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Question
3. Pick out the wrong statement about gauges for internal threads.
Options:
A .  The Go screw plug gauge is made to the minimum metal limit and of full form and checks the virtual effective diameter. Any error in the pitch or flank angle of screw affects the effective diameter
B .  The dimensions of Go and Not Go gauges correspond to maximum and minimum minor diameters.
C .  Not Go screw plug gauge is made to the maximum effective diameter of the screw thread cleared at the root and crest.
D .  The plain Go and Not Go gauges are used for checking the limits of the size of minor diameter.
Answer: Option B

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