vdoc

Test Questions 7
30. The rule of ten states that:
A. There are 10 different methods to make length or angle measurements.
B. Inspection measurements should be better than the tolerance of a dimension
by a factor of 10, and calibration standards should be better than inspection’s
measurements by a factor of 10.
C. Inspection results cannot exceed 10 times the tolerance on the part being
measured.
D. Inspection measurements should be better than calibration standards by a factor
of 10.
31. According to the rule of ten, if the tolerance on a shaft diameter is ±0.025 mm, then
the increment of measurement on the inspection instrument should be as small as:
A. 0.0025 mm
B. ±0.025 mm
C. ±0.25 mm
D. 0.005 mm
32. Accuracy is:
A. The smallest increment of difference in dimension that can be detected by an
instrument
B. The smallest increment of measurement that can be read on an instrument
C. The accuracy of the measurements of an instrument throughout its operating
range
D. The ability to measure the true magnitude of a dimension
33. Repeatability is:
A. The ability of the instrument to achieve the same degree of accuracy on repeated
applications
B. The smallest increment of difference in dimension that can be detected by an
instrument
C. The smallest increment of measurement that can be read on an instrument
D. The ability to measure the true magnitude of a dimension
34. Error in measurement is:
A. The difference between the indicated value and the true value of a measured
quantity
B. Practically zero
C. The sum of errors of both the operator and those errors of the measuring
instrument
D. The same value as the mean