Why doesn't the driving instructor turn on the air conditioner in such hot weather?

If the air conditioner is turned on, students may fail. Driving an air conditioner to practice driving has these disadvantages:

1: insufficient power According to estimates, when the air conditioner is turned on for refrigeration, the forward power of the car will drop by about 30%. This means that it is difficult to start, the speed is slow, and it is easy to stall if you can't climb the slope.

2. Limited observation, especially subject 2, requires frequent contact with the window to see the position of the car body. When you turn on the air conditioner, you must close the window, so you can't observe it effectively.

3. When starting climbing, the sound is blocked. When killing the direction, you need to listen to the sound of the engine to help judge the use of the clutch. Turn on the air conditioner, close the window, and the sound interference of the air conditioner refrigerator.