Can Subject 4 be taken nationwide?

How to Know Which Gear You're In?

Methods to check which gear your car is in are as follows: 1. Primarily observe the tachometer and speedometer: The RPM on the tachometer should generally not exceed 2000 for optimal performance. Start in 1st gear, shift to 2nd when RPM reaches around 1800 and speed is approximately 10 km/h. Similarly for 2nd gear, shift to 3rd when speed exceeds 20 km/h. For gears beyond 3rd, monitor the RPM and shift when it reaches around 2000. The same applies for 4th and 5th gears. 2. Judge by the engine sound: When upshifting, change gears when the engine power is sufficient during driving, indicated by a relaxed engine sound. For downshifting, do the opposite – shift when the engine struggles during driving, noticeable by a heavy engine sound, requiring timely gear changes. In fact, when climbing steep slopes, don't wait until the engine can't handle it before shifting; anticipate slightly to ensure smooth driving.

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Why is there water leaking from the car chassis?

The main reason for water leaking from the car chassis is the absence of a water-draining hose at the bottom of the vehicle. After turning on the car's air conditioning, the condensed moisture can only be discharged directly from the chassis, resulting in the appearance of water leakage. Common damages to the car chassis include: scraping the bottom and impact from foreign objects: When roads are under repair, there are often large stones or uneven surfaces. If the car is driven on such roads, large stones or other protruding objects may come into direct contact with the vehicle's chassis if not careful. Corrosion: With the worsening environment, even the rain has become acid rain, increasing the likelihood of damage to the car under such conditions. Since the chassis frequently comes into contact with sewage, grease, and other substances, the chemical components in these materials can slowly corrode the chassis and its components. Therefore, extra attention should be paid to chassis anti-corrosion measures.

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Should the left side yield to the right side when changing lanes?

When changing lanes, the left side should yield to the right side, as stipulated in traffic regulations. Below are the relevant details: Regulations: According to Article 52 of the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China", when motor vehicles pass through an intersection without traffic signal control or traffic police command, and there are traffic signs or markings, the party with the right of way should proceed first; in the absence of traffic signs or markings, vehicles should stop and look before entering the intersection, yielding to vehicles coming from the right. Traffic Rules: When vehicles from both the left and right sides are changing lanes towards the center simultaneously, the left-side vehicle must yield to the right-side vehicle. This is a safety consideration, as a collision could impact the driver's side of the right-side vehicle, hence the left-side vehicle must yield to the right-side vehicle.

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What documents are needed for annual inspection of a car?

For the annual inspection of a car, you need to bring the original vehicle license, your ID card, and the original copy of the compulsory traffic insurance policy within the validity period. Electronic insurance policies need to be printed in advance. Below are the specific details about the annual inspection: Relevant regulations: According to the "Road Traffic Safety Law", passenger vehicles for commercial use must be inspected once a year within the first 5 years; after 5 years, they must be inspected every 6 months. Trucks and large or medium-sized non-commercial passenger vehicles must be inspected once a year within the first 10 years; after 10 years, they must be inspected every 6 months. Other provisions: Small and micro non-commercial passenger vehicles must be inspected once every 2 years within the first 6 years; after 6 years, they must be inspected once a year; after 15 years, they must be inspected every 6 months. After 20 years, from the 21st year onwards, they must be inspected 4 times a year. Therefore, the annual inspection of a vehicle can only be done in advance and cannot be delayed.

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How to proceed when the upper and lower traffic lights are inconsistent?

When the upper and lower traffic lights are inconsistent, you can make a judgment based on the traffic lights in other directions and proceed according to the passage time of the direction you need to travel. Below is relevant information about traffic signals: 1. Green light signal: The green light signal is a permission to proceed. According to the "Road Traffic Safety Law Implementation Regulations": When the green light is on, vehicles and pedestrians are permitted to proceed, but turning vehicles must not hinder the passage of straight-moving vehicles and pedestrians that have been given the right of way. 2. Yellow light signal: When the yellow light is on, vehicles that have already crossed the stop line may continue to proceed. The meaning of the yellow light signal is between the green light and red light signals, having both a prohibition and a permission aspect. When the yellow light is on, it warns drivers and pedestrians that the passage time is about to end and will soon switch to red; vehicles should stop behind the stop line, and pedestrians should not enter the crosswalk. 3. Red light signal: Prohibits further movement.

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What is the difference between transmission fluid and engine oil?

Transmission fluid and engine oil are not the same. Although both serve a lubricating function, these two fluids perform different roles. Differences: Engine oil is the lubricant for the engine system, possessing properties such as oxidation resistance, wear resistance, and corrosion prevention. Transmission fluid, on the other hand, is primarily used to keep the gear shift system clean and to extend the service life of internal transmission components. Due to the different structures and operating environments of the transmission and the engine, transmission fluid cannot be used as engine oil, nor can engine oil be used as transmission fluid. Functions of transmission fluid: Reduce friction and wear, control clutch friction and synchronizer performance; bear loads (low speed, high torque, and vibration loads), dissipate heat, reduce vibration and noise, and remove contaminants from gear meshing areas (cleaning function); prevent corrosion, pitting, and surface metal tearing, isolate metal surfaces, and prevent direct contact between metal surfaces.

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Can Subject 4 be taken nationwide?

How to Know Which Gear You're In?

Why is there water leaking from the car chassis?

Should the left side yield to the right side when changing lanes?

What documents are needed for annual inspection of a car?

How to proceed when the upper and lower traffic lights are inconsistent?

What is the difference between transmission fluid and engine oil?

Does Having Different Tires on the Left and Right Sides Affect the Car?

What to Do If the Wiper Arm Cannot Be Removed?

Where is the Lexus Handbrake Button Located?

Do I Need to Add Engine Break-in Protector for the First Maintenance of a New Car?