Are All Questions in Subject 4 Multiple Choice?

What is the break-in period mileage for the Infiniti QX50?

The break-in period for the Infiniti QX50 is 3,000 kilometers. Before vehicle assembly, each moving component is processed separately, and geometric deviations exist during the machining of parts. Therefore, after assembly, some moving parts may have direct local contact, making it difficult for lubricating oil to reach the friction surfaces, resulting in early wear. The process of wearing away metal debris and burrs from parts when the car is first used is called the break-in period. Below are precautions to take during the new car break-in period: 1. Avoid high-speed driving: New cars have speed limits during the initial driving phase. Domestic vehicles are generally limited to 40-70 km/h, while imported vehicles typically require that within the first 1,000 kilometers, the speed should not exceed 80% of the maximum speed when the throttle is fully open. Additionally, it is important to monitor the engine tachometer and speedometer to ensure the engine and vehicle operate at medium speeds. Generally, the engine speed during the break-in period should be strictly maintained between 2,000 and 4,000 rpm. 2. Throttle and brake usage during the break-in period: Learn to control the depth of the throttle during the break-in period. Pressing the throttle deeply increases air intake, which in turn increases fuel injection, potentially damaging internal components. Frequent hard braking can also cause excessive wear on the braking system. 3. Avoid emergency braking: Emergency braking not only shocks the braking system during the break-in period but also increases the impact load on the chassis and engine. Therefore, it is recommended not to use emergency braking within the first 300 kilometers of driving.

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What brand of engine is used in the Buick Excelle?

The engine of the Buick Excelle is produced at the Shanghai General Motors Yantai Dongyue Base, featuring German technology and is a domestically manufactured engine. The Buick Excelle uses the L2B engine model, with a maximum horsepower of 113Ps, a maximum power output of 83KW, a maximum power speed of 6000rpm, and a peak torque of 141N.m. For daily maintenance of the Buick Excelle's engine, the following methods can be employed: Use lubricating oil of appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions; for diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly replace the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, performance deteriorates, leading to various engine issues. To avoid malfunctions, change the oil regularly based on usage conditions and maintain an appropriate oil level. As oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter becomes clogged and oil cannot pass through the filter element, it may burst the filter element or open the safety valve, allowing oil to bypass through the bypass valve and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.

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What is the maximum load capacity of the Boyue?

The maximum load capacity of the Boyue is 2045kg. The Boyue is a compact SUV under Geely. Taking the 2021 Boyue as an example, its body dimensions are: length 4519mm, width 1831mm, height 1694mm, wheelbase 2670mm, fuel tank capacity 58l, and curb weight 1575kg. The 2021 Boyue is equipped with a 1.8T turbocharged engine, with a maximum power of 120kW and a maximum torque of 250Nm, matched with a 6-speed manual transmission. It adopts a front suspension type of MacPherson independent suspension and a rear suspension type of multi-link independent suspension.

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What transmission does the BMW 3 Series use?

The BMW 3 Series uses an 8-speed automatic manual transmission. The BMW 3 Series is a mid-size car launched by BMW, equipped with a 2.0T turbocharged engine, paired with an 8-speed automatic manual transmission. The BMW 3 Series is a new generation sedan product from BMW Group, with a body weight of 1465 kg, an inline 4-cylinder gasoline engine, and body dimensions of 4734mm in length, 1811mm in width, and 1455mm in height. The 8-speed automatic manual transmission means the transmission has 8 forward gears, allowing drivers to use manual mode or automatic mode during driving.

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What is the fuel tank capacity of the Geely Vision?

The fuel tank capacity of the Geely Vision is 50 liters. Taking the 2020 Geely Vision Manual Asian Games Edition as an example, its body dimensions are: length 4599mm, width 1747mm, height 1482mm, with a wheelbase of 2615mm, a curb weight of 1210kg, and tire specifications of 205/55R16. The 2020 Geely Vision Manual Asian Games Edition is equipped with a 1.5L naturally aspirated engine, with a maximum power of 80kW at 6000rpm, a maximum torque of 142Nm at 4400rpm, paired with a 5-speed manual transmission.

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What Causes a Car's Air Conditioning to Not Cool?

There are several main reasons why a car's air conditioning may not cool properly: 1. Dirty condenser: The purpose of cleaning the radiator and condenser is mainly for heat dissipation. When cleaning, be sure to first use an air gun to blow away dirt before washing with a water gun. Otherwise, it may have the opposite effect—not only will the air conditioning not cool, but fuel consumption may also increase. 2. Substandard refrigerant and compressor oil: Excessive impurities in the refrigerant and compressor oil can also cause the car's air conditioning filter to clog, leading to poor cooling. This increases resistance and reduces the flow of refrigerant to the expansion valve, resulting in insufficient cooling capacity.

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Are All Questions in Subject 4 Multiple Choice?

What is the break-in period mileage for the Infiniti QX50?

What brand of engine is used in the Buick Excelle?

What is the maximum load capacity of the Boyue?

What transmission does the BMW 3 Series use?

What is the fuel tank capacity of the Geely Vision?

What Causes a Car's Air Conditioning to Not Cool?

What type of gasoline should be used for the Toyota Avalon?

What Causes Ford Focus Idle Vibration?

How long is the battery warranty for the Trumpchi GS4?

What is the Scrap Life of a Family Car?