Question 1

The surface characteristic that is most often regarded as critical is:&#10;A)Lay&#10;B)Roughness height&#10;C)Roughness width

Accepted Answer

B

Question 2

A surface roughness microinch measurement of &#34;125&#34; represents:&#10;A)A surface that is rougher than a surface whose roughness is &#34;63&#34;&#10;B)A surface that is not as rough as a surface whose roughness is &#34;63&#34;

Accepted Answer

A higher microinch measurement indicates a rougher surface, so "125" is rougher than "63".

Question 3

Cold rolling produces a smoother surface roughness than hot rolling.

Accepted Answer

Cold rolling is a metalworking process that occurs at or near room temperature, which allows for more precise control over the final surface finish, resulting in a smoother surface roughness compared to hot rolling, where the metal is processed at high temperatures.

Question 4

The arithmetical average of the deviation from the mean line is called:&#10;A)Waviness&#10;B)Waviness&#10;C)Roughness height&#10;D)Roughness width

Accepted Answer

Roughness height is the correct term for the arithmetical average of the deviation from the mean line, as it quantifies the vertical deviations of a real surface from its ideal form.

Question 5

Surface texture symbols should:&#10;A)Be shown for every surface on a part&#10;B)Be repeated in adjacent views of the same surface&#10;C)Be expressed in the SI metric system to ensure the best control&#10;D)Only appear once on a drawing for each surface that is controlled by a surface texture symbol

Accepted Answer

Surface texture symbols are used to specify the surface finish of parts and should only appear once on a drawing for each surface that is controlled by a surface texture symbol. This avoids redundancy and potential confusion.

Question 6

The predominant direction of surface roughness is called:&#10;A)Waviness&#10;B)Lay&#10;C)Roughness&#10;D)Roughness width

Accepted Answer

Lay refers to the predominant direction of the surface pattern, often determined by the manufacturing process, such as machining, grinding, or polishing, which leaves characteristic marks or patterns on the surface.

Question 7

The larger undulations of a surface that lie below the surface roughness marks is called:&#10;A)Lay&#10;B)Roughness&#10;C)Roughness height&#10;D)Waviness

Accepted Answer

Waviness refers to the larger undulations of a surface that are below the finer surface roughness marks. These are typically more spread out and less frequent than the small imperfections that constitute roughness.

Question 8

The degree of roughness allowed on a machined surface is:&#10;A)Waviness&#10;B)Roughness width cutoff&#10;C)Surface texture&#10;D)Flaws

Accepted Answer

Surface texture encompasses the degree of roughness on a machined surface, including all variations in the surface's topography.

Question 9

Surface control should be applied to every surface on a part

Accepted Answer

Surface control should be applied selectively based on the functional requirements and critical features of the part, not necessarily to every surface.

Question 10

When both minimum and maximum roughness are specified:&#10;A)The minimum limit is placed on top&#10;B)The maximum limit is placed on top&#10;C)The minimum roughness should be ignored

Accepted Answer

The maximum limit is placed on top when both minimum and maximum roughness are specified, to indicate the upper limit of surface roughness that is acceptable.

Question 11

The instrument used to measure roughness height is a profilometer.

Accepted Answer

The answer of The instrument used to measure roughness height...

Question 12

An ISO &#34;N6&#34; roughness is comparable to:&#10;A)16 microinches&#10;B)32 microinches&#10;C)63 microinches&#10;D)125 microinches

Accepted Answer

The answer of An ISO &#34;N6&#34; roughness is comparable to:&#10;A)16...

Deck 19: Surface Texture