Should You Shift Gear or Engage Handbrake First in an Automatic Transmission?

How Many Batteries Does the Little Tortoise King Have?

The Little Tortoise King electric scooter has 3 batteries with a 72V configuration. Overview of Automotive Batteries: A battery is a type of cell, also known as a storage battery, which works by converting chemical energy into electrical energy. Commonly referred to as lead-acid batteries, they primarily use lead and its oxides as electrodes and a sulfuric acid solution as the electrolyte. Working Principle of Automotive Batteries: The negative electrode is made of a lead plate filled with sponge lead, while the positive electrode is a lead plate filled with lead dioxide, using a 22–28% dilute sulfuric acid as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy. When discharging, metallic lead acts as the negative electrode, undergoing oxidation to form lead sulfate, while lead dioxide acts as the positive electrode, undergoing reduction to form lead sulfate. When charging with direct current, the two electrodes generate lead and lead dioxide, respectively. After removing the power source, it returns to its pre-discharge state, forming a chemical cell. Lead-acid batteries are rechargeable and dischargeable cells, known as secondary batteries. The voltage is 2V, and typically, three lead-acid batteries are connected in series to achieve 6V. Automotive applications use six lead-acid batteries connected in series to form a 12V battery pack. Regular lead-acid batteries require the addition of distilled water after some use to maintain the electrolyte at 22–28% dilute sulfuric acid.

13

4

Share

How Many Miles Can a Motorcycle Run?

Racing motorcycles can exceed 300 miles, while motorcycles used for scientific experiments (specifically designed for speed testing) can reach up to approximately 700 miles. The break-in mileage for a new motorcycle is around 1,600 kilometers. Identifying Mileage by Production Date: The odometer can "lie," but the production date won't. The vehicle's registration date can be checked through the engine number, chassis number, and license plate number from the public security department. Additionally, the production date of the vehicle can be found on the metal plate in the engine compartment. Altering these details is much more difficult compared to tampering with the odometer. Identifying Mileage by Car Tires: Under normal driving conditions, a tire's lifespan is about 40,000 kilometers. For a car that has traveled 20,000 kilometers, the tire tread should be worn down to approximately half its original depth. Conversely, if a car shows only 10,000 kilometers on the odometer but the tires are nearly bald, the mileage is likely falsified. Identifying Mileage by Interior: The car's interior can provide valuable clues about its "age." Through regular use, the steering wheel, gear shift, and buttons on the dashboard become smooth from repeated contact. A new car's interior, however, should feel rough and grainy. If a car with very low mileage has a polished interior, it's likely an older vehicle in disguise.

13

5

Share

What Causes a Clunking Sound When Shifting Gears in an Automatic Transmission?

Automatic transmission may produce a clunking sound when shifting gears due to issues such as generator gear problems, large cold engine valve clearance with poor lubrication, transmission failure, or shifting gears before the vehicle comes to a complete stop. Below is an introduction to the gears of an automatic transmission: 1. P (Park) Gear: This is the parking and starting gear. When engaged, the parking lock mechanism locks the transmission output shaft. 2. R (Reverse) Gear: This is the reverse gear. Engaging this gear connects the hydraulic system's reverse oil circuit, causing the drive wheels to rotate in reverse for backing up. Never force the gear into "R" when the vehicle is not completely stopped, as this may damage the transmission. 3. N (Neutral) Gear: This is the neutral gear. When engaged, the planetary gear system idles without power output. 4. D (Drive) Gear: This is the forward gear, also known as the driving gear. When the gear selector is in this position, the hydraulic control system automatically engages the appropriate forward gear based on throttle position and vehicle speed signals. It shifts up or down automatically as speed changes, enabling automatic transmission functionality. 5. S (Sport) Gear: This is the sport mode. When the gear selector is in this position, the transmission control module receives the driver's command, and the vehicle enters sport mode. The shifting logic becomes more aggressive, with more frequent gear changes, providing better control and throttle response for a more engaging driving experience.

20

2

Share

How Many Bottles of Antifreeze Are Needed to Replace It in a Car?

Replacing the antifreeze in a car requires about 5 bottles. Antifreeze prevents the coolant from freezing and cracking the radiator or damaging the engine cylinder block or head during cold winter parking. Before completely replacing the antifreeze, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with a focus on the five-way hose. The five-way hose gets its name from having five connecting interfaces to various parts. Antifreeze flows through the five-way hose and is distributed to different parts of the car to function. If there is any antifreeze leakage in this section, replace the hose or resecure the interface as needed. Drain the old antifreeze, then flush the liquid channels with clean water. Add clean water to the antifreeze reservoir, then continuously inject water into the reservoir to allow it to flow through the engine cooling system. Start the car and let it idle for 3 to 5 minutes to circulate the water. The water initially draining from the reservoir will have a faint pink color. Continue adding clean water until the outflowing water is clear. Remember to remove the heater hose and drain the water from the heater core. About an hour after draining, add the new antifreeze through the radiator hose to allow it to flow quickly into the radiator. Then, add another bottle of antifreeze to the antifreeze reservoir until it is nearly full. Start the car and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is expelled from the cooling system. Add more antifreeze until it reaches the "MAXT" mark on the reservoir.

