Couplings

--------- couplings have their hubs directly connected.

• Rigid

• Flexible

• Tire

• Chain

The image shows -------------- coupling.

• flange

• chain

• jaw

• sleeve

The image shows --------- couplings.

• flexible

• rigid

• chain

• gear

Describe the function of a solid coupling

• A solid coupling functions to rotate the shafts in opposite directions.
• A solid coupling functions to separate two shafts for flexibility.
• A solid coupling functions to connect two shafts together rigidly for power transmission.
• A solid coupling functions to absorb vibrations in the shafts.

Describe the effect of thermal expansion on coupling alignment

• Thermal expansion has no impact on coupling alignment
• Coupling alignment improves with thermal expansion
• Thermal expansion can cause misalignment in couplings due to differential expansion rates of the connected components.
• Couplings expand uniformly with temperature changes

Describe coupling misalignment in a mechanical drive system

• Is when the gears are too small

• Is caused by excessive lubrication

• Is a result of over-tightening the bolts

• Occurs when the input and output shafts of the system are not properly aligned.

What cause shaft misalignment in a mechanical drive system

• Improper installation, wear and tear, thermal expansion, or excessive loads
• Lack of lubrication, over-tightening, incorrect material choice
• Vibration, electrical interference, incorrect gear ratio
• Corrosion, improper maintenance, inadequate power supply

Do couplings need lubrication?

• Yes
• Rarely
• Sometimes
• No

A bushed-pin type flange coupling is used

• For intersecting shafts

• When the shafts are not in exact alignment

• For small shafts rotating at slow speeds

• For parallel shafts

What category of coupling provides higher torsional speeds for the system?

• Rigid couplings

• Flexible couplings