The Three Network Meanings of BMW?

Is it necessary to clock in consecutively for Subject 1? Can it be accumulated?

There are no requirements, but the medical assistance class is mandatory. Below are the precautions for the Subject 1 exam: 1. The exam must be taken within the specified time; delays will be considered as absence and result in failure. 2. The exam is generally divided into the first and second sessions; just attend according to the schedule, though the general principle is first come, first served. 3. After entering the exam room, no noise is allowed, no looking around, and maintain quietness. 4. A score of 90 is required to pass. After passing, you must sign before leaving. If you fail, you can retake the exam on the same day, following the staff's arrangements for another attempt. 5. In case of computer or equipment malfunction, signal immediately for staff to handle it; do not take matters into your own hands.

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How to Clean the Three-Way Catalytic Converter of a Heavy Truck?

The cleaning method for the three-way catalytic converter of a heavy truck is the intravenous drip method. This method involves connecting a plastic hose to the engine's vacuum solenoid valve and using the air pressure in the hollow tube to draw the cleaning agent from the infusion bottle into the engine. As the cleaning agent is expelled through the exhaust pipe, it cleans the three-way catalytic converter. Modern vehicles are all equipped with three-way catalytic converters. Only vehicles produced in earlier years that did not meet the National II emission standards lack a three-way catalytic converter. Composition of the Three-Way Catalytic Converter: The three-way catalytic converter generally consists of four parts: the shell, damping layer, substrate, and catalyst coating. The shell is made of stainless steel to prevent oxide scale from falling off, which could clog the substrate. The damping layer is composed of padding or wire mesh pads, which serve to seal, insulate, and secure the substrate. To protect the substrate from damage due to vibration, thermal deformation, and other factors, the padding is made of expanded mica and aluminum silicate fibers, bonded together with adhesive. The substrate is made of honeycomb-shaped ceramic material, though many also use metal (including stainless steel) materials. The catalyst consists of precious metals such as platinum, rhodium, and palladium, which are sprayed onto the substrate to form the purifying agent.

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Why Does the Car Horn Sound Change?

During rainy weather, it is easy for the horn to get wet from rainwater, leading to damage. When the horn does not sound, common fault locations are usually the horn itself, the horn switch contacts, or the horn wiring harness. The reasons for a change in horn sound are as follows: 1. Horn switch contacts: Sometimes, the horn switch does not activate. If the horn sometimes works and sometimes doesn’t, most of the time, the contacts inside the horn switch are not making good contact, and sometimes the issue lies with the horn itself. 2. Poor plug connection: A hoarse or distorted sound is mainly caused by poor plug connections, especially around the steering wheel where various contacts are frequently used and prone to wear. 3. Check the fuse: First, check if the fuse is blown. Then, unplug the horn and use a multimeter to measure whether there is power when the horn switch is pressed. If there is no power, inspect the horn wiring harness and relay; if there is power, the issue is with the horn itself.

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Is it necessary to go to a 4S shop for inspection after the vehicle wades through water?

If the vehicle can continue to drive after wading through water, it is not necessary to go to a 4S shop for inspection. However, you can go to a 4S shop for inspection for the safety of the car. The following is a detailed introduction about car safety: 1. Overview: Car safety is mainly divided into active safety and passive safety. Active safety is to control the car as freely as possible. Whether braking and accelerating in a straight line or turning left and right, it should be as smooth as possible, without deviating from the established route, and without affecting the driver's vision and comfort. 2. Others: The scope of car safety technology is becoming wider and more detailed, and it is developing in the direction of integration, intelligence, systematization, and full participation. Strictly controlling the speed during night driving is the fundamental measure to ensure safety.

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What does 38km/h mean?

38km/h means 38 kilometers per hour. Below are specific details about gear shifting: 1. Gears: Start in first gear, then shift to second gear after driving a few meters. Shift to third gear when the speed reaches above 20 mph but below 35 mph, shift to fourth gear when the speed reaches above 35 mph but below 45 mph, and shift to fifth gear when the speed exceeds 45 mph. 2. Precautions: While shifting gears, the clutch and throttle must be coordinated properly. Press the clutch pedal all the way down, then release the throttle pedal, and quickly shift to the corresponding gear. After shifting, immediately release your hand from the gear lever to avoid prolonged contact, which can easily damage the gear lever.

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What's the matter with the coolant bypass valve start open circuit?

You can replace the water pump assembly. The water seal is prone to aging and water ingress, which can easily cause motor damage and lead to the bypass valve start open circuit. If the valve body is not damaged, you can replace the small electric water pump connected to the coolant booster. Precautions for using automotive coolant: 1. Correct use of coolant: It can prevent corrosion, cavitation leakage, radiator boiling, scale formation, and freezing, keeping the cooling system in optimal working condition and ensuring the engine operates at normal temperature. 2. Note: If not used properly, it will seriously affect the normal performance and lifespan of the engine. 3. Continuity of coolant use: The idea of only using it in winter is wrong, as it only considers the antifreeze function of the coolant while neglecting its anti-corrosion, anti-boiling, and anti-scale effects.

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The Three Network Meanings of BMW?

Is it necessary to clock in consecutively for Subject 1? Can it be accumulated?

How to Clean the Three-Way Catalytic Converter of a Heavy Truck?

Why Does the Car Horn Sound Change?

Is it necessary to go to a 4S shop for inspection after the vehicle wades through water?

What does 38km/h mean?

What's the matter with the coolant bypass valve start open circuit?

How to Remove the Speed Limiter on a Heavy Truck?

How to Open the Front Panel of a Heavy Truck?

How to Obtain a Heavy Truck Driver's License?

Why does the 360-degree panoramic image not display when reversing?