GD&T FINAL

Question 1

The flatness control is what?

Answer 1

two parallel planes

Question 2

flatness- per unit ares do what?

Answer 2

prevent abrupt surface changes.

Question 3

straightness of a surface is 2 or 3 D

Answer 3

2D
two parallel lines on a surface.
direction of measurement is parallel to the plane you are pointing to.
pointing to the surface means parallel lines on shaft.

Question 4

straightness of an axis is 2d or 3d

Answer 4

3D

point to the dimension means cylinder.

Question 5

Can any of the form tolerances have datum references in the feature control frame?

Answer 5

no.

Question 6

Can any of the form tolerances have feature modifiers applied?

Answer 6

yes, strightness of an axis.

Question 7

List the 2D form tolerances

Answer 7

straightness line elements, circularity.

Question 8

List the 3D form tolerances.

Answer 8

straightness of an axis, flatness, cylindricity.

Question 9

what rule in geometric tolerancing automatically controls the form of a feature within the specified limits of a size?

Answer 9

Rule #1

Question 10

Name the orientation tolerances

Answer 10

angularity, parallelism, perpendicularity

Question 11

are datums always required with orientation tolerances?

Answer 11

Yes

Question 12

which of the orientation symbols may be used in place of the other two symbols

Answer 12

Angularity.

Question 13

position control controls?

Answer 13

axis control
Axis to axis
does not control form

orientation
location

Question 14

total run out controls?

Answer 14

surface control
is tighter then position

form
orientation
location

Question 15

circular controls?

2d version of total run out.

Answer 15

2D
application for hoses pipes and stuff
controls the circularity of a single ring in the cylinder at a time.

Question 16

profile of a surface controls?

Answer 16

surface control
Form 
Orientation 
Location
Size

Question 17

what is the difference between total runout and position on a cylindrical part if the numbers are the same

Answer 17

Total run out controls the form.

Question 18

what can have a feature modifier of lmc or mmc applied
position
runout
profile

Answer 18

position.

Question 19

why would flatness per unit area be used on a surface?

Answer 19

To prevent abrupt surface changes

Question 20

what is the benefit of applying a perpendicularity at the value of 0 @ MMC for a cylindrical part.

Answer 20

It will give you more bonus size tolerance.

Question 21

what is the difference between referencing 1/2/3 datum features when specifying a perpendicular control

Answer 21

it restricts more degrees of freedom.

Question 22

when is composite position tolerance used?

Answer 22

when the pattern is more important to itself then to the DRF

Question 23

define rule #1

Answer 23

known as Taylor and envelope principle. 
thereoticly perfect
perfect form at MMC
no relation between features. 
Defines size and form limits.