When the pressure applied to a Bourdon...

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Question 1 of 205eccefa5bacbc34ba4d4874a

When the pressure applied to a Bourdon tube-type pressure gage is reduced to atmospheric pressure, the tube will begin to 'bend' towards the center of arc. Small variations develop preventing the tube from returning to its exact original shape due to the process known as __________.

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🔍 Key Concepts

• Behavior of a Bourdon tube when pressure is increased and then decreased • Definition of hysteresis in mechanical/elastic systems • Difference between temporary elastic deformation and permanent set in metals

💭 Think About

• Think about what happens when a metal element is repeatedly flexed and does not return to exactly the same position each time. What is that phenomenon called? • Which option refers to a known effect in gauges and instruments where the reading on the way up differs slightly from the reading on the way down? • Ask yourself which choice is a standard engineering term used when a materials response depends on its loading history, not just its current load.

✅ Before You Answer

• Verify which term is commonly associated with instrument and gauge error related to loading and unloading cycles. • Eliminate any options that are not standard engineering/mechanics vocabulary youd expect in a USCG engineering question. • Confirm that the correct term specifically describes lag or difference in behavior between increasing and decreasing pressure in a Bourdon tube.

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