Are there questions outside the test bank for Subject 1?

What are the causes of idling vibration when in D gear?

Excessive carbon buildup can cause idling vibration when in D gear. Reasons for engine idling vibration: Severe carbon deposits in the engine cylinders can lead to spark plug blockage and valve blockage, which directly causes the car to vibrate during idling. Fuel supply system issues with unstable oil pressure can easily result in unstable mixture concentration, leading to vibration and unstable idling. Solutions for idling vibration: If the engine carbon has been cleaned, the throttle body washed, and the oil pads and spark plugs replaced, but the car still vibrates during idling, unstable oil pressure might be the cause, and a professional should be consulted for inspection. Check the condition of the spark plugs, high-voltage wires, and ignition coils.

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Should a small pit in the windshield be repaired?

It needs to be repaired. Generally, damage to the front windshield is caused by small stones hitting it while driving at high speed. Reasons: Potential safety hazards: When the car is driving at high speed, the wind pressure on the glass is relatively high. If the windshield is of poor quality, it may cause the glass to crack or even shatter, posing significant safety risks while driving. Affects driving visibility: Even though it's just a small pit, it can cause the driver to misjudge objects, leading to potential safety hazards. Affects aesthetics: A small pit on an otherwise intact windshield doesn't look perfect.

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What Causes Water Sounds in the Exhaust Pipe?

Car exhaust pipe has water sounds for the following reasons: Gasoline Combustion: Gasoline is mainly composed of octane, a chemical compound of carbon and oxygen. Combustion produces carbon dioxide and water, which is the primary source of moisture. The water produced by gasoline combustion is in a gaseous state. When it comes into contact with the cold exhaust pipe, some of the water vapor condenses into a liquid form and remains in the exhaust pipe. Solution: Drive at high speeds or start the car with the handbrake engaged during midday when temperatures are higher. Quickly press the accelerator in neutral to raise the engine speed to between 2000 and 4000 RPM, then release. Repeat this several times. After getting out of the car, check the exhaust pipe, and you will notice a large amount of water being expelled. Repeat the process until no more water comes out.

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What Happens If You Make a U-Turn at a Highway Exit?

Motor vehicles crossing the central isolation facilities on highways to make a U-turn in violation of regulations will be fined and have 12 points deducted from their license according to the law. Requirements for U-Turns: Traffic authorities remind that according to laws and regulations, motor vehicles can make U-turns at locations where there are no prohibitions against U-turns or left turns marked by signs or road markings, but they must not obstruct the normal passage of other vehicles and pedestrians. Additionally, when turning or making a U-turn, motor vehicles must activate their turn signals at least 30 meters in advance, and the maximum driving speed must not exceed 30 kilometers per hour. Legal Basis: Article 25 of the "People's Republic of China Highway Traffic Management Regulations" stipulates that motor vehicle drivers who violate these regulations by overtaking or changing lanes improperly will be fined and have their driver's license suspended for twelve months.

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Location of the Transmission Overflow Port?

Automobile overflow port is located above the rear wheel, next to the transmission. Additional Information: Function of the overflow port: The overflow port is the refueling position for automobiles, providing fuel supply functionality. It also allows checking whether the vehicle's fuel level is normal. Refueling timing: Generally, refueling should be done when the fuel gauge shows one-quarter remaining or when the pointer reaches the red line. Avoid waiting until the fuel is completely depleted to refuel, as this may cause damage to the engine. Refueling precautions: Avoid waiting until the fuel is completely exhausted before refueling, as this may reduce the lubrication effect of the engine and affect its service life. Always choose reputable gas stations for refueling to ensure fuel quality.

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How Long Should You Wait for the Engine to Cool Before Washing a Motorcycle?

You can wash the motorcycle once the engine has cooled down. Precautions for washing a motorcycle: Avoid going to a car wash or having someone else wash it unless absolutely necessary. While car washes may seem well-equipped and operate professionally, their focus on efficiency can sometimes lead to poor results. Improper washing may damage the spark plug and various wiring systems. Always ensure the hot engine has cooled down before washing. Sudden cold water rinsing of the engine, exhaust pipe, and other components can cause thermal contraction, damaging oil seals and leading to engine oil leaks. Many cases of minor engine oil leaks in motorcycles are caused by this. Additionally, it can cause the chrome plating at the connection between the exhaust pipe and the engine to peel off, oxidize, and rust. Avoid direct water rinsing of the headlight, left and right handlebars, ignition switch, exhaust pipe outlet (preferably blocked with something), horn, spark plug, air filter, and battery, as these areas contain electrical circuits. Getting them wet may cause short circuits or leakage, resulting in issues like non-functioning lights, unresponsive horn, failure to start, or weak performance. It's best to clean these areas with a cloth. Motorcycle washing sequence: Ride the motorcycle to an indoor washing area, paying attention to the most critical point: never rinse the body directly when the engine is still hot. Wait until the engine temperature drops before starting. Keep the rinsing time short—just enough to remove surface dust. For extremely dirty areas like body panels, targeted high-pressure rinsing is acceptable. After rinsing the body, evenly spray car wash detergent (foam) all over the motorcycle, still being cautious around the engine. Then, use a soft sponge to wipe and remove deeper stains.

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Are there questions outside the test bank for Subject 1?

What are the causes of idling vibration when in D gear?

Should a small pit in the windshield be repaired?

What Causes Water Sounds in the Exhaust Pipe?

What Happens If You Make a U-Turn at a Highway Exit?

Location of the Transmission Overflow Port?

How Long Should You Wait for the Engine to Cool Before Washing a Motorcycle?

What Plug-in Hybrid Models Does Volkswagen Offer?

Can I park in the hatch-marked area?

What is the fuel consumption per 100 kilometers for the e300l?

What Can Be Extracted from a Three-Way Catalytic Converter?