force. This keeps braking at the optimal point (20% slip rate), ensuring maximum braking efficiency and driving safety. Functions of car ABS: Maximizes brake performance, reducing braking time and distance; Effectively prevents vehicle skidding and fishtailing during emergency braking, ensuring excellent driving stability; Allows steering during emergency braking, maintaining good steering control; Minimizes intense friction between tires and road surface, reducing tire wear.

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What is the actual fuel consumption of the 2.5L Audi A6L?

2.5L Audi A6L has an actual fuel consumption of 7.6L/100km. The Audi A6L is a mid-to-large-sized sedan launched by Audi. This model has six variants, all equipped with a 2.5L 204-horsepower V6 engine, with a maximum power output of 150kW and a maximum torque of 250Nm. The fuel tank capacity of all six variants of the 2.5L Audi A6L is 75L, meaning a full tank can cover a distance of 75/7.6*100=989km. Automobile fuel consumption is directly related to five major factors: driving habits, the vehicle itself, road conditions, natural wind, and ambient temperature. Specific factors that increase fuel consumption are as follows: Driving habits: Aggressive driving behaviors such as rapid acceleration, frequent overtaking, and not easing off the throttle in advance when approaching traffic lights can increase fuel consumption. The vehicle itself: Vehicles with larger displacements generally consume more fuel than those with smaller displacements because larger displacements typically mean higher power output, requiring more gasoline for combustion. Heavier vehicles also have higher fuel consumption due to the need for greater driving torque. Road conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountainous roads increases resistance and fuel consumption. Natural wind: Driving against the wind or on windy days increases vehicle resistance and fuel consumption. Low ambient temperatures: When the engine block is cold, the injected gasoline does not atomize easily, requiring more gasoline for combustion, which increases fuel consumption. Additionally, at low temperatures, the engine control unit may command higher idle speeds to warm up the engine, further increasing fuel consumption.

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What Color of Spark Plug Indicates a Fault?

Spark plugs turning black is a sign of a fault. The blackening occurs due to an overly rich air-fuel mixture, requiring timely cleaning or replacement of the spark plug. Steps for replacing spark plugs: Open the engine hood, lift the plastic cover of the engine, remove the high-voltage distributor wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing, check for any external debris like leaves or dust and ensure thorough cleaning. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, then use the socket to tighten it further. Reinstall the high-voltage distributor wires according to the firing order and secure the cover. Spark plug replacement intervals: Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it's advisable to follow the user manual. The following standards can be referred to for maintenance replacement: Platinum spark plugs should be replaced at 40,000 kilometers, standard nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs between 60,000 to 80,000 kilometers.

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What Are the Main Causes of Engine Oil Burning?

The main causes of engine oil burning are as follows: Carbon deposits: Due to the inconsistency between domestic fuel quality and international standards, a large amount of carbon deposits can easily form in the combustion chamber during engine operation. Carbon deposits are the root cause of various engine problems. Carbon deposits accumulate in the piston grooves, causing the piston rings to stick together, which prevents them from sealing completely. The 'stuck' piston rings significantly reduce the oil sealing capability. Additionally, sludge can clog the oil return holes, preventing the oil from returning normally and leading to increased oil consumption. Carbon deposits also exacerbate the wear between the piston and cylinder wall, creating excessive gaps and allowing oil to enter the combustion chamber. Valve stem seal corrosion and aging: Corrosion and aging of the valve stem seals result in poor sealing. Valve stem seals are among the most prone to aging and wear in the engine. Cars with over 100,000 kilometers of driving typically have this issue. Front and rear crankshaft seal aging: The front and rear crankshaft seals are in extensive and continuous contact with oil. The impurities in the oil and temperature changes within the engine gradually weaken their sealing effectiveness, leading to oil seepage or leakage. Damage to the oil seal between the turbocharger and intake pipe: The main reason for this is excessively long oil change intervals or the use of inferior oil, which results in insufficient lubrication and cooling for the floating turbo main shaft, thereby damaging the oil seal.

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What are the traffic signal passage requirements?

Traffic signal passage requirements are as follows: 1. Green light signal: It is a permission signal. When the green light is on, vehicles and pedestrians are allowed to pass, but turning vehicles must not hinder the passage of straight-going vehicles and pedestrians. 2. Directional indicator signal: Directional signals are special indicator signals that direct the movement of motor vehicles. Different arrow directions indicate whether a vehicle should go straight, turn left, or turn right. 3. Pedestrian crossing signal: Pedestrian crossing signals include a green light and a red light, with meanings similar to those of intersection signals. When the green light is on, pedestrians are allowed to cross; when the red light is on, pedestrians are prohibited from entering the crossing, but those already in the crossing may continue or wait at the centerline. 4. Flashing warning signal: A continuously flashing yellow light alerts vehicles and pedestrians to proceed with caution after confirming safety. This signal does not control right-of-way and may be suspended above intersections or used at night when regular signals are off to remind drivers and pedestrians to proceed carefully. At intersections with flashing warning signals, vehicles and pedestrians must follow safety principles and traffic rules for uncontrolled intersections. 5. Lane signal: Lane signals consist of a green arrow and a red cross, installed on variable lanes and applicable only to that lane. A green arrow permits passage in the indicated direction, while a red cross or arrow prohibits it. 6. Yellow light signal: The yellow light's meaning is between green and red, both prohibiting and allowing passage. When the yellow light is on, it warns drivers and pedestrians that the passage time is ending and a red light is imminent. Vehicles should stop behind the stop line, and pedestrians should not enter the crossing. However, vehicles too close to stop may proceed, and pedestrians already in the crossing should assess oncoming traffic to proceed quickly, stay put, or retreat. 7. Traffic baton signal: When a traffic officer signals stop with a baton, vehicles must not proceed. Vehicles that have already passed the stop line may continue. A straight signal allows vehicles to go straight, and right-turning vehicles may proceed if they do not hinder others. A left-turn signal permits left-turning and straight-going vehicles, while right-turning vehicles and straight-going vehicles at T-intersections without crossings may proceed if they do not hinder others. 8. Red light signal: The red light is a mandatory stop signal. When this signal is on, prohibited vehicles must stop behind the stop line, and prohibited pedestrians must wait at the sidewalk. Vehicles waiting must not turn off engines, open doors, or have drivers leave. Bicycles must not detour left turns outside the intersection or use right turns to bypass straight paths. 9. Hand gesture signal: Hand signals include straight, left turn, and stop. When traffic signals, signs, or markings conflict with an officer's hand signals, the officer's commands take precedence.

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What is the function of the braking system?

What to Do If One Eye Fails the Driver's License Renewal Physical Exam?

What should be noted for cars without ABS?

What is the actual fuel consumption of the 2.5L Audi A6L?

What Color of Spark Plug Indicates a Fault?

What Are the Main Causes of Engine Oil Burning?

What are the traffic signal passage requirements?

How many points are deducted for brushing the line during a right-angle turn?

What does a white parking space line mean?

What is a PCV Valve in a Car?

Where is the left turn signal located on a car?