What is the incorrect statement about coasting downhill with the engine off?

Can the exhaust valve of the dryer tank be repaired if it leaks?

The exhaust valve of the dryer tank can be repaired if it leaks. The one-way valve should be cleaned, and the pipelines behind the dryer tank should be inspected to locate the leakage point and ensure it is sealed, thereby resolving the frequent leakage issue of the dryer tank. Below are some precautions for the dryer tank: 1. After a period of use, the dryer tank will lose its drying function, so it is recommended to replace the dryer tank annually. 2. The unloading pressure of the dryer tank is adjusted at the factory, and users should not arbitrarily adjust the pressure-regulating screw, as this may render the dryer tank unusable. 3. If the dryer tank frequently exhausts, it may be due to debris at the sealing part of the one-way valve or a leak in the pipelines behind the dryer tank's one-way valve. The one-way valve should be cleaned, and the pipelines behind the dryer tank should be inspected to locate the leakage point and ensure it is sealed, thereby resolving the frequent leakage issue. 4. The starting temperature for the dryer tank's heating is 7℃±6℃. If freezing is observed in the dryer during cold weather, it indicates that the dryer tank's heating device is damaged. The heating device assembly should be replaced to prevent freezing damage to the pipelines.

20

2

Share

Is 0w20 Oil Mandatory for Mazda?

Mazda does not necessarily require the use of 0w20 oil; other oil grades can also be used. 0W-20 is typically only blended with synthetic or Group III base oils and can be used in both winter and summer. Here are several methods for selecting engine oil: Hand-Rubbing Method: Rub the lubricating oil repeatedly between your thumb and index finger. High-quality lubricating oil should feel smooth, produce minimal residue, and show no signs of friction. If you feel significant friction, such as sand-like particles between your fingers, it indicates the oil contains many impurities and should be replaced. Light Inspection Method: On a clear day, use a screwdriver to lift the oil at a 45-degree angle to the horizontal plane. Observe the oil droplets under sunlight. If no wear particles are visible, the oil is in good condition and can continue to be used. If excessive wear particles are present, the oil should be replaced. Oil Stain Method: Take a clean white filter paper and drop a few drops of oil onto it. After the oil has seeped through, if black powder appears on the surface and feels rough to the touch, it indicates the oil contains many impurities. Good oil will leave no powder, feel dry and smooth to the touch, and leave a yellow stain.

6

2

Share

What are the test items for B2 Subject 2?

Large vehicle A1, A2, A3, B1, and B2 test items include: pile test, slope fixed-point parking and starting, parallel parking, passing single-plank bridge, curve driving, right-angle turn, passing width-limited gate, passing continuous obstacles, bumpy road driving, narrow road U-turn, as well as simulated highway driving, continuous sharp turns on mountain roads, tunnels, rainy (foggy) weather, slippery roads, and emergency handling. Small vehicle C1 and C2 test items include: reversing into a garage, parallel parking, slope fixed-point parking and starting (canceled for C2), right-angle turn, and curve driving (commonly known as S-turn) as five mandatory items (some regions also have a sixth item: high-speed toll card collection). The full score for Subject 2 is 100 points, with evaluation criteria set for failing, deducting 20 points, deducting 10 points, and deducting 5 points. The test is considered passed if the following conditions are met: ① For large passenger vehicles, tractors, city buses, medium-sized passenger vehicles, and large trucks, a score of 90 or above is required; ② For other vehicle types, a score of 80 or above is required. Subject 2 can be taken once, and if failed, a retake is allowed. If the retake is not taken or still fails, the test is terminated, and the applicant must reschedule the test after ten days. Within the validity period of the driving skill test permit, the number of scheduled tests for Subject 2 and Subject 3 road driving skills tests must not exceed five. If the fifth scheduled test still fails, the results of other passed subjects will be invalidated.

15

0

Share

If one brake line is broken, do the other brakes still work?

