How to use turn signals when meeting on narrow roads or bridges in Subject 3?

What does dual-clutch transmission mean?

Dual-clutch transmission (DCT) operates with two sets of clutches working simultaneously, where one set manages the odd-numbered gears and the other controls the even-numbered gears. Commonly abbreviated as DCT due to its dual-clutch design, many people simply refer to it as a dual-clutch transmission. The clutch, positioned between the engine and the transmission, acts as a 'switch' for power transfer from the engine to the transmission. It is a transmission mechanism capable of both transmitting and cutting off power, primarily ensuring smooth vehicle starts, reducing impact loads on transmission gears during gear shifts, and preventing overload in the drivetrain. In conventional vehicles, gear shifts are achieved through the engagement and disengagement of the clutch, which temporarily interrupts power transmission during the transition.

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What Causes a Gasoline Engine to Shut Down When Overheated?

Gasoline engine shutdown due to overheating may be caused by excessively small valve clearance. The maintenance methods for automobile engines are as follows: 1. Use lubricating oil of appropriate quality grade: For gasoline engines, SD-SF grade gasoline engine oil should be selected based on the additional equipment of the intake and exhaust systems and usage conditions; for diesel engines, CB-CD grade diesel engine oil should be selected according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements. 2. Regularly change the oil and filter: The quality of any grade of lubricating oil will change during use. To avoid malfunctions, change the oil regularly according to usage conditions and maintain an appropriate oil level (generally up to the upper limit of the oil dipstick). 3. Maintain good crankcase ventilation: Most gasoline engines are now equipped with a PCV valve (Positive Crankcase Ventilation), but pollutants from blow-by gases can deposit around the PCV valve, potentially clogging it. Therefore, it is necessary to regularly clean the pollutants around the PCV valve. 4. Regularly clean the crankcase: During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder from component wear to form sludge. Therefore, the crankcase should be cleaned regularly to maintain cleanliness inside the engine.

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Can People with Complete Color Weakness Obtain a Driver's License?

People with complete color weakness can obtain a driver's license. The following precautions should be noted when taking the driver's license test: 1. Ensure ventilation: Open the car doors to let air circulate before getting in. During lunch breaks, training cars parked in the open can become extremely hot and stuffy. About 10 minutes before training, all doors should be opened to let the heat escape and allow air to flow freely. 2. Choose the right time: Select suitable times for driving practice. In summer, days are longer and nights shorter. Although the days are long, they can be unbearably hot. The recommended best times for practice are from 08:00 to 12:00 in the morning and from 17:00 to 21:00 in the evening (closing around 21:00). Firstly, the temperature is not as scorching as at noon, making it more bearable for learners. Secondly, working professionals may not have time during the day but can make use of the ample time in the evening. Lastly, practicing at night helps familiarize learners with using car lights, making it easier to handle the night driving test later. 3. Take breaks every 30 minutes: It's essential to prevent heatstroke during summer driving practice. The most important aspects are lowering body temperature and ensuring you remain alert while learning. Therefore, take a break in a shaded rest area every 30 minutes of practice. If you feel unwell during practice, inform the instructor immediately.

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How to Open the Engine Oil Tank Cap?

The method to open the engine oil tank cap is: rotate it 90 or 180 degrees clockwise or counterclockwise to open. Engine oil is referred to as the blood of the engine, and it plays a crucial role in the engine by lubricating, cleaning, sealing, and dissipating heat. Engine oil, motor oil, or engine lubricant is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers. The main functions of engine oil are to reduce friction and wear on moving parts, remove sludge (one of the functions of dispersants) and varnish (detergents) from the engine, neutralize acids produced from fuel and lubricant oxidation (detergents), improve the sealing of piston rings, and cool the engine by carrying away heat from moving parts.

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What is the function of carbon deposit removal additives?

Carbon deposit removal additives can better help gasoline burn more fully, while also improving atomization and saving fuel. They mainly compensate for the inherent quality issues of fuel, clean carbon deposits and other substances accumulated in the engine system over time, inhibit the formation of carbon deposits, reduce engine abnormalities caused by carbon deposits, and to some extent improve the octane number of the fuel. Fuel additives are basically divided into four categories: Cleaning type: When the vehicle obviously feels poor fuel supply or severe carbon deposits in areas such as valves and fuel injectors, this type of fuel additive can be appropriately selected. Maintenance type: The main function of this additive is to inhibit the formation of carbon deposits and ensure the normal operation of valves and fuel injectors. Octane number adjustment type: The octane number refers to the fuel's resistance to knocking. For example, 92-octane gasoline has an octane number of 92. This type of fuel additive is mainly used to improve the octane number of the fuel to some extent, enhance fuel quality, and at the same time, it can play a role in energy saving and emission reduction. Comprehensive type: This additive combines the characteristics of the above three products and is a technologically advanced fuel additive. Overall, fuel additives are helpful to a certain extent in preventing carbon deposit formation, cleaning carbon deposits in the vehicle, and improving fuel performance.

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What to Do If the Fuel Tank Cap Won't Close?

If the fuel tank cap won't close, it may be due to deformation of the cap or damage to the locking mechanism. The car owner should have it checked. If the cap is deformed, it needs to be replaced with a new one. If the locking mechanism is damaged, then the locking mechanism should be replaced. The fuel tank cap of a car usually has a locking mechanism to prevent fuel theft. The fuel tank cap refers to the box on the car used to store gasoline. It is square-shaped, made of stainless steel, and has excellent sealing. It has only a small circular opening, similar in size to a bottle cap, making it easy for storage. It is typically located at the rear of the car.

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How to use turn signals when meeting on narrow roads or bridges in Subject 3?

What does dual-clutch transmission mean?

What Causes a Gasoline Engine to Shut Down When Overheated?

Can People with Complete Color Weakness Obtain a Driver's License?

How to Open the Engine Oil Tank Cap?

What is the function of carbon deposit removal additives?

What to Do If the Fuel Tank Cap Won't Close?

Do I need to go to the DMV myself after buying a car from a 4S store?

What are the damages of slamming car doors?

What Documents Are Required for Point Deduction?

Can I Register a Car in Another City?