Hello, whether you need to give oil when you start halfway up the slope depends mainly on the idle speed of your car. Generally speaking, if the idle speed is greater than 1000, oil should not be given, otherwise it should be given. Generally speaking, the cars given to you by the coach field are designed for easy clearance. Idle speed is adjusted above 1000, and diesel vehicles are still around 1500. But when you get a driver's license and really go on the road, in order to save fuel, the average car's idle speed is below 800, that is, to give oil. It is more difficult to start oil supply halfway up the slope than not to supply oil.
To sum up, whether you need to refuel the car for the exam depends on the car you use for the exam, so it is best to use the same car for the exam and practice. In the final analysis, whether to give oil or not is not the key. The key is that you can pass the exam and not die.