What does the term 'on-demand four-wheel drive' mean for four-wheel drive vehicles?

What is Diesel Exhaust Fluid (DEF)? What is its use for vehicles?

Diesel Exhaust Fluid (DEF) is an essential product for heavy-duty diesel vehicles to meet China's National IV emission standards. Below are relevant explanations: 1. Definition: DEF refers to an aqueous urea solution with a urea concentration of 32.5% and solvent being ultrapure water. The raw materials consist of specialized urea for vehicle use and purified water. 2. Function: To reduce nitrogen oxide emissions. It can be directly added to the vehicle's DEF tank or filled through a dispensing machine. Generally, filling up to 80% of the DEF tank capacity is sufficient. Using this product can effectively reduce nitrogen oxides and particulate matter in exhaust emissions, decrease air pollution from acidic gases, and improve air quality.

16

0

Share

Are Motors Afraid of Rain?

It is not recommended to park electric vehicles outdoors or charge them in rainy weather, as safety cannot be guaranteed. The following are the relevant reasons: 1. Reason one: The circuit in the hood area is something to pay attention to during daily use of electric vehicles. Generally, pure electric vehicles undergo waterproofing treatment, especially for the circuits inside the engine compartment cover. Simple rain exposure does not have a significant impact on the wiring, but it can affect the car's paint surface. When driving in the rain, try to prevent water from entering the interior of the car and avoid leaving it in the rain for too long. After exposure to rain, it is necessary to dry it promptly. 2. Reason two: When storing a pure electric vehicle in rainy weather, the vehicle's controller should be covered to prevent water ingress. Rainwater also has a certain impact on the car's paint surface. If conditions permit, it is advisable to park in an underground garage or cover the car with a car cover. If the electric vehicle has been exposed to water, the battery and connectors should be wiped clean to avoid short circuits during charging. 3. Reason three: When charging an electric vehicle in the rain, try to find a sheltered place. You can also use a rain cover for the electric vehicle charger. When in use, place the charger on a tray and use a bracket to support a waterproof cloth covering the charger, effectively preventing rain or water from splashing on the charger.

15

3

Share

How many points are deducted for crossing a single yellow line?

Crossing a single yellow line in a car generally results in a traffic penalty of 3 points deducted. Here are specific details about single yellow lines: 1. Function: Solid yellow lines are used to separate different lanes, typically painted in the center of the road. Roads with four or more lanes often use double solid yellow lines, while roads with fewer lanes use single solid yellow lines to minimize the space occupied by lane markings. Yellow dashed lines are usually set up on narrower roads, also to separate lanes in different directions, and overtaking or U-turns are allowed when safe. 2. Penalty: U-turns are not permitted at either single or double solid yellow lines. Making a U-turn in such areas constitutes a traffic violation of crossing a prohibited line, punishable by a fine and a deduction of 3 points. Additionally, U-turns are not allowed where signs prohibit them or on special roads like narrow lanes, curves, or tunnels. If a U-turn at a single yellow line causes a traffic accident, the driver will bear primary responsibility for the accident.

16

2

Share

Do 7-Seater Vehicles Still Require Body Markings in 2021?

According to the national traffic regulations, operational 7-seater vehicles must have markings sprayed on the body. Here are the specific details: 1. Overloading in 7-seater vehicles is a very serious issue: Major traffic accidents have occurred, and to enhance safety awareness, it is mandatory for these vehicles to display warning markings. This strengthens public supervision of van transportation, raises public awareness of traffic safety, and encourages the conscious rejection of illegal activities such as overloading, thereby reducing road traffic hazards. 2. Additional information: The 'marking service' provided by the vehicle management office charges a certain fee, with varying amounts.

16

4

Share

What is the powder in the three-way catalytic converter used for?

The catalyst in the three-way catalytic converter consists of rare metals such as palladium and rhodium, which accelerate the chemical reactions of harmful emissions. However, its normal operation requires high temperatures, which is why the exhaust smell is very strong after a cold start—the exhaust temperature is low, and the three-way catalyst cannot function effectively. Here is more information about the three-way catalytic converter: 1. Introduction: The three-way catalytic converter is the most important external purification device installed in the automotive exhaust system. It converts harmful gases such as CO, HC, and NOx emitted from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction. 2. Structure: The exterior of the three-way catalytic converter is made of double-layered stainless steel plates in a cylindrical shape. The interlayer between the double-layered plates contains insulating material, such as asbestos fiber felt. Inside, a purification agent is placed between mesh partitions. The purification agent consists of a carrier and a catalyst.

8

1

Share

How to Master the Reverse Parking in Subject 2 of the Driving Test?

Here are some tips for the reverse parking in Subject 2: 1. Keep an eye on the rearview mirrors: During reverse parking in Subject 2, always keep a close watch on both left and right rearview mirrors. If you notice one side is wider, slightly turn the steering wheel towards that side to prevent the other side from crossing the line. Also, remember that when initially determining the right moment to turn the steering wheel fully, do it decisively without hesitation. 2. Maintain the distance: While fully turning the steering wheel and reversing, the rear of the car gradually enters the parking space. Before fully entering, ensure the wheels are about 30cm away from the corner of the parking space. Continuously observe through the rearview mirrors, and make adjustments if the distance is less or more than 30cm, otherwise, you will definitely cross the line after parking.

10

2

Share

What does the term 'on-demand four-wheel drive' mean for four-wheel drive vehicles?

What is Diesel Exhaust Fluid (DEF)? What is its use for vehicles?

Are Motors Afraid of Rain?

How many points are deducted for crossing a single yellow line?

Do 7-Seater Vehicles Still Require Body Markings in 2021?

What is the powder in the three-way catalytic converter used for?

How to Master the Reverse Parking in Subject 2 of the Driving Test?

What is the name of the car with poor brakes?

What to Do If You Fail the Vision Test for Driver's License Physical Examination?

Automotive Parts and Accessories Manufacturing?

What is the car called when the brakes fail?