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What is the main function of seat belts?

1 Answers
LaLucy
07/30/25 12:21am
Seat belts mainly serve the following purposes: 1. In emergency situations, they can quickly tighten and restrain the occupant in the seat to ensure safety; 2. They can reduce injuries to drivers and passengers. Seat belts have become a primary consideration for drivers and passengers, and are also one of the important performance features of a car. Traditional components that ensure safe driving include: rearview mirrors and side door mirrors (traditional rearview systems), seat belts, AIRBAG (airbags), and ABS (Anti-lock Braking System). These have become familiar to most drivers and passengers and are widely used in imported luxury cars.
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Which is more fuel-efficient, 1.5T or 2.0L cars?

1.5T models are more fuel-efficient. From a fuel consumption perspective, turbocharged engines (marked with T) increase air intake and correspondingly require more fuel injection compared to naturally aspirated engines of the same displacement (1.5L). Although gasoline burns more completely, the fuel consumption is still lower than that of 2.0L engines. Therefore, 1.5T engines are more fuel-efficient than 2.0L ones. Differences between 1.5T and 2.0L cars: Different engines: T stands for turbocharged engine, 1.5 indicates the displacement, so 1.5T means a 1.5-liter turbocharged engine. 2.0L refers to a naturally aspirated engine with a two-liter displacement. Different performance: The 1.5T engine can increase air intake, providing more power compared to a 1.5L engine. However, during the initial acceleration phase, the vehicle relies on the power output from its own displacement, and the turbocharger's effect is not evident. Generally, the turbocharger only starts to work when the engine speed reaches 1,500 rpm after starting, at which point the vehicle's enhanced power becomes noticeable. The 2.0L engine relies solely on its own displacement for power output. It generates the vehicle's driving force through normal gasoline combustion. These engines experience less wear, are relatively cheaper to maintain, and have a longer service life. However, their power output is comparatively weaker.
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What is a Driving School File?

Driving school file refers to the archival materials required when applying for a motor vehicle driver's license. Below are specific details about driving school files: 1. Content: It includes the applicant's ID card copy, medical condition certification information for motor vehicle drivers, as well as study duration and test scores of relevant subjects for the driver's license. The driving school file is kept by the driving school and will later be submitted to the vehicle management office. The driver's license file serves as proof of the entire learning process from start to finish and is highly useful. Without a file, one cannot schedule a driver's license test. The driver's license file records the scores of each subject, registration information, and medical examination details. 2. Types: There are two types—one is the electronic file at the vehicle management office, and the other is the paper file temporarily stored by the driving school.
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Which foot should be used to press the brake?

The brake should be pressed with the right foot. Below is an introduction about brakes: 1. Definition: As the name suggests, it is a mechanical braking device that can slow down the vehicle, also known as a decelerator. 2. Application: Simply put, the car brake pedal is located below the steering wheel. Pressing the brake pedal causes the brake linkage to be pressurized and transmitted to the brake pads on the brake drum, which then clamp the brake disc, slowing down or stopping the vehicle. 3. Types: The manual brake in a car is located next to the gear shift and is connected to the brake lever. Another common type is the bicycle brake, which slows down the bike using rod-shaped brakes fixed to the frame or disc brakes.
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How many speeds does the Sylphy Classic automatic transmission have?

The Sylphy Classic automatic transmission is a 4-speed automatic. Below is some related information about the Sylphy: 1. Introduction: The Sylphy is a mid-size sedan under Dongfeng Motor Co., Ltd., and is one of the most typical mainstream family cars in the Chinese market (alongside models like the Octavia PRO, Sagitar, Lavida, Corolla, and Bora). 2. Smart Features: The new car is equipped with the latest Nissan Connect super-smart system, featuring an 8-inch HD capacitive touchscreen. It includes functions such as voice control for the vehicle and remote vehicle control. Voice control allows for simple commands to operate the online entertainment system, real-time navigation, Bluetooth calls, dashcam, and air conditioning. The remote monitoring and control function enables seamless connectivity between the smart app and your phone, keeping you fully informed about your vehicle's status and allowing remote control of door locks, lights & horn, engine, and air conditioning based on specific needs.
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How Many Kilometers Should Manual Transmission Fluid Be Changed?

Manufacturers recommend changing it every 2-3 years or 40,000-60,000 kilometers. Here are the relevant details: 1. Manual transmission vehicles: Cars that use manual shift mechanical transmissions (also known as manual transmissions, MT) to adjust speed. This means the driver must manually move the gear lever to change the gear engagement position inside the transmission, altering the gear ratio to achieve speed changes. The gear lever can only be moved when the clutch is depressed. 2. Transmission: A device that changes the speed ratio and direction of motion. Used in automobiles, tractors, ships, machine tools, and various machines to alter the torque, speed, and direction of motion transmitted from the driving shaft to the driven shaft under different working conditions. Gear-driven transmissions generally consist of a housing and several gear pairs.
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What to Do If Late for Subject 4 Exam?

If you are late for the Subject 4 exam, you can apply to be rescheduled to the next group. Here are specific details about Subject 4: 1. Definition: Subject 4, also known as the Subject 4 theory test or driver theory test, is part of the motor vehicle driver's license assessment. After the implementation of the "Ministry of Public Security Order No. 139 of the People's Republic of China," the Subject 3 exam was divided into two parts: the road test and an additional safety and civilization knowledge test, commonly referred to as "Subject 4," which evaluates "driving ethics." 2. Regulations: The exam consists of 50 questions, primarily in the form of case studies, images, and animations, with a full score of 100 and a passing score of 90.
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