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WorksheetsPMMI REVIEW - Couplings
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Describe the function of a solid coupling
a)
A solid coupling functions to rotate the shafts in opposite directions.
b)
A solid coupling functions to separate two shafts for flexibility.
c)
A solid coupling functions to connect two shafts together rigidly for power transmission.
d)
A solid coupling functions to absorb vibrations in the shafts.
2.
Describe the function of a sleeve coupling
a)
A sleeve coupling is used for heat dissipation between shafts
b)
A sleeve coupling is designed to increase rotational speed of shafts
c)
A sleeve coupling is used to connect two shafts together while allowing for misalignment.
d)
A sleeve coupling is used to store lubricants for the shafts
3.
Describe the effect of thermal expansion on coupling alignment
a)
Thermal expansion has no impact on coupling alignment
b)
Coupling alignment improves with thermal expansion
c)
Thermal expansion can cause misalignment in couplings due to differential expansion rates of the connected components.
d)
Couplings expand uniformly with temperature changes
4.
Describe coupling misalignment in a mechanical drive system
a)
Is when the gears are too small
b)
Is caused by excessive lubrication
c)
Is a result of over-tightening the bolts
d)
Occurs when the input and output shafts of the system are not properly aligned.
5.
What cause shaft misalignment in a mechanical drive system
a)
Improper installation, wear and tear, thermal expansion, or excessive loads
b)
Lack of lubrication, over-tightening, incorrect material choice
c)
Vibration, electrical interference, incorrect gear ratio
d)
Corrosion, improper maintenance, inadequate power supply
6.
Describe the what soft foot is
a)
Soft foot is a type of shoe designed for comfort
b)
Soft foot is a term used in dance to describe a gentle step
c)
Soft foot is a condition where one or more of the feet of a machine are not in the same plane as the others, causing misalignment and potential issues with operation.
d)
Soft foot is a condition where a machine operates silently
7.
what does elastomeric mean when choosing a coupling
a)
Elastomeric indicates that the coupling is intended for use in low-temperature environments, without any impact resistance.
b)
Elastomeric refers to the coupling being designed for high-speed applications only, neglecting any misalignment compensation.
c)
Elastomeric means the coupling is made of a hard, rigid material that does not provide any flexibility or shock absorption.
d)
Elastomeric means the coupling is made of an elastic material that can absorb shock and vibration, providing flexibility and compensating for misalignment.
8.
What is one advantage of a grid coupling
a)
Reduces vibration significantly
b)
Requires frequent maintenance
c)
Increases energy efficiency
d)
Reduces noise levels
9.
Do couplings need lubrication?
a)
Yes
b)
Rarely
c)
Sometimes
d)
No
10.
What is one type of coupling that needs lubrication
a)
Chain coupling
b)
Magnetic coupling
c)
None
d)
Rigid coupling
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