Question 1

Undercutting creates a rough surface by applying pressure to a cylindrical object, forcing the surface material outward against the rollers.

Accepted Answer

Undercutting refers to the process of making a cut or groove under an existing surface or edge, not to creating a rough surface by applying pressure to a cylindrical object against rollers.

Question 2

A 64DP knurl is coarser than a 128DP knurl.

Accepted Answer

A 64DP (Diametral Pitch) knurl is finer than a 128DP knurl because the DP value indicates how many teeth per inch are on the knurling tool, so a higher DP means more teeth per inch and thus a finer pattern.

Question 3

Which of the following is NOT a purpose of undercutting?&#10;A)To remove a fillet where the diameter of the part increases&#10;B)To provide a gripping surface&#10;C)To produce a recess in a cylindrical part

Accepted Answer

Undercutting is a machining process used to create a recess or groove in a part, often for purposes such as removing a fillet where the diameter of a part increases (A) or producing a recess in a cylindrical part (C). It is not typically done to provide a gripping surface (B); other machining processes or features are designed for that purpose.

Question 4

Knurling is generally dimensioned by specifying:&#10;A)the length of knurl and diameter of the shaft before knurling.&#10;B)the type, pitch, length of knurl, and diameter of the shaft before knurling.&#10;C)the type, pitch, length of knurl, and diameter of the shaft after knurling.

Accepted Answer

Knurling is dimensioned by specifying the type of knurl (e.g., straight, diagonal, diamond), the pitch (distance between the peaks of the knurl), the length of the knurled section, and the diameter of the shaft before knurling. This information ensures that the knurling process meets the design requirements and fits properly with other components.

Question 5

&#34;Necking&#34; is another term for &#34;undercutting&#34;.

Accepted Answer

The answer of &#34;Necking&#34; is another term for &#34;undercutting&#34;....

Question 6

Knurling can produce a straight or a diamond-shaped pattern on a cylindrical object.

Accepted Answer

Knurling is a manufacturing process that can produce both straight (linear) and diamond-shaped (cross) patterns on the surface of cylindrical objects for improved grip or aesthetic purposes.

Question 7

Which of the following is NOT a purpose of knurling?&#10;A)To improve the appearance of the part&#10;B)To provide a gripping surface&#10;C)To decrease the diameter of the part

Accepted Answer

Knurling is a manufacturing process used to add a patterned texture to the surface of a part, primarily to improve grip or for aesthetic purposes. It does not decrease the diameter of the part; instead, it modifies the surface without significantly altering the part's overall dimensions.

Question 8

Undercuts are usually dimensioned with:&#10;A)A leader and a note specifying the width of the undercut.&#10;B)A leader and a note specifying the width of the undercut and the diameter or depth.&#10;C)A leader and a note specifying the diameter or depth.

Accepted Answer

Undercuts are typically dimensioned with a leader and a note that specifies both the width of the undercut and the diameter or depth, to provide complete information for manufacturing.

Deck 21: Undercuts and Knurling