1.What are the three basic principles that allow an electric motor to operate? 2. What is the difference between rotary and stationary equipment? 3. How is power transmission in rotary equipment...

1.What are the three basic principles that allow an electric motor to operate? 2. What is the difference between rotary and stationary equipment? 3. How is power transmission in rotary equipment classified? 4. Explain the importance of lubrication for a pump, compressor, or turbine. 5. What is the difference between a rigid and a flexible coupling?