11

3

Share

How Many Years of Driving License Can Be Replaced with a Long-Term Driving License?

During the ten-year validity period of the motor vehicle driving license, if no more than 12 points are recorded in each scoring cycle, the driving license can be replaced with a long-term valid one. If the license expires within one year, it can be renewed normally; if it expires between one and three years, the license will be canceled, but it can be renewed by passing the subject one exam; if it expires for more than three years, the license will be invalid and cannot be renewed. Renewal Period: The motor vehicle driver should apply for renewal at the vehicle management office where the driving license was issued within 90 days before the expiration of the driving license. When applying, the "Motor Vehicle Driving License Application Form" should be filled out. Renewal and inspection must meet the following conditions: Holders of large passenger vehicles, tractors, city buses, medium-sized passenger vehicles, or large truck driving licenses have no points recorded in the current scoring cycle, or holders of other permitted driving licenses have less than 12 points recorded in the current scoring cycle; Holders of large passenger vehicles, tractors, city buses, medium-sized passenger vehicles, or large truck driving licenses who have points recorded in a scoring cycle, as well as holders of other permitted driving licenses who have been involved in a traffic accident causing death and bear equal or greater responsibility but have not had their driving license revoked, have participated in the inspection education; The applicant has no pending road traffic safety violations or traffic accidents; The applicant's physical condition meets the driving permit requirements; The motor vehicle driving license is not seized, detained, temporarily suspended, revoked, canceled, or withdrawn by law. Renewal Materials: Bring two copies of ID card, two 1-inch color passport photos, original ID card, original driving license, and a medical examination certificate from a county-level or above hospital (free medical examination is also available at the vehicle management office).

17

0

Share

How Many Times Can You Take the Driving Test?

In the driving license examination, there is no limit to the number of times you can schedule the test for Subject 1 and Subject 4, and each test comes with two free retake opportunities. For Subject 2 and Subject 3, you can schedule the test up to 5 times, and each test also includes two free retake opportunities. Subject 1, also known as the theoretical driving test or driver theory test, allows you to take the test twice on the same day. If you fail the first attempt, you can take a free second retake. If you still fail the second attempt, the Subject 1 test is terminated, and you can only reschedule the test after 10 days. The test is scored out of 100, with a passing mark of 90, and is conducted via computer. Subject 2, commonly referred to as the 'small road test,' is the abbreviation for the field driving skills test. It mainly includes five items: reversing into a parking space, parallel parking, stopping and starting on a slope, turning at a right angle, and driving along a curve. The test is scored out of 100, with evaluation criteria for failing, deducting 20 points, deducting 10 points, or deducting 5 points. A score of 80 or above is required to pass. You can schedule Subject 2 up to five times, and each scheduled test comes with two attempts. If you fail all five tests, your previously passed scores will be invalidated, and you will need to re-register for the test. Subject 3, also known as the 'big road test,' is the road driving skills test. The test content includes: preparing to start, driving straight, changing lanes, passing through intersections, pulling over, crossing pedestrian crosswalks, passing through school zones, passing bus stops, meeting oncoming vehicles, overtaking, making U-turns, and driving at night. The test is scored out of 100, with a passing mark of 90 or above. You can schedule Subject 3 up to five times, and each scheduled test comes with two attempts. If you fail all five tests, your previously passed scores will be invalidated, and you will need to re-register for the test. Subject 4, also known as the theoretical driving test or driver theory test, mainly covers: safe and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-accident handling knowledge. The test is scored out of 100, with a passing mark of 90. There is no limit to the number of times you can take Subject 4 within the validity period of your driving test certificate.

14

1

Share

Should You Shift Gear or Engage Handbrake First in an Automatic Transmission?

How Many Batteries Does the Little Tortoise King Have?

How Many Miles Can a Motorcycle Run?

What Causes a Clunking Sound When Shifting Gears in an Automatic Transmission?

How Many Bottles of Antifreeze Are Needed to Replace It in a Car?

How Many Years of Driving License Can Be Replaced with a Long-Term Driving License?

How Many Times Can You Take the Driving Test?

How to Reset the Maintenance Light on a 2021 Honda CR-V?

How often should the engine oil be changed for a new scooter?

How much engine oil should be added to the Xiaoxunlong 150?

What does the yellow light on the rearview mirror mean?