What is the passing score for the driving license subject four exam?

What are the reasons for the engine light on the dashboard?

The engine light on the dashboard indicates an engine malfunction, which can be caused by issues such as carbon buildup on the spark plugs or poor fuel quality. Carbon buildup on the spark plugs: After a period of use, the car engine accumulates carbon deposits, which can damage the engine, leading to difficulties in starting, poor acceleration, excessive engine noise, and other symptoms. At the same time, the engine fault light will illuminate. Solution: Soak the spark plugs in a container filled with white vinegar for 2-3 hours, or 4-5 hours for severe cases. Then, use a stiff brush to scrub off the carbon deposits. Clean them with gasoline, let them air dry naturally for some time, and they will be ready for use. Fuel quality issues: Poor or substandard fuel quality. Immediately after refueling, the engine fault light on the dashboard may illuminate, causing severe engine vibrations and increased noise. This is often due to filling up with low-quality fuel at unregulated gas stations. Solution: Switch to higher-quality fuel. If necessary, clean the fuel system.

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Is It Harmful to Keep the Car Running While Stationary?

Keeping the car running while stationary can cause damage to the vehicle. When the car remains stationary with the engine running, it enters an idle state. Idle operation refers to the engine running without load, meaning the clutch is engaged, and the transmission is in neutral (for automatic transmission vehicles, it should be in 'Park' or 'P' mode). Prolonged idling can lead to the following effects: 1. Engine temperature too low: Due to extended idling, the engine temperature remains too low, resulting in incomplete fuel combustion, which can cause carbon buildup, clogged fuel injectors, and severe carbon deposits. 2. Poor fuel atomization, leading to lubricant degradation: Unburned and poorly atomized oil can wash the cylinder walls and mix into the lubricant, diluting and degrading it. This can cause increased engine wear as moving parts do not receive adequate lubrication. 3. Emission of toxic gases: Poor engine combustion worsens exhaust emissions, releasing toxic gases. 4. Low oil pump speed: Idle speed being too low reduces the oil pump speed, lowering oil pressure and resulting in insufficient oil flow to lubrication points. 5. Difficulty in cooling high-temperature engine components: This can even lead to damage of the catalytic converter due to excessive heat.

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Is the Vehicle Identification Number Confidential?

The Vehicle Identification Number (VIN) does not need to be kept confidential. The VIN can be found on the driver's side under the front windshield, on the vehicle registration certificate, on various plates in the engine compartment, and on the driver's side door pillar. Here is some related information about the VIN: 1. Definition of VIN: The VIN, also known as the Vehicle Identification Number, is a unique 17-character alphanumeric code that serves as the car's identity. Each vehicle has its own unique VIN. 2. Composition of VIN: The letters and numbers in the VIN represent information such as the vehicle's production region, manufacturer, production year, model, etc.

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What is the principle of a tanker truck?

Utilizing the power of the tanker truck to drive an air compressor, compressed air is sent through pipelines into the air chamber at the lower part of the sealed tank body, suspending the powder particles on the liquidized bed into a fluidized state. When the pressure inside the tank reaches the rated value, the discharge valve is opened, and the fluidized material is transported through the pipelines. Below is an introduction to related content: Air Compressor: An air compressor is a device used to compress gases. The structure of an air compressor is similar to that of a water pump. Most air compressors are of the reciprocating piston type, rotary vane, or rotary screw. Centrifugal compressors are used for very large applications.

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How Long Can a China III Motorcycle Still Be Used?

How long a China III motorcycle can still be used depends on the current vehicle's service life. The maximum service life for two-wheeled motorcycles is 13 years, meaning that from the date of registration, China III motorcycles can be used normally within this 13-year period. As long as the China III motorcycle was purchased within the specified time frame, its later use will not be affected in any way, whether it's vehicle annual inspections or normal road use, there will be no restrictions. Additional information: 1. Introduction to motorcycles: Motorcycles are two or three-wheeled vehicles powered by gasoline engines, steered by handlebars for front-wheel turning. They are lightweight, flexible, fast, and widely used for patrols, passenger and cargo transport, as well as sports equipment. 2. Classification of motorcycles: Motorcycles are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, touring bikes, etc.

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What does AB pillar mean?

A-pillar, B-pillar, C-pillar, and D-pillar are all main components that support the structural strength of a vehicle. Here is a brief introduction about AB pillars: The A-pillar is the connecting pillar between the left front and right front that links the roof and the front compartment, located between the engine compartment and the cabin. The B-pillar is located between the front and rear seats of the cabin. Brief introduction of A-pillar: It is the connecting pillar between the left front and right front that links the roof and the front compartment, located between the engine compartment and the cabin, above the side mirrors. It may obstruct part of the turning view, especially when turning left. Generally, the overlapping angle of the driver's vision through the A-pillar is 5-6 degrees. From the driver's comfort perspective, the smaller this overlapping angle, the better, and the thinner the A-pillar, the better. However, designers need to find a balance. Clearly, they must ensure the high rigidity of the A-pillar to reduce safety risks. Therefore, from this perspective, the A-pillar is not the smaller the better. B-pillar: Located between the front and rear seats of the cabin, it is the longitudinal bar between the two side doors, extending from the roof to the bottom of the car. From the inside, the seat belt is attached to the B-pillar. C-pillar: Located on both sides of the rear seat headrest. The inclination angle of the C-pillar in sedans is usually larger, while in hatchbacks and SUVs, the C-pillar is relatively more upright. D-pillar: Commonly found in SUVs and MPVs, it is located at the connection between the rear roof and the body compartment.

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What is the passing score for the driving license subject four exam?

What are the reasons for the engine light on the dashboard?

Is It Harmful to Keep the Car Running While Stationary?

Is the Vehicle Identification Number Confidential?

What is the principle of a tanker truck?

How Long Can a China III Motorcycle Still Be Used?

What does AB pillar mean?

What Do the Symbols on the Dashboard Mean?

Are r415b and r134a interchangeable?

What is the emission level of the Volkswagen Bora?

What is the fault code for Kobelco Z010?