CQI Practice Test 13

Shaft diameters are toleranced 0.7480–0.7500 in. An inspector's records show many readings at exactly 0.7480 and 0.7500 but none outside the limits. A recheck of the same shafts by a second inspector with the same micrometer finds several at 0.7478 and 0.7502. Which inspection error is most likely?