Deck 13: The Datum System

Question 1

The datum feature symbol should be specified to be read from the top of a drawing.

Answer 1

False

Question 2

The datum system is a set of symbols and rules on how to constrain a part to establish a relationship between the part and ____________________ tolerance zones.

Answer 2

geometric

Question 3

Where a datum feature symbol or a datum reference frame symbol is repeated on a drawing, it is not necessary to designate them as reference.

Answer 3

True

Question 4

____________________ is a limit to one or more degrees of freedom.

Question 5

A datum is the origin for dimensional measurements.

Question 6

There are two types of datum feature simulators: ____________________ and physical.

Question 7

Explain the 3-2-1 Rule.

Question 8

Discuss the composition of a datum system.

Question 9

What dimensions should be measured in a datum reference frame?

Question 10

What are the benefits of the datum system?

Question 11

____________________ is two or more surfaces having all elements on one plane.

Question 12

When dimensioning the location of a feature of size on a part, implied datums should be used.

Question 13

Whenever a planar surface is used as a primary datum feature, a(n) ____________________ tolerance should be applied to the surface.

Question 14

What are the two major shortcomings of implied datums?

Question 15

An implied datum is an assumed plane, axis, or point from which a dimensional measurement is made.