When the concrete mixer truck is loaded with concrete from the mixing plant to the construction site in the urban area, there are many vehicles and pedestrians in the urban area, and the road conditions are also complex. Slow down and brake at any time to ensure driving safety. Braking technology is one of the realms of good driving concrete mixer.

在混凝土搅拌车行驶过程中，或者是在停车场。经常会在排气管发现有滴水现象。甚会有一地水迹。

When the concrete mixer is driving, or in the parking lot. Dripping water is often found in the exhaust pipe. There will even be a trace of water.

维修人员表示，混凝土搅拌车排气管滴水是好现象。证明燃料在发动机得到了充分的燃烧，混凝土搅拌车的排气管从而会向外滴水，其实这是一个很正常的现象。

Professional maintenance personnel said that dripping water from the exhaust pipe of concrete mixer truck is a good phenomenon. It is proved that the fuel is fully burned in the engine and the exhaust pipe of the concrete mixer will drip outward. In fact, this is a very normal phenomenon.

排气管之所以滴水就是因为环境温度比较低，汽油完全燃烧后生成的是水和二氧化碳，水在高温下是水蒸气，水蒸气在排气管和消音器中冷凝的结果，只不过当环境气温较高时，水蒸气还没有冷凝就已经排出去了，当环境温度较低时，水蒸气就会在排气管壁冷凝成水滴，并且沿排气管流出来了。特别是在冬季，冬季外界环境比较冷，空气湿度大，汽车在运行后，发动机内外温差大，更容易出现汽车排气管向外滴水的现象。

The reason why the exhaust pipe drips water is that the ambient temperature is relatively low. After the gasoline is completely burned, water and carbon dioxide are generated. The water is water vapor at high temperature. The water vapor condenses in the exhaust pipe and silencer. However, when the ambient temperature is high, the water vapor has been discharged before freezing. When the ambient temperature is low, Water vapor condenses into water droplets on the exhaust pipe wall and flows out along the exhaust pipe. Especially in winter, the external environment is relatively cold in winter and the air humidity is high. After the car is running, the temperature difference inside and outside the engine is large, which is more prone to the phenomenon of dripping water from the car exhaust pipe.