How to Check the Scores for Subject 1, Subject 2, and Subject 3 on 12123?

How Many Points Are Required for Annual Vehicle Inspection?

Annual vehicle inspection requires 12 points on the driver's license. Types of Driver's Licenses and Permitted Vehicle Categories: C1 license permits driving small and micro passenger vehicles, light and micro cargo vehicles, and light, small, and micro special-purpose vehicles. C2 license permits driving small automatic transmission vehicles, including small and micro automatic transmission passenger vehicles and light and micro automatic transmission cargo vehicles. C3 license permits driving low-speed cargo vehicles (formerly four-wheel agricultural transport vehicles). C4 license permits driving three-wheeled vehicles (formerly three-wheel agricultural transport vehicles). B2 license permits driving large trucks, heavy and medium cargo vehicles, and large, heavy, and medium special-purpose vehicles. Validity Period of Driver's License: The driver's license is valid for six years. After the six-year validity period expires, it will be replaced with a ten-year validity license. Eligible drivers may receive a long-term valid license. The driver must apply for a license renewal at the vehicle management office where the license was issued or another office 90 days before the expiration date.

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Why Should a New Car's Engine Be Washed?

Washing a new car's engine is aimed at protecting the engine's safety. Regular engine cleaning not only prevents the blockage of lubrication channels but also helps to some extent in removing carbon deposits from piston rings and ring grooves, thereby maintaining the engine and extending its service life. Engine cleaning method: Prepare a paintbrush, spray bottle, engine compartment surface cleaner, two cloths, and a high-pressure air can. First, remove surface dust with the high-pressure air can, then spray the engine compartment surface cleaner, being careful not to spray it inside the battery or fuse box. Wait for about ten minutes before wiping it dry. For wiring connectors, avoid using the engine compartment surface cleaner; instead, clean them with a damp cloth. For stubborn oil stains and crevices, use the spray bottle and paintbrush for careful cleaning, ensuring to control the water amount, spray method, and avoid sensitive areas. Finally, dry any remaining water in the engine compartment with a cloth or by idling the engine to evaporate the moisture. Benefits of engine cleaning: The engine's interior is lined with oil channels, which over time can accumulate sludge and other contaminants. Engine cleaning helps to remove these sludge impurities from the oil channels, ensuring the proper functioning of the engine's lubrication system. By cleaning away sludge and carbon deposits that affect the engine's normal operation, the engine's performance can be improved, and its lifespan extended.

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Can a Differential Lock Be Installed Afterwards?

A rear axle differential lock can be installed aftermarket, but the following three points should be noted: Rear Axle Housing Requires Drilling: Be mentally prepared—aside from fully automatic limited-slip differentials or differential locks, others require drilling holes in the original rear axle housing to connect control wires or tubes to the exterior. Even for Factory Models: They will have this additional hole. If you can't accept this fact, it's better not to opt for installing a lock. Gap Adjustment: Most differential locks replace the original open planetary gear set with a new housing. After the new housing is fixed to the ring gear, the spacing between the ring gear and the pinion gear may change.

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Do Motorcycle Shock Absorbers Need Lubrication?

Motorcycle shock absorbers do not require lubrication as they come with their own built-in lubrication and do not need additional lubrication. Working Principle of Shock Absorbers: The working principle is that when there is relative movement between the frame (or body) and the axle due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber chamber to repeatedly flow from one chamber to another through different pores. At this time, the friction between the pore walls and the oil, as well as the internal friction between oil molecules, creates a damping force that converts the vehicle's vibration energy into heat energy of the oil, which is then absorbed and dissipated into the atmosphere by the shock absorber. Maintenance Methods for Shock Absorbers: After driving the vehicle on a rough road for 10km, stop and touch the shock absorber housing with your hand. If it is not hot enough, it indicates that there is no resistance inside the shock absorber, meaning the shock absorber is not working. In this case, you can add an appropriate amount of lubricating oil and test again. If the housing becomes hot, it means the shock absorber is low on oil and should be filled up. Otherwise, it indicates that the shock absorber has failed.

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Gear Grinding in Reverse with Dual-Clutch Transmission?

Gear grinding in reverse with a dual-clutch transmission is abnormal. It is usually caused by the clutch failing to disengage properly. Hazards of severe gear grinding in transmission: Transmission gear grinding essentially refers to the hard metal-on-metal contact between two gears. The outcome is obvious - accelerated wear on the gear crown. After prolonged and frequent occurrences, the originally right-angled gear crown becomes rounded. This leads to incomplete engagement after shifting gears, making it prone to gear disengagement with slight vibrations. At this point, a major transmission overhaul becomes necessary. When clutch gear grinding commonly occurs: It often happens when gear shifting is attempted without complete clutch disengagement. This not only produces gear noise during shifting but also easily causes gear grinding. Additionally, if the transmission lubricant contains large impurities, such as long-term wear metal shavings, these particles can get caught between meshing gears during rotation, also leading to gear grinding.

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Is the engine noise louder after switching to Shell oil?

The reasons for louder engine noise after switching to Shell oil are as follows: Excessive oil: Many car owners mistakenly believe that more oil is better. This is a misconception. There is a standard for oil quantity. If too much is added, it creates greater resistance to crankshaft rotation, affecting power output and increasing fuel consumption. Increased oil entering the combustion chamber leads to significantly more carbon deposits, increased piston movement resistance, reduced engine power, and a higher chance of knocking. Severe carbon deposits: Oil becomes thinner with use, leading to more carbon deposits. When new oil is added, the engine may not immediately adapt to the new oil's viscosity, causing higher RPMs and louder engine noise.

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How to Check the Scores for Subject 1, Subject 2, and Subject 3 on 12123?

How Many Points Are Required for Annual Vehicle Inspection?

Why Should a New Car's Engine Be Washed?

Can a Differential Lock Be Installed Afterwards?

Do Motorcycle Shock Absorbers Need Lubrication?

Gear Grinding in Reverse with Dual-Clutch Transmission?

Is the engine noise louder after switching to Shell oil?

How to Adjust the High and Low Beams of a Volkswagen?

What is the fuel consumption of Dewei D30?

Is the Combination Switch Faulty if Both Headlights and Taillights Are Not Working?

Must a motorcycle be scrapped after 13 years?