Final answer:
Motors on rubber rings typically use resilient mounting, designed to absorb vibrations and reduce noise, distinct from direct, base, or flexible mountings.
Step-by-step explanation:
Motors that sit on resilient rubber rings typically use resilient mounting. This type of mounting helps absorb shocks and vibrations, providing a flexible interface between the motor and the surface to which it is attached. It is designed to improve machine operation longevity and reduce noise.
This contrasts with other types of mountings like direct mounting, which rigidly fixes the motor to the mounting surface, base mounting, often used for larger, industrial equipment with a dedicated base, and flexible mounting, which can refer to various types of non-rigid mounts that allow for movement or expansion.