What is required for the successful completion of the buffer test in terms of oil?

For the successful completion of the buffer test, having the correct oil level is crucial. The buffer system relies on oil to create the necessary hydraulic pressure to effectively absorb and dissipate the energy of the elevator's movement. If the oil level is not at the specified height, it can lead to inadequate performance of the buffers, making them less effective in preventing excessive shock to the elevator system. Ensuring the correct oil level allows for the proper functioning of the buffers, which is essential for the safety and stability of the elevator operation. Thus, maintaining the correct oil level is a fundamental requirement for conducting the buffer test effectively.