Question

What is the common range of wear in ring thread gauge?

(a) 0.0025mm – 0.005mm

(b) 0.025mm – 0.05mm

(c) 0.0025mm – 0.0075mm

(d) 0.025mm – 0.075mm

This question was posed to me at a job interview.

Question is taken from Gauge Wear in portion Metrology of Screw Thread, Gauges for ISO Metric Screw Threads of Engineering Metrology

Answer 1

Right answer is (d) 0.025mm – 0.075mm

Best explanation: It is common for a hardened ring thread gauge to wear from 0.025 mm to 0.075 mm during a few days of operation. Gauge tolerance is adjusted in such a way that takes wear allowance into account.