Auto repair professional homework, all the big guys to help

I think auto mechanics are very promising and lucrative!

There is no high or cheap work, as long as you feel that it is suitable, now learning auto repair is indeed a good choice for many children who have not received higher education, and I will briefly analyze why auto repair is worth learning:

First, the current demand for special types of work is strong and in short supply; The high salary of skilled workers has always been recognized by everyone, it is true that because of the current college students everywhere, there are really too few skilled technical operators, skilled workers are not only high wages but also very sought-after, if you study auto repair, a period of time to learn something, master a certain technology, then it is not a problem to find a high-paying job;

Second, with the popularization of the concept of family cars, the number of cars in China's urban and rural areas has been increasing, taking my hometown as an example, young men and women almost all have to buy cars when they get married, which has become a popular trend, which means that a large number of cars need to be maintained and repaired, so from this level you are also very promising in the auto repair industry;

Third, in fact, the state also has subsidies and support measures for skilled workers, if you choose to enter a vocational and technical school to study auto repair, there may be state subsidies, many vocational colleges are also free of tuition and subsidies; Even if you go to the repair shop to work as an apprentice, there will be a basic salary and subsidy, so you can study with confidence; My cousin is an auto repair who did not finish high school and dropped out of school, and now he can repair from family cars to trucks and buses, and opened a small auto repair company in our local county, from car maintenance to repair, he is very professional, and the customers are also very stable, and the income is higher than which university we are

However, this means that there is a long and arduous road to go, and may be often scolded by the master at the beginning of learning, and the working environment is not high, you need to adapt to it

In general, I am very optimistic about auto repair, after all, where there is a car, there must be maintenance, so it is convenient! But the car maintenance workers who are really good and willing to work hard will really have a future, otherwise it is difficult to master the technology and find a satisfactory job if they give up halfway, or learn every day! The auto repair market will not be saturated for a long time, and it still needs a lot of technical talents to enter, so I think it is a good choice to study and engage in the auto repair industry!

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You can learn the chassis first, and then the circuit.

Now it's useless to read a book, someone has to explain it on the spot.

Auto repair is a very broad concept, or it is recommended that you start with the engine, our school is like this.

1.What is the salary of the apprentice after employment, what is the official salary, and how long does it take to do 2w a month?

A: The salary of an auto mechanic apprentice will not exceed 1,000 yuan, and the time will not be less than 3 years.

If it is an intermediate worker who graduated from a vocational college or technical school, the first three months after employment, called the probation period, the salary will be between 1500 yuan and 2000 yuan, after the regularization, will not be later, the technical clearance, will not be less than 300 yuan, the current auto mechanic, the salary of the technical backbone will be about 5000 yuan.

Note: The salary of auto mechanics, according to the current wage standard, will not be 2w a month, because you are just waiting for the bus, not engaging in scientific and technological innovation. Unless you're a small owner of a small auto repair shop, that's a different story!

2.Several auto repair technician schools are recommended.

This can be checked on the Internet: I know, Weihai Institute of Technology's auto repair major, there are several professors in this area, very dedicated, theirs is also a national key major (national key construction of service capacity to enhance the construction of the major), their auto repair course in the "automobile chassis system maintenance technology", "automotive air conditioning system", "diesel engine maintenance technology", etc., are national key construction quality courses, which to a certain extent reflects their power.

The most important thing is that their spirit of taking the happiness of students' lives as their goal is touching and reassuring!

3.The specific classification of auto repair, which is more profitable.

Classification of auto mechanics: In general, there are two categories: one is mechanical:

Chassis, engine, shape, etc., one is the electrical aspect: air conditioning, instrumentation, etc. In contrast, mechanical repairs may be more irreplaceable, so mechanical repairers may be more profitable, but the gap is not too big.

Because, the vehicle is a whole, and no matter what breaks, there will be problems, so you can't say who is more important. It's all about repairing it.

FYI!

1. What are the components of the lubrication system? What are the functions of safety valves, bypass valves and check valves?

Answer: Composition: oil pump, oil filter, oil cooler, filter collector, oil pressure gauge, oil channel, pressure limiting valve, bypass valve, check valve.

