Which of the following is true for precision polygons? – McqOptions

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1.	Which of the following is true for precision polygons?
A.	It is not possible to make a full calibration of the rotary table with one polygon
B.	Correction factor is applicable for reference to the exact centering
C.	Reflecting surfaces should be within 6 to 7 seconds of nominal angle
D.	Correction factor is not applicable when the centre of the mirror is used in calibration
Answer» B. Correction factor is applicable for reference to the exact centering

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