If zeroth division of head scale is below the index line of pitch scale, the correction is said to be

-ve

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+ve

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both (a) and (b)

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uncertain

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Solution

The correct option is C -ve
The correction is - ve because if zeroth division of head scale is below the index line of pitch scale the reading coming would be a bit entra, so to remove that extra reading we need to subtract the deviation.

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If zeroth division of head scale is below the index line of pitch scale, the correction is said to be

The correct option is C -veThe correction is - ve because if zeroth division of head scale is below the index line of pitch scale the reading coming would be a bit entra, so to remove that extra reading we need to subtract the deviation.

The correct option is C -ve
The correction is - ve because if zeroth division of head scale is below the index line of pitch scale the reading coming would be a bit entra, so to remove that extra reading we need to subtract the deviation.