A set point adjustment to a bourdon tube...

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Question 1 of 205eccefa5bacbc34ba4d48759

A set point adjustment to a bourdon tube pressure gage is accomplished by __________. adjusting the effective moment arm length between the end of the bourdon tube and the quadrant gear fulcrum adjusting the pointer position relative to the pinion shaft upon which it is mounted

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🔍 Key Concepts

• Bourdon tube pressure gauge mechanism – how motion of the tube is transmitted through the link, sector/quadrant gear, and pinion to the pointer • Difference between calibrating/zeroing the gauge and simply rotating or repositioning the pointer on the shaft • How changing linkage geometry (moment arm length) affects the relationship between actual pressure and pointer indication

💭 Think About

• Think about which action actually changes the mechanical relationship between applied pressure and indicated pressure over the full scale, not just at one point on the dial • Ask yourself: if you only loosen the pointer and rotate it on the pinion shaft, what happens to the accuracy at other points on the scale? • Consider whether a set point (calibration) adjustment should affect the whole range proportionally, or just shift the reading at a single position

✅ Before You Answer

• Clarify whether "set point adjustment" here means calibration of the pressure indication versus true pressure, or merely re‑indexing the pointer • Visualize the internal parts: bourdon tube tip → link → quadrant/sector gear → pinion → pointer, and which parts change the mechanical ratio and which only change the indication reference • Verify for each statement (I and II) whether it would affect the entire scale calibration or just the zero/reference position of the pointer

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