How many points can be deducted from a newly added motorcycle license?

How to Maintain the Car Cooling System?

Here are the methods for maintaining the car cooling system: 1. Selection of coolant: It is best to use river water with low hardness. If well water is used, it should be boiled and softened before use. The best option is to use antifreeze. 2. Pay attention to the technical condition of each component: If the radiator is found to be leaking, it should be repaired. If the water pump or fan is found to wobble or make abnormal noises, they should be repaired promptly. 3. Inspection and adjustment of fan belt tension: If the fan belt is too loose, it not only affects the cooling airflow but also increases the engine workload and accelerates belt wear due to slipping. If the belt is too tight, it will accelerate the wear of the water pump bearing and generator bearing. Therefore, the belt tension should be checked during use and adjusted if necessary. If it does not meet the specifications, the position of the generator and adjusting arm can be changed for adjustment. 4. Regular descaling: After the engine has been used for a certain period, scale will deposit in the water tank and radiator, affecting heat dissipation. Therefore, regular cleaning is necessary. The cleaning method involves adding enough cleaning solution to the cooling system, soaking for a period, then starting the engine to run at low to medium speed for a certain time before draining the cleaning solution while it is hot, followed by rinsing with clean water. 5. If the engine is found to be overheating, check promptly for water shortage. If there is a shortage, stop the engine and add sufficient coolant after it cools down. If the thermostat is not functioning properly, causing the engine to operate at excessively high or low temperatures, it should be repaired or replaced promptly.

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How often should the rear axle oil be changed?

Rear axle oil, also known as gear oil, does not have a fixed replacement cycle. It needs to be determined based on the vehicle's driving conditions and environment. Additionally, different oil brands may require different replacement intervals. Generally, rear axle oil should be changed every 20,000 to 30,000 kilometers. Owners can check the oil level every 7,500 kilometers and top it up if it is low. Below are the key properties of gear oil: 1. Gear oil has high viscosity, forming a thicker lubricating oil film, which provides relatively greater load-bearing capacity. 2. Sufficient extreme pressure and anti-wear properties. Extreme pressure and anti-wear properties are the most important characteristics of gear oil, primarily used to prevent wear, scuffing, and scoring of gear surfaces during operation. 3. Good demulsibility. If gear oil emulsifies upon contact with water, it can severely affect the formation of the lubricating oil film, leading to scuffing and wear. 4. Good oxidation stability and thermal stability, ensuring the service life of the oil. 5. Excellent anti-foaming properties. 6. Good rust and corrosion prevention. Corrosion and rust not only damage the geometric characteristics and lubrication state of gears but also further deteriorate the gear oil, creating a vicious cycle.

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What are the common symptoms of transmission failure?

Here are common transmission failures: 1. Oil leakage: Oil seeps from the transmission housing or oil pan, which may be caused by aging seals leading to poor sealing, or manufacturing defects resulting in sand holes in the housing. 2. Engine stalling when shifting into gear: Stalling when shifting into D or R may be caused by a damaged lock-up solenoid valve or a stuck lock-up control valve. 3. Locked gear: Incorrect input or output signals from the transmission, or issues with components or circuits, sometimes due to communication problems between the transmission computer and other system computers. 4. No response when shifting into gear: The vehicle does not move after shifting into D or R and releasing the brake. This is often caused by damage to the input shaft or reverse clutch, or failure of the D/R brake. 5. Gear shift shock or jerking during driving is also a common symptom of automatic transmission failure, possibly due to dirty transmission fluid causing valve body sticking. 6. Transmission slipping during driving, lack of acceleration, engine revving without speed increase, and overall vehicle weakness are mostly caused by burnt clutch plates. 7. Water in transmission: External factors causing water to enter the transmission, leading to abnormal operation, possibly due to oil mixing with coolant or water entering through the transmission vent cap. 8. Abnormal noise: Unusual sounds from the transmission area during driving are often caused by worn parts or improper transmission installation.

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How to Distinguish Between 92 and 95 Gasoline?

