The compressor in figure 4, if permitted to...

🔍 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?

The compressor in figure 4, if permitted to operate as illustrated will __________. See illustration GS-0159.

lose its volumetric efficiency

damage the bearings of the motor

trip the breaker when being restarted for the first time after replacing the belts

result in a constant enlargement of the clearance expansion volume

🔍 Key Concepts

💭 Think About

✅ Before You Answer