What are the methods for cleaning combustion chamber carbon deposits?

What Does Incorrect Use of Brake and Accelerator Pedals Mean?

Incorrect use of brake and accelerator pedals refers to not stepping on the brake when deceleration is required or mistakenly stepping on the accelerator, or not stepping on the accelerator when acceleration is needed or mistakenly stepping on the brake. Incorrect use of brake and accelerator pedals results in an immediate deduction of 100 points, leading to a direct failure. Additional information is as follows: 1. Starting in Subject 3: Upon hearing the voice prompt 'Please start,' depress the clutch, shift into first gear, turn on the left turn signal (for more than 3 seconds), simultaneously (turn head left) observe the left rearview mirror, confirm safety, sound the horn, release the parking brake, start smoothly, and straighten the turn signal. 2. Examination Conditions: According to Article 44 of the 'Regulations on the Application and Use of Motor Vehicle Driver's Licenses,' each subject is examined once. If the examination is failed, a retake is allowed once. If the retake is not attended or still results in failure, the examination is terminated, and the applicant must reschedule the examination. However, Subject 2 and Subject 3 examinations must be scheduled at least ten days later. If the Subject 3 safety and civilized driving knowledge test is failed, the passed road driving skill test scores remain valid.

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Should You Release the Handbrake or Shift to First Gear First in Subject Two?

In Subject Two, you should shift to gear before releasing the handbrake. This is because the road surface when the vehicle is parked is not completely flat and may have a slope. If you release the handbrake before shifting to gear, the vehicle may roll backward. Below are the relevant details: 1. Starting Gear Control: Whenever the vehicle moves from a stationary position, the gear should remain in first. 2. Sequential Gear Shifting: Skipping gears during the Subject Two test is strictly prohibited. Gear changes must be sequential, such as from first to second gear or second to third gear. Otherwise, the test recorder will log it and deduct corresponding points. If you mistakenly shift to the wrong gear, immediately return the gear to the correct position and shift again. 3. Stable Gear Shifting: When shifting gears, the clutch must be fully depressed, and gear changes should only occur within a certain speed range. 4. Driving Speed: Master the key points of steering and turn at the right time. Control the driving route well—the vehicle's path mainly depends on the speed of steering wheel rotation and driving speed. When reversing, accurately observe the side lines and promptly adjust the direction to ensure the vehicle enters the garage straight.

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How many days of study are required before taking the Subject 2 test?

Subject 2 generally requires 12-22 days of study before taking the test. In driving schools, for C1/C2 driver's license training, the theoretical study time for Subject 2 must reach 2 hours, and the practical training time must reach 22 hours before the test can be taken. Below is relevant information about Subject 2: 1. Test content: Subject 2, also known as the small road test, is part of the motor vehicle driver's license assessment, referred to as the field driving skill test. The test items for C1/C2 vehicles include five mandatory tests: reversing into a garage, parallel parking, stopping and starting on a slope, turning at a right angle, and driving on a curved path. 2. Test objectives: Master the basic driving operation essentials and possess the fundamental ability to control the vehicle; proficiently master the basic methods of field and on-site road driving, possess the ability to reasonably use vehicle operating components and correctly control the spatial position of the vehicle, and be able to accurately control the vehicle's driving position, speed, and route.

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What Causes Low-Speed Vehicle Body Shaking?

Low-speed vehicle body shaking is primarily caused by the accumulation of carbon deposits in areas such as the throttle body, intake tract, and valves. When the engine is cold, these deposits absorb some gasoline. As the engine warms up, the gasoline evaporates, leading to an overly rich air-fuel mixture during idle, which results in low-speed shaking. Throttle maintenance methods: 1. Release gases: Engine oil volatilizes under heat during use. The longer the usage period and the higher the temperature, the stronger the volatilization. Additionally, some compressed gas from the cylinder will inevitably squeeze into the crankcase through the piston ring gaps. Therefore, there must be a passage to release these gases; otherwise, the oil pan will develop positive pressure. 2. Negative pressure extraction: The reason the crankcase ventilation tube connects to the throttle body is partly due to environmental requirements and partly to utilize the intake's negative pressure to extract gases from the crankcase. When oil vapor reaches the intake pipe, it cools down, causing the oil to condense on the intake tract and throttle body. The carbon deposits mixed in the vapor will also deposit in these areas. Since the throttle opening has the highest airflow rate, a small space, and lower gas temperature, this part is most prone to condensation.

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What are the differences between the 2021 facelift and the 2021 model of the BMW X1?

The difference between the 2020 and 2021 models of the BMW X1 lies in their configurations. Below is more information about the BMW X1: 1. Configuration: The 2020 BMW X1 is equipped with rear radar and a multi-color ambient interior light, while the 2021 model features front and rear radar and a 6-color ambient interior light. 2. Body dimensions and power: The 2020 BMW X1 measures 4565mm in length, 1821mm in width, and 1620mm in height, with a wheelbase of 2780mm. It is equipped with a 7-speed dual-clutch transmission. The 2020 BMW X1 has a top speed of 195 km/h, a maximum horsepower of 140, and a maximum torque of 220 Nm. It features front-wheel drive and tire specifications of 225/50R18.

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Can Antifreeze Be Mixed for Use?

Antifreeze cannot be mixed for use. It is necessary to use the same brand of antifreeze. The production formulas of antifreeze from different brands may vary, and if mixed, chemical reactions are likely to occur among the various additives, rendering them ineffective. Methods for selecting antifreeze: The basic indicators of antifreeze are the freezing point and boiling point. The market offers antifreeze with freezing points of -15°C, -25°C, -30°C, -40°C, etc. Generally, it is advisable to choose one that is at least 10°C lower than the lowest temperature in your region. Methods to determine if antifreeze is lacking: Observe the antifreeze warning light on the dashboard. If it lights up, it is likely due to a lack of antifreeze, although it could also be caused by excessively high temperatures within the cylinder. Check the antifreeze reservoir. If the liquid level is below the minimum mark (MIN), do not continue driving; add antifreeze promptly. Check the water level scale mark on the antifreeze bottle. Normally, antifreeze should be between the maximum and minimum water levels. Whether antifreeze is lacking depends on the scale. If the antifreeze level is below the minimum mark, it indicates a shortage of antifreeze.

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What are the methods for cleaning combustion chamber carbon deposits?

What Does Incorrect Use of Brake and Accelerator Pedals Mean?

Should You Release the Handbrake or Shift to First Gear First in Subject Two?

How many days of study are required before taking the Subject 2 test?

What Causes Low-Speed Vehicle Body Shaking?

What are the differences between the 2021 facelift and the 2021 model of the BMW X1?

Can Antifreeze Be Mixed for Use?

Why does BYD DM-i not have a transmission?

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Is the Accelerator Used in Subject 2?

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