Safety valve: at alternating speed (excessive flow rate), cold start (high viscosity). The oil circuit pressure is high, and the safety valve is opened.

Bypass valve: the oil circuit is blocked, the oil pressure is too high, the limit value is exceeded, the bypass valve is opened, and the oil directly enters the main oil circuit.

Check Valve: When the engine is shut down, the check valve closes to prevent the oil filter from flowing back into the oil pan.

2. What are the functions of engine oil? What is the difference between SAE5W-40 and SAE10W-30?

Answer: The function of engine oil: lubrication, friction reduction, cooling, cleaning, sealing, rust prevention.

Differences: The temperature limits are different when used at high and low temperatures.

3. What are the pros and cons of a rotor oil pump with more teeth?

Answer: The advantages of rotor type oil pump are compact structure, large oil supply, uniform oil supply, low noise, and high vacuum degree of oil absorption. Therefore, when the oil pump is installed outside the crankcase or in a high position, it is more appropriate to use a rotary oil pump.

The disadvantage is that the sliding resistance of the meshing surface of the inner and outer rotors is greater than that of the gear pump, so the power consumption is larger.

4. When using dual oil filters, are they connected in parallel or in series in the lubricating oil circuit? Why?

Answer: The primary filter is connected in series, and the secondary filter is connected in parallel.

Most of the oil enters the main oil channel through the coarse filter, participates in lubrication, ensures the oil supply, and a small amount of oil is carefully filtered by the fine filter, and then returns to the oil pan, mixed with the oil through the coarse filter, and improves the oil quality. After a period of time, the entire oil can be completely filtered through a fine filter.

1. When starting, only the "gurgling" sound of the electromagnetic switch of the starter is heard, or the starter drives the crankshaft to rotate slowly a few times when starting for the first time, and then the "gurgling" sound of the starting electromagnetic switch appears, but the crankshaft does not rotate. This phenomenon is generally a "broken" fault of the battery.

2. The temporary parking can be started every time, but the crankshaft can only be rotated when the parking time is long or the next day is started. This phenomenon belongs to the serious self-discharge of the battery, and its plates and separators are seriously aged, indicating that the battery is close to being scrapped.

3. When starting, the starter suddenly rotates weakly, and is accompanied by the smell of burning rubber or smoke coming out of the battery, which is mostly due to poor contact between the pole pile and the pole pile clamp and the heating and burning.

4. If the starter driving gear and the engine flywheel gear ring make an idling sound of collision when starting, there are two reasons: one is the deformation of the meshing cutting surface of the flywheel gear ring; Second, the gap between the starter drive gear and the flywheel gear ring is too large. The two can't be meshed, and the engine won't start.

5. As soon as the main power switch is turned on, the starter drive gear will be meshed with the flywheel gear ring and rotate together. This kind of failure occurs, firstly, the holding coil of the electromagnetic switch of the starter is misconnected on the power supply binding post; The second is that the 3 wires on the key switch are connected wrongly, and the judgment method is: the starter drive gear does not rotate when the key is in the "0" position, and the motor drive gear is started to rotate together with the flywheel gear ring in the "2" position.

6. When the start switch is turned to the starting position, the engine cannot be started, and there is no other phenomenon. This kind of failure, first, the key and switch are not connected to the starting circuit due to wear; Second, the starter relay is not connected to the starter electromagnetic switch circuit; Third, the power switch is not connected to the main circuit.

7. There is only a slight "click" sound when starting, and there is no response, which is caused by the issuance of the starting relay. At this time, as long as you press the tail of the solenoid to force the solenoid forward, the starting circuit can be turned on, so that the engine can be started.

Big brother, these 200 words are a bit much, I can give you a solution to the problem that can't be started.

A non-track, unwired vehicle that is powered by its own power plant and has 4 or more wheels. A car generally consists of four basic parts: engine, chassis, body, and electrical equipment.

An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy. An engine applies to both a power generation unit and an entire machine including a power unit (e.g

gasoline engines, aero engines). The engine was first born in England, so the concept of the engine also originated from the English language, and its original meaning refers to the "mechanical device that produces power".

Go to Guangzhou Dongfeng Motor Institute to see, or blog, there are more.