92 and 95 gasoline can be distinguished in the following aspects: 1. Composition of 92 and 95: 92 gasoline consists of 92% isooctane and 8% n-heptane, while 95 gasoline is composed of 95% isooctane and 5% n-heptane. The reason 95 gasoline is slightly more expensive is due to its higher proportion of isooctane. Isooctane also has another function, which is anti-knock. This means the higher the proportion of isooctane, the better the anti-knock performance. Each engine is given a comprehensive evaluation before leaving the factory, and based on the engine's performance and other data characteristics, the anti-knock requirement is specified, which determines the grade of gasoline to be used. 2. Price difference between 92 and 95: A tank of 95 gasoline is slightly more expensive than a tank of 92 gasoline. By subtracting the price of 92 gasoline from that of 95 gasoline and then multiplying by 8, you can obtain the price difference per 100 kilometers of car fuel consumption. 3. Power of 92 and 95: 95 gasoline with a higher octane rating is suitable for engines with higher compression ratios. This is because as the operating speed of such engines increases, the ignition timing in the cylinder will advance more and more. When the speed reaches a critical point, the air-fuel mixture in the cylinder may ignite prematurely before the spark plug fires, a phenomenon known as "knocking." Increasing the octane rating of gasoline can effectively enhance anti-knock performance.

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Difference Between Dual-Piston Calipers and Single-Piston Calipers?

The difference between dual-piston calipers and single-piston calipers lies in their design approaches. Here are the specific details: Single-piston calipers, commonly found in mass-market vehicles, typically feature a unidirectional piston configuration. The brake pad on the opposite side is pushed by the reaction force of the caliper, hence earning the name "floating caliper." In contrast, dual-piston calipers have both inner and outer sides fixed, with each side's brake pad clamping force managed by separate pistons, thus referred to as "fixed calipers." When comparing single-piston calipers to multi-piston calipers, single-piston designs often leave unused space that cannot be filled. To minimize the caliper body's size and maximize piston area, dual-piston calipers were developed. Most single/dual calipers on the market are floating calipers (also called unidirectional floating calipers). True multi-piston calipers, however, are fixed brake calipers (also known as fixed opposed-piston calipers). Floating brake calipers generally have brake pistons only on one side. When the piston presses the friction pad against the brake disc, only one side makes contact initially. As hydraulic pressure peaks, the piston can no longer extend outward, creating a reaction force that moves the entire caliper, bringing the opposite friction pad into contact with the disc. When both pads engage, full braking force is achieved. Thus, the floating caliper's key feature is its ability to shift laterally, ensuring both friction pads contribute to braking. Opposed-piston calipers, on the other hand, feature pistons on both sides that simultaneously push the friction pads against the brake disc to generate braking force. This design necessitates a fixed caliper position during operation.

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Can You Continue Driving When the Car's Oil Light Comes On?

When the car's oil light comes on, you should not continue driving. It is necessary to pull over and conduct a thorough inspection or repair of the vehicle before continuing. The purpose of the oil warning light is to alert the driver that the engine's oil level is low and needs to be replenished as soon as possible to avoid affecting the engine's normal operation. In severe cases, it may cause the engine to seize. Below are the steps to address the issue when the oil light comes on: 1. Stop the vehicle immediately and wait for 5-10 minutes before carefully opening the hood (do not open it immediately after stopping to avoid burns). 2. Check the oil level. If it shows that the oil level is low, you need to add oil. If you do not have spare oil, pull over immediately and contact rescue services if the engine starts shaking or the noise increases. 3. After adding oil, restart the vehicle to see if the oil light still comes on. If the light does not come on, it indicates that the issue was caused by low oil level, which is not a major problem. 4. Although you can continue driving, it is strongly recommended to visit a 4S shop or repair station as soon as possible to determine the cause of the oil consumption. 5. If the oil level is within the acceptable range, you should safely pull over and contact a 4S shop rescue vehicle for immediate repairs. The warning light may be caused by damaged oil system components or abnormal pressure. Continuing to drive may worsen the issue and even lead to engine failure.

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How many points can be deducted from a newly added motorcycle license?

How to Maintain the Car Cooling System?

How often should the rear axle oil be changed?

What are the common symptoms of transmission failure?

How to Distinguish Between 92 and 95 Gasoline?

Difference Between Dual-Piston Calipers and Single-Piston Calipers?

Can You Continue Driving When the Car's Oil Light Comes On?

Why is there a gasoline smell inside the car when starting it?

Are the hazard warning flasher and double flasher the same light?

How to Properly Use High Beam and Low Beam Headlights?

Can a C1 driver's license drive a yellow-plate vehicle?