🔍 Key Concepts

• Effect of angular misalignment between motor and compressor on shaft and bearings • How belt tension and side loading are transmitted to motor and compressor bearings • Difference between capacity/volumetric efficiency problems inside the cylinders and mechanical alignment problems outside the cylinders

💭 Think About

• Look closely at figure 4: how is the compressor mounted relative to the base and motor? Is the shaft straight or at an angle? What does that do to the load on the rotating parts? • Which of the choices deals with internal volume and compression process, and which deal with external rotating parts like belts, couplings, and bearings? • If the unit runs for a while in that crooked position, which component is most likely to feel the continuous side force from the belt or coupling?

✅ Before You Answer

• Identify whether figure 4 shows a problem with alignment/mounting or with the compression chamber volume. • Decide which answer choice refers to internal cylinder performance (volumetric efficiency/clearance volume) and which refers to mechanical damage (bearings, starting current). • Ask yourself: with the machine physically tilted like that, what part actually carries the extra radial load all the time while the belt or coupling turns?