What is the value of hardness for plug and ring gauges used for self-h – McqOptions

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1.	What is the value of hardness for plug and ring gauges used for self-holding tapers?
A.	750 to 860 HV
B.	120 to 540 HV
C.	550 to 740 HV
D.	900 to 1200 HV
Answer» B. 120 to 540 HV

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