What does DM mean on a car?

What are the test items for C1 License Subject 3?

The C1 driver's license Subject 3 test includes: vehicle preparation, starting, driving straight, gear shifting operations, lane changing, pulling over, going straight through intersections, turning left at intersections, turning right at intersections, passing pedestrian crossings, passing school zones, passing bus stops, meeting oncoming vehicles, overtaking, making U-turns, and nighttime driving. According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses," the scope of vehicles that can be driven with a C1 license includes: small and micro passenger vehicles with a total mass not exceeding 4.5 tons; light and micro cargo vehicles, with the total length of the cargo vehicle not exceeding 6 meters; light, small, and micro special-purpose vehicles; small passenger vehicles with a seating capacity of 9 or fewer people, meaning vehicles with 9 seats or more cannot be driven. A C1 license also allows driving vehicles covered by C2, C3, and C4 licenses. Precautions for the C1 Subject 3 test are as follows: Pre-test preparation: Walk around the vehicle once before getting in, and pause near the monitoring area. Light simulation: Check if the light switches are reset before the simulation test begins. Starting: Always observe the surrounding traffic environment before starting. During driving: Keep your eyes on the road ahead and avoid following too closely. Details of the penalty points for the C1 driver's license Subject 3 test are as follows: Failing to observe the rear and right-side traffic conditions through the interior and exterior rearview mirrors before stopping results in disqualification. Failing to stop within the specified distance after the examiner issues the pull-over instruction results in disqualification. After stopping, if the vehicle body exceeds the right edge of the road or the sidewalk edge, it results in disqualification. After stopping, failing to turn your head to observe the side rear and left traffic conditions before opening the door results in disqualification. Failing to use or incorrectly using the turn signal before stopping deducts 10 points. Turning the steering wheel less than 3 seconds after activating the turn signal before stopping deducts 10 points. After stopping, if the vehicle body is more than 30 cm away from the right edge of the road or the sidewalk edge, it deducts 10 points. Failing to fully engage the parking brake lever after stopping deducts 10 points. Releasing the foot brake pedal before fully engaging the parking brake lever deducts 10 points. Failing to turn off the engine before getting out of the vehicle deducts 5 points.

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What is the firing order of a four-cylinder engine?

The movement sequence of the four pistons is identical for cylinders one and four, and for cylinders two and three. That is, when piston one moves downward for intake, cylinder four is definitely in the power stroke. Simultaneously, pistons in cylinders two and three move upward, with one compressing and the other exhausting. This pattern continues cyclically. Concept of a four-cylinder engine: A four-cylinder engine, also known as a four-cylinder motor, is a machine capable of converting one form of energy into another more useful form. Typically, it transforms chemical energy into mechanical energy. Sometimes, the term 'engine' refers both to the power generation device and the entire machine including the power unit, such as gasoline engines or aircraft engines. The main component of the engine is the cylinder, which serves as the power source of the entire vehicle. Principle of a four-cylinder engine: The fundamental principle of a four-cylinder engine involves converting the thermal energy of gasoline (or diesel) into mechanical energy by pushing the pistons to perform work through the combustion and expansion of gases within sealed cylinders.

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At what voltage is a 60V battery considered undercharged?

60V battery is considered undercharged at 52V. Methods to determine undercharge: You can check through the battery charge indicator (plastic round hole style) on top of the car battery. When the liquid appears green through the indicator, it means the battery is fully charged or in good condition; when the liquid appears black, it indicates insufficient charge, reminding users to perform charging maintenance; when the liquid appears transparent or light yellow, it means the battery has very little charge left or has reached its lifespan limit. At this point, the battery can hardly be restored to normal condition through charging, and a new battery replacement is necessary. Hazards of undercharge: If a car battery remains undercharged for a long time, the most direct damage is excessive carbon buildup in the engine, leading to a significant drop in power.

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How Long Does It Take to Obtain a Motorcycle License?

Generally, it takes about one month to obtain a motorcycle license. Unlike the ABC class driver's licenses, all subjects of the motorcycle license test can be completed on the same day. Documents required for the motorcycle license test: Local residents need to provide their ID card and 8 one-inch bareheaded white-background photos. Non-local residents also need to provide a temporary residence permit. Those applying for a motorcycle license upgrade must additionally submit their original driver's license. Age requirements for the motorcycle license test: Applicants for a light motorcycle license must be between 18 and 70 years old. Applicants for a regular three-wheeled motorcycle or a regular two-wheeled motorcycle must be between 18 and 60 years old.

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Where is the motor vehicle QR code located on the car?

The standard vehicle QR code is typically found on the accompanying vehicle configuration sheet, which usually contains detailed specifications of the vehicle. QR code content: The vehicle QR code includes information such as the issuing authority, unique serial number, license plate number, and other identification details. It also contains the vehicle's technical parameters and owner information, which can only be scanned by specialized systems used internally by traffic police. QR code management applications: It is used for managing vehicle-related information, safety, inspections, approvals, and other administrative aspects. As a means of transportation, vehicles and their drivers are constantly in dynamic motion through time and space.

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What are the functions of a mechanical transmission system in automobiles?

The functions of a mechanical transmission system in automobiles include: power transmission, changing the transmission ratio, and deceleration. The specific introductions are as follows: Clutch: It can cut off or engage the engine power transmission, serving the following three purposes: ensuring smooth vehicle starting; ensuring smooth operation during gear shifting; preventing transmission system overload. Transmission: Changing the transmission ratio to expand the range of torque and speed variation of the driving wheels, adapting to frequently changing driving conditions, and enabling the engine to operate under favorable conditions (higher power and lower fuel consumption rate). Under the premise that the engine rotation direction remains unchanged, it allows the vehicle to reverse. Reducer: Reducing speed and increasing torque; changing the direction of power transmission (power is transmitted longitudinally and then transferred laterally to the driving wheels through the main reducer).

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What does DM mean on a car?

What are the test items for C1 License Subject 3?

What is the firing order of a four-cylinder engine?

At what voltage is a 60V battery considered undercharged?

How Long Does It Take to Obtain a Motorcycle License?

Where is the motor vehicle QR code located on the car?

What are the functions of a mechanical transmission system in automobiles?

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What is the speed range for 2nd gear?

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