What is the reason for dripping water from the exhaust pipe of the car? Is this normal?

The reasons for dripping water from automobile exhaust pipe are as follows: after gasoline is completely burned, water and carbon dioxide are formed. Water will produce steam at high temperature. Water vapor is colorless and transparent at high temperature, but when the temperature is lower than 100 degrees, it will become water. When the ambient temperature is low, the white smoke from the exhaust pipe is water vapor. When water vapor condenses, it will accumulate water droplets and eventually become water. Maintenance method of automobile exhaust pipe: prevent muffler from rusting: when washing a car or driving in rainy days, water should be avoided inside the muffler. If water enters accidentally, start the engine to idle for 10 minute, and try to drain the accumulated water inside. Prevent the muffler from discoloring: When there is oil stain on the muffler surface, it will turn yellow and blue after heating. When there is a lot of dirt on the muffler surface, it is not necessary to clean it in time to avoid affecting its heat dissipation.