What is the name of the Hyundai Mistra?

How many subjects are tested for the C1 driving school instructor certificate?

C1 driving school instructor certificate requires three subjects to be tested, which are divided into theoretical test, field driving operation test, and demonstration teaching method test. The following is the specific examination process for the C1 instructor certificate: 1. Apply to the municipal road transport management agency in the area where your household registration or temporary residence is located, and fill in the "Application Form for the Qualification Examination of Motor Vehicle Driving Training Instructors". 2. Provide identity proof and copy, motor vehicle driving license and copy, academic certificate or technical title certificate and copy, safe driving experience certificate issued by the road traffic safety authority, and corresponding vehicle driving experience certificate. 3. After the transportation authority and road transport management agency review and approve the materials, they will arrange the examination. The examination implements a national unified examination system, held twice a year. The examination is organized and implemented by the provincial road transport management agency in accordance with the examination outline, question bank, assessment standards, examination work specifications, and procedures formulated by the Ministry of Transport. 4. The examination results will be announced within 10 days after the examination. Those who pass the examination will receive the corresponding road transport practitioner qualification certificate within 10 days from the date of the announcement of the examination results.

18

2

Share

What are the symptoms of a faulty mass air flow sensor?

The obvious symptoms of a faulty mass air flow sensor are: the engine warning light will illuminate, accompanied by decreased engine power, difficulty starting the engine, unstable operation, increased fuel consumption, rough idling, poor acceleration, intake manifold backfiring, and black smoke from the exhaust pipe. Below is additional information: 1. Working principle of the mass air flow sensor: The mass air flow sensor converts the intake air flow information into electrical signals, which serve as the basic signal for fuel injection calculation. These signals are transmitted to the engine control unit (ECU) for processing to determine all functions related to engine speed and load, such as injection timing and ignition timing. If the mass air flow sensor or its circuit malfunctions, the ECU cannot receive accurate intake air volume signals, leading to improper fuel injection control. This results in either excessively rich or lean air-fuel mixtures, causing abnormal engine operation. 2. Classification of mass air flow sensors: There are various types of mass air flow sensors. Common ones can be categorized by their structural types, including vane-type, core-type, hot-wire, hot-film, and Karman vortex types. Regarding the price of mass air flow sensors, most cost around two hundred yuan, but the exact price depends on the product brand, structure, and vehicle model. Generally, high-end vehicle models use more expensive mass air flow sensors, with prices ranging from several hundred to over a thousand yuan.

2

3

Share

What is the difference between SP-grade and SN-grade engine oil?

SP-grade and SN-grade engine oils differ in their thickness and viscosity at certain temperatures, which is due to variations in phosphorus content. SN-grade engine oil has relatively lower phosphorus content, while SP-grade oil has a higher viscosity value, indicating that SP-grade oil forms a stronger oil film than SN-grade, offering better protective performance. The following provides an introduction to engine oil: 1. Definition of engine oil: Engine oil is the lubricant used in engines, composed of base oil and additives. As a type of machinery, engines have specific requirements for lubricants that align with general machinery, such as appropriate viscosity, certain levels of oxidation resistance, wear resistance, corrosion prevention, and viscosity-temperature properties. 2. Function of engine oil: With a density of approximately 0.91×10³ (kg/m³), engine oil serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption and cushioning for the engine.

1

3

Share

Is a 7-speed dual-clutch transmission considered an automatic transmission?

7-speed dual-clutch is an automatic transmission. The following is relevant information about dual-clutch transmissions: 1. Meaning of dual-clutch transmission: Dual-clutch transmission, abbreviated as DCT, is commonly referred to as a dual-clutch transmission because it operates through two sets of clutches. The dual-clutch transmission is located between the engine and the transmission, serving as a transmission mechanism that can both transmit and cut off power. 2. Advantages: (1) Direct gear shifting, minimal power loss, and low fuel consumption; (2) Achieves seamless gear shifting through the alternating work of two sets of clutches. 3. Disadvantages: The extensive use of electronic components increases the likelihood of malfunctions: As it is controlled by a computer, during the gear shifting process, it needs to send electronic signals to the engine and wait for a response before coordinating with the engine to complete the gear shift.

16

5

Share

What are the symptoms of a dirty fuel injector?

Here are the symptoms of a dirty fuel injector: 1. Unresponsive throttle: Acceleration is not as smooth as before; 2. Increased engine noise: Particularly noticeable at low gears and low RPMs; 3. Rough driving: The car feels less powerful than before, and there is a lag when pressing the accelerator. In neutral gear, the tachometer needle rises slowly; 4. Idle vibration: Especially prone to shaking when starting; 5. Increased fuel consumption; 6. Excessive vehicle emissions. Here is some relevant information: The fuel injector is one of the key components of an electronic fuel injection engine, designed to atomize gasoline for better combustion. However, due to various factors, carbon deposits can form on the fuel injector. For example, gasoline itself contains impurities that can accumulate over time, forming sludge-like deposits. Additionally, unstable components in gasoline can react at certain temperatures, forming sticky substances like gum and resin. Therefore, fuel injectors should be cleaned regularly, typically every 40,000 to 60,000 kilometers.

14

4

Share

Does Engine Knocking Require Overhaul?

If the engine knocking is caused by wear of the cylinder, piston, or rings, an overhaul is necessary. If the knocking is due to poor engine atomization or excessively high fuel injection pressure, replacing or cleaning the fuel injectors may suffice. The engine block serves as the framework of the engine, providing the installation base for various mechanisms and systems. It houses all major engine components and bears various loads. More details are as follows: 1. Cylinder Block Introduction: The engine block mainly consists of the cylinder block, cylinder liner, cylinder head, and cylinder gasket. The cylinder block must have sufficient strength and stiffness and can be classified into general-type, crossflow-type, and tunnel-type cylinder blocks. To ensure proper operation under high temperatures, appropriate cooling is required for the cylinder block and cylinder head. 2. Crankshaft Case Introduction: The lower part of the cylinder block that connects to the crankshaft is called the crankshaft case, which can be divided into the upper and lower crankshaft cases. The cylinder head is mounted on top of the cylinder block and must withstand significant thermal and mechanical loads.

14

5

Share

What is the name of the Hyundai Mistra?

How many subjects are tested for the C1 driving school instructor certificate?

What are the symptoms of a faulty mass air flow sensor?

What is the difference between SP-grade and SN-grade engine oil?

Is a 7-speed dual-clutch transmission considered an automatic transmission?

What are the symptoms of a dirty fuel injector?

Does Engine Knocking Require Overhaul?

How to Check the Number of Tire Plies?

Is It Necessary to Add Break-in Additive During the First Maintenance?

What does ECO mean on a Cadillac car?

What is the scorpion tire?