Braking will still be possible, but the stopping distance will significantly increase. Below is relevant information about brake line fractures in vehicles: 1. Diesel engine high-pressure fuel line breakage: Check if the fuel injector is stuck in the closed position. If the injector is stuck while the engine is running and the plunger continues to inject fuel, the high-pressure fuel line has very limited pressure tolerance. Prolonged exposure to this pressure will cause the high-pressure fuel line to rupture. This issue can be identified by disassembling and inspecting the fuel injector - replacing the injector will solve the problem. 2. Poor fuel valve unloading: High-pressure fuel line fractures are also related to poor fuel valve unloading. If the fuel valve seal is ineffective or unloading is poor, resulting in excessive residual pressure or cavitation in the high-pressure fuel line, it will cause fatigue damage or cracks in the line. Prolonged engine operation beyond the fatigue strength of the high-pressure fuel line material will lead to line fractures.

17

0

Share

Why don't 48cc motorcycles need to be licensed?

48cc motorcycles do not need to be licensed because legally, vehicles with 48cc displacement are not required to have license plates, as 48cc vehicles pose minimal harm. However, a vehicle registration certificate is still necessary. Fuel-powered assist bicycles, officially known as "gasoline-engine assisted bicycles," do not require a vehicle registration certificate. Vehicles that do not need license plates or a driver's license mainly fall into three categories: 1. Two-stroke scooters that resemble electric motorcycles in appearance. These vehicles operate on a simple principle, are compact, but are noisy, consume more fuel, and emit blue smoke due to incomplete combustion during operation. 2. Single-cylinder four-stroke fuel-powered assist bicycles. These vehicles use four-stroke engines, which enhance the complete combustion of gasoline, significantly reducing pollution and noise. 3. Track racing vehicles not intended for road use. These are limited to operation in designated areas only. Standards for licensing motorcycles: Currently, the maximum displacement allowed for motorcycles in China is 250cc. Theoretically, any legally produced domestic motorcycle can be licensed. Regulations stipulate that any motor vehicle weighing over 40KG or with a maximum speed exceeding 20KM/h is classified as a motor vehicle and must be licensed before road use. For imported vehicles, in addition to the necessary documentation, relevant import customs certificates must be provided. Private modifications to motorcycles are not permitted to avoid safety hazards.

9

0

Share

Does Car Color Wrap Film Damage the Vehicle?

Car color wrap film does not damage the vehicle. Below are the benefits of car color wrap film: 1. Compared to a full-body paint job, color wrap film is easier to apply and better maintains the vehicle's integrity. 3. If you want to restore the original paint, simply remove the wrap film at the installation shop. 4. The colors are vibrant and long-lasting without fading. 5. It has a memory function, allowing minor scratches to self-repair. Below are the effects of car color wrap film on the original paint: 1. It adds a protective layer to the body, shielding the paint from sun, rain, and scratches from sand and stones. The wrap film fully covers the car's paint surface, isolating it from external elements and protecting it from corrosion caused by acid rain, UV rays, bird droppings, and tree sap, as well as preventing scratches and wear from road debris. 2. It preserves the original paint's color and gloss, slowing down aging and keeping the car looking new for years, thereby maintaining its value. Under the protection of the color wrap film, the original paint remains intact and unaffected by environmental damage, ensuring it stays bright and new even after years.

6

0

Share

What is the incorrect statement about coasting downhill with the engine off?

Can the exhaust valve of the dryer tank be repaired if it leaks?

Is 0w20 Oil Mandatory for Mazda?

What are the test items for B2 Subject 2?

If one brake line is broken, do the other brakes still work?

Why don't 48cc motorcycles need to be licensed?

Does Car Color Wrap Film Damage the Vehicle?

What lights should be used when driving in the same direction at night?

What is Nissan's e-POWER Hybrid System?

What to Do When a Motorcycle Battery Dies

Can I Renew My Driver's License with Demerit Points?