Metrology & Quality Control Test Questions

Q.  Which of the following statements is true?

a. In three wire method, each flank of a thread is touched by a wire in axial plane section and this is valid only for a thread having rank angle
b. Compression error is always subtracted from effective diameter value obtained
c. Floating carriage type of micrometer is used for two wire method ----
d. The value of θ is assumed 30o while calculating best wire diameter for Withworth thread


ANSWER: See Answer
 
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