Deck 16: Size Datum Features Mmb

Question 1

Where a pattern of holes is used as a datum feature, the spacing between the holes should be defined.

Answer 1

True

Question 2

When referencing a planar surface as a primary datum feature, a diameter as a secondary datum feature MMB, and a width as a tertiary datum feature MMB, the part will have a minimum of four-point contact with the primary datum feature simulator.

Answer 2

False

Question 3

Where a diameter is used as a primary datum feature at MMB, ____________________ degrees of freedom are constrained.

Answer 3

four
4

Question 4

When referencing a planar surface as a primary datum and a diameter as a secondary datum feature MMB, what six conditions apply?

Question 5

Devices that are fixed in size, such as a precision hole, width, or pin, may be used as the datum feature simulator.

Question 6

What is the formula for a primary datum feature MMC size calculation for a simple application (no straightness or flatness applied to the size dimension of the datum feature)?

Question 7

What are the two effects that occur where a datum feature is referenced at MMB?

Question 8

When referencing a planar surface as a primary datum feature and a pattern of holes as a secondary datum feature MMB, ____________________ degrees of freedom are constrained.

Question 9

Where a coaxial datum feature is referenced at MMB, two degrees of freedom are constrained.

Question 10

____________________ is the allowable movement or looseness between the part datum feature and the datum feature simulator.

Question 11

Where a feature of size datum feature is referenced as a primary datum feature at MMC, the datum feature simulator is a fixed-size.

Question 12

Where a width is used as a datum feature at MMB, ____________________ degrees of freedom are constrained.

Question 13

The ____________________ is the boundary established by the collective effects of the MMC of a datum feature and any applicable tolerances.

Question 14

Explain where datum shift is additive to a geometric tolerance and where it is not.

Question 15

When referencing coaxial diameters as primary co-datums MMB, what six conditions apply?