How to Start a Sagitar When the Key Fob Battery is Dead?

Can I make an appointment immediately after canceling Subject 1?

After canceling the appointment for Subject 1, you can immediately make another appointment. Each student has three opportunities to cancel appointments for each subject, so canceling in advance is a legitimate and reasonable operation and will not affect subsequent exam appointments. The content of the Subject 1 exam includes basic knowledge of motor vehicles; laws, regulations, and road traffic signals; basic knowledge of safe driving and civilized driving; and basic knowledge related to motor vehicle driving operations. The process for the Subject 1 exam is as follows: First, follow the staff's arrangements to receive your driving training file in order in the waiting area; carry and present your ID card for inspection by the supervising officer. Note that mobile phones must be turned off when entering the exam area, no loud noise is allowed, and law textbooks are not permitted in the exam area (or must be kept in your bag). After the exam, keep your ID card safe and submit the file to the "Document Submission Window" at the front of the exam room. Students who pass the exam will sign under the guidance of the staff at the exit before leaving the exam room. Students who fail the exam can leave the exam room immediately and wait for notification from their driving school staff about the retake time.

18

2

Share

Is 92 Octane Gasoline Lead-Free?

Currently, all gasoline sold in the market is lead-free, with octane ratings such as 92, 95, and 98. Understanding Gasoline Octane Ratings: The primary difference between gasoline with different octane ratings lies in their anti-knock performance, which is a crucial indicator for evaluating fuel quality. 92 octane gasoline has an octane rating of 92 and is suitable for mid-range vehicles (with relatively low compression ratios). 95 octane gasoline consists of 95% isooctane and 5% n-heptane, and high-octane gasoline should be used when the engine has a high compression ratio. 98 octane gasoline has an octane rating equivalent to a mixture of 98% isooctane and 2% n-heptane. The advantages of 98 octane gasoline are 'two highs and two lows': higher anti-knock performance and power output, along with lower harmful substances in the gasoline and reduced exhaust pollution. Precautions for Refueling: Do not arbitrarily switch to a different octane rating. Switching to a lower octane rating may cause premature combustion of the gasoline, leading to engine knocking. Additionally, incomplete combustion of the gasoline can result in increased carbon deposits, which may clog the fuel lines and injectors, leading to reduced vehicle power and increased fuel consumption.

10

3

Share

What Causes Occasional Gasoline Smell When Using Air Conditioning in the Car?

Possible reasons for gasoline smell inside the car: Carbon canister rubber hose aging: This issue commonly occurs in older vehicles. Even the highest-quality rubber hoses in the engine compartment can deteriorate over time. Once aged, gasoline may leak into the engine compartment, allowing the air conditioning system to draw the odor into the cabin. Therefore, aged rubber hoses should be replaced promptly. Gasoline pipe joint leakage: Leaks sometimes occur at gasoline pipe joints, potentially allowing gasoline fumes to enter the cabin through the air conditioning system. If you detect gasoline smell in the car, inspect the gasoline pipe connections. This is easily visible upon opening the engine compartment cover, as prolonged leakage will form a layer of greasy residue on the surface. Recent fuel pump maintenance: If the fuel pump has been replaced or removed for repairs, residual substances left uncleaned after reassembly may cause gasoline odor. In such cases, simply verify proper fuel pump installation and clean any surrounding residues.

20

1

Share

What does a displacement of 500 mean?

A displacement of 500CC means that the engine's displacement (cylinder volume) of the vehicle is 500CC, which is equivalent to a 0.5-liter car. Automobile Displacement: Displacement refers to the exhaust volume. The working volume of a cylinder is the volume swept by the piston from the top dead center to the bottom dead center, also known as the single-cylinder displacement. It depends on the cylinder bore and piston stroke. The engine displacement is the sum of the working volumes of all cylinders, usually expressed in liters (L). Displacement Classification: In China, the classification of passenger cars is determined by the size of the displacement. The displacement of a micro car is less than or equal to 1.0L; the displacement of an ordinary car ranges from 1.0 to 1.6L; the displacement of an intermediate car ranges from 1.6 to 2.5L; the displacement of a mid-to-high-end car ranges from 2.5 to 4.0L; and the displacement of a high-end car is greater than 4.0L.

2

1

Share

Why does a new car feel bumpy when driving?

The reasons why a new car feels bumpy when driving are as follows: Suspension system failure: In the suspension system, the absorption of bumps mainly relies on springs, while the hydraulic shock absorber's role is to reduce the number of repeated extensions when the spring absorbs vibrations, thereby greatly improving the vehicle's smoothness. When the hydraulic shock absorber fails, the repeated extension of the spring will not be suppressed, causing the vehicle to bounce up and down and resulting in a bumpy feeling. Oil leakage and pressure loss in the shock absorber, dust accumulation increasing resistance, and deformation of the shock absorber rod can all lead to hydraulic shock absorber failure. Tire imbalance: A tire is usually composed of a steel rim and a rubber tire. Due to material and processing reasons, the mass of the steel rim and rubber tire is not uniform, which can cause severe shaking when rotating at high speeds, resulting in a bumpy feeling. Incorrect wheel alignment: Wheel alignment refers to the toe angle, camber angle, as well as the caster angle and kingpin inclination angle of the wheels. When a new car leaves the factory, these angles are already set. However, as the mileage increases and the suspension is repeatedly stressed, these angles can change slightly. When these angles change, the tire's contact surface and the vehicle's thrust line may also change, leading to a bumpy feeling when driving on flat roads.

1

Share

How to Handle Emergencies on the Highway?

Here's how to handle emergencies on the highway: 1. Situation One: Tire Blowout: If a tire suddenly blows out while driving on the highway, especially a front tire, it can easily cause the vehicle to lose control and overturn. When a tire blows out, the vehicle body quickly tilts, and the steering wheel turns sharply toward the side of the blown-out tire. At this point, the driver must remain calm and avoid emergency braking. Instead, they should firmly control the steering wheel, release the accelerator pedal, try to keep the vehicle moving straight forward, and quickly shift to a lower gear to use engine braking to slow down the vehicle. Before engine braking effectively controls the speed, avoid risky braking to stop, as this could cause the vehicle to skid sideways and lead to greater danger. If the front tire blowout has already caused steering issues, the driver should not overcorrect. Instead, they should lightly press the brake pedal while maintaining control of the direction to slow the vehicle gradually. 2. Situation Two: Loss of Steering Control: If the steering mechanism suddenly fails, making it impossible for the driver to control the direction, the consequences can be extremely dangerous. In case of steering failure, stay calm, assess the severity of the situation, and slow down as quickly as possible. While applying braking measures, ensure to communicate the danger to other vehicles and pedestrians on the road to alert them to avoid the vehicle. At higher speeds, avoid emergency braking to reduce speed, as this can cause the vehicle to skid or even overturn.

6

0

Share

How to Start a Sagitar When the Key Fob Battery is Dead?

Can I make an appointment immediately after canceling Subject 1?

Is 92 Octane Gasoline Lead-Free?

What Causes Occasional Gasoline Smell When Using Air Conditioning in the Car?

What does a displacement of 500 mean?

Why does a new car feel bumpy when driving?

How to Handle Emergencies on the Highway?

Is Waxing Good for Cars?

What is the Difference Between All-Season Tires and Regular Tires?

How to Replace the Headlight Bulb of Lavida?

How to Brake Smoothly While Driving?