When a bourdon tube pressure gage is tested...

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Question 1 of 205eccefa5bacbc34ba4d48758

When a bourdon tube pressure gage is tested and found to be inaccurate, adjustment must be made to obtain the correct readings. The distance between the pointer spindle and the link connection to the sector gear will be changed when the __________.

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🔍 Key Concepts

• Bourdon tube pressure gauge mechanics – how motion of the tube is transferred through the linkage, sector gear, and pointer • Difference between span (range) error and linearity error in a gauge • What changing the distance between pointer spindle and link connection actually affects (overall span vs only certain points)

💭 Think About

• Think about which choice describes a situation where the movement is proportionally correct everywhere, but the entire scale is shifted up or down. • Ask yourself: changing the distance between the pointer spindle and the link changes the mechanical leverage. Does that fix a problem at just one point on the scale, or across the whole range? • For each option, decide whether the problem exists at all pressures or only at certain parts of the scale. Which condition would you correct by changing the span (mechanical gain)?

✅ Before You Answer

• Identify which option describes correct proportional movement for each added test weight, even though the readings are off. • Check which symptoms would suggest a problem with zero or calibration at one point only, versus a problem with the entire span of the scale. • Before choosing, decide clearly: does adjusting the distance between spindle and link mainly correct overall span or single-point error? Match that to the option.

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