Answer: The most common types of mechanical power transmission systems include:

• Belt Drives: These use flexible belts and pulleys to transmit power over relatively long distances. They are known for their quiet operation and ability to absorb shock.

• Chain Drives: Consisting of a chain and sprockets, these systems are used when a positive, non-slip drive is required. They are highly efficient and can handle higher loads than belt drives.

• Gear Drives: Using interlocking toothed wheels, gear drives are excellent for transmitting power over short distances. They offer precise speed and torque ratios and are highly durable.

• Shaft Couplings: These devices connect two rotating shafts to transmit power while accommodating for minor misalignment between them.