How many items are there in the A2 driving test?

What are the normal high and low pressures for a car air conditioner?

For a car air conditioner, the normal high pressure should be between 1.3-1.7MPa, and the normal low pressure should range from 0.1-0.25MPa. Below are the relevant details: Variables: The high and low pressures of a car air conditioner compressor are variables. Influencing factors: They are closely related to working conditions such as the type of compressor, the type of refrigerant, the actual evaporation temperature, compressor speed, condenser structure and condenser fan speed, expansion valve opening, evaporator structure and evaporator fan speed, interior temperature, exterior temperature, engine temperature, and vehicle speed.

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What Causes the Failure of Car Power Window Switches?

Car power window switch failure can be caused by aging and deformation of the glass sealing strip, dirt or foreign objects in the window lifting guide rail, motor malfunction, low battery power, or window regulator failure. Issues with the glass sealing strip: Aging, excessive dirt, or deformation of the glass sealing strip (including inner trim strips) can create resistance when raising or lowering the window. Generally, if the strip is aged or deformed, it is best to replace it with a new one, or simply clean it. Solution: Spray some dashboard wax or apply talcum powder (for lubrication) on the glass sealing strip, which usually yields good results. Dirty window lifting guide rail: If the window lifting guide rail is too dirty, it can also cause lubrication issues. Solution: Clean the window lifting guide rail and apply lubricating grease to eliminate the problem. Low battery power may also lead to difficulty or failure in window operation. When raising or lowering the window with the engine off, the power is drawn from the battery. If the battery is low on charge, window operation may become difficult. Window regulator failure: Window regulator malfunction, improper glass sealing strip, including guide rail failure, cable failure, or slider failure, etc. Solution: The only remedy is to replace the window regulator.

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What is the appropriate heat insulation rate for car window films?

High-quality explosion-proof and heat-insulating car window films available on the market generally have a heat insulation rate of over 50%, with some reaching up to 70%. Here is some information about heat-insulating films: Data: Creating a more comfortable driving environment. Tests by authoritative institutions show that after installing professional explosion-proof heat-insulating films, the average interior temperature decreases by 5 degrees Celsius, the dashboard temperature drops by 10 degrees Celsius, and the cooling time inside the car is reduced by 19%, making driving more comfortable and also reducing energy consumption. Function: After applying professional explosion-proof heat-insulating films, they can effectively block heat sources and thermal conduction, improve air conditioning efficiency, reduce fuel consumption, and save an average of about 3% of the car's energy.

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Can car wash shops inflate tires?

Generally, most car shops can provide inflation services, but it's better to go to a professional tire shop for inflation as the air pressure will be more accurate. Many car wash shops have inaccurate pressure gauges. Below is some information about car tire pressure: Introduction: Tire pressure, strictly speaking, refers to the air pressure inside the tire. High tire pressure: This reduces the contact area between the tire and the ground, leading to poorer tire grip, longer braking distances, and compromised driving safety. Low tire pressure: This causes excessive wear on certain parts of the tire, shortening its lifespan, and can easily lead to bending and breaking of the tire sidewall, resulting in a blowout accident.

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Does Water Entering the Car Cabin Floor Have a Significant Impact on the Vehicle?

It generally does not cause significant damage to the vehicle. The worst-case scenario is water penetrating the electrical circuits, fuel lines, or air systems, which could harm the engine. Below is relevant information about water-damaged vehicles: Concept: A water-damaged vehicle refers to one that has been submerged in water, typically involving the engine or transmission being soaked, with water levels exceeding the wheels and seats, and prolonged contact between the vehicle's underbody components and water. Such vehicles pose high risks, as the electrical circuits are prone to short circuits and even fires. Insurance: There are two types of insurance related to water damage in vehicles. One is the most common comprehensive car insurance, and the other is called special engine loss insurance, commonly known as water damage insurance.

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Does a Weak Battery Affect Power and Fuel Consumption?

A weak battery causes the alternator to increase power generation to balance voltage, leading to higher engine load and slightly increased fuel consumption, though the impact is not significant. Below is some information about automotive batteries: Daily Inspection: Car owners should regularly inspect the vehicle's battery through the observation window on the battery. If the window displays black, it indicates the need for charging; green means the battery is in good condition, while white suggests insufficient electrolyte. Precautions: Avoid parking the car in open parking lots for extended periods. If long-term parking is necessary, remove and take the battery to prevent freezing damage.

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How many items are there in the A2 driving test?

What are the normal high and low pressures for a car air conditioner?

What Causes the Failure of Car Power Window Switches?

What is the appropriate heat insulation rate for car window films?

Can car wash shops inflate tires?

Does Water Entering the Car Cabin Floor Have a Significant Impact on the Vehicle?

Does a Weak Battery Affect Power and Fuel Consumption?

What are the requirements for towing a travel trailer with a car?

Where Are the Car Sensors Located?

Can I Reduce Points by Studying Traffic Laws with 9 Points Deducted from My Driver's License?

Can Cars Be Modified?