Machinery with ball bearings designed to be...

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Question 1 of 205eccef9cbacbc34ba4d45b08

Machinery with ball bearings designed to be filled with grease should have the relief plug temporarily removed while grease is being added. This plug should remain out until the machinery has been operated and sufficiently warmed up to ensure that __________.

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🔍 Key Concepts

• Function of a relief plug on a grease-packed bearing housing • What happens inside a grease-lubricated ball bearing as it warms up and starts rotating • Difference between venting air, flushing contaminants, and expelling excess grease

💭 Think About

• Think about what you are trying to PREVENT if you left the plug in while you pump in cold grease and then start the machinery • As the bearing heats up and begins to turn, what happens to the volume and flow of the grease inside the housing? • Which option best matches the main safety/maintenance purpose of leaving a relief opening temporarily unsealed?

✅ Before You Answer

• Identify the primary risk of overpacking a grease bearing and then sealing it before operation • Decide whether the plug’s role is more about pressure/volume changes or about contamination removal • Ask which choice describes a process that would naturally occur as the machine runs and warms up with the plug still out

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