Correct Answer - Option 1 : Vertical pivot axis
Concept: -
Following is the difference between permanent and temporary Adjustments.
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Permanent Adjustments
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Temporary Adjustments
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The permanent adjustments done in a compass are as follows –
a) Adjustment of sight vanes
b) Adjustment of pivot point
c) Adjustment of needle
d) Adjustment of levels
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The temporary adjustment done in a compass are as follows –
a) Centering
b) Leveling
c) Focusing
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Note: - Temporary adjustment needed every time just before taking observations while permanent adjustments are done only when internal parts are disturbed.
