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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
using gages to determine if a product is good or bad resulting in a yes/no, go/no go decision	What is an attribute?
using calibrated instruments to determine the actual dimensions of the product for comparison with the desired.	what is variable inspection?
accuracy is hitting the same target consistently, precision is repeatability	difference between accuracy precision
when largest shaft is smaller than smallest hole	what is a clearance fit?
when the hole is smaller than the largest shaft	What is interference fits?
large allowance; accuracy not imporant.	What is a loose fit?
liberal allowance; running fits where speeds are above 600 rpm pressure above 600 psi	free fit?
medium allowance; running fits where speeds are below 600 rpm pressure less than 600 psi for sliding fits	what is a medium fit
zero allowance; no movement under load intended no shaking wanted. tightest fit assembable by hand.	snug fit
zero to negative allowance; assemblies are selective not interchangeable	wringing fit
slight negative allowance; used in light loads an interference fit	tight fit?
an interference fit requiring considerable pressure to assemble, used for fastening wheels, crank disks, and the like to shafting; tightest fit for cast iron	medium-force fit?
considerable negative allowance, used for permanent shrink fits on steel members	heavy force and shrink fits
the difference between the two limits of size of a part, an absolute amt without signs.	what is tolerance
when an assembly has either clearance or interference fits	what is a transition fit?
max allowable deviation of a form or position from the perfect geometry implied by a drawing.	what is geometric tolerances
a part made with the largest amt of material allowable	what is mmc