The diagram above represents a portion of a micrometer screw 20 gauge. What is its reading?

a
3.70mm
b
3.67mm
c
3.50mm
d
3.33mm
e
3.17mm
Explanation
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seaneverdries
10 years ago
Correct!!!
main scale reading is "3mm" starting from zero
and d vernier scale reading is 17 convert to mm = 0.17mm
therefore 3 0.17 = 3.17




