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Flashcards in QUIZ 3 Deck (38):
1

How to apply flatness per unit area 10 X 10.

Composite FCF
Top - Positional Tolerance
Bottom - x.xx / 10 X 10

2

Explain why flatness per unit area might be used on a surface?

To prevent abrupt surface variation within a small area

3

Apply an additional orientation control to restrict the tilt of the hole to be within .001.

Perpendicularity, angularity, parallelism

Diameter symbol ( if a hole or cylinder ) - positional tolerance

Reference Datum A and B

4

Explain the benefit of specifying perpendicularity at a value of 0 at MMC for a cylindrical part?

Provides more size tolerance and is easier to manufacture

5

Explain the difference between referencing 1/2/3 datum features when specifying a perpendicularity control?

The more datums that are referenced, the more degree of freedom that are restricted .

6

MIN/MAX Dimensions - Encircled U

ADD MATERIAL / Watch for all around symbol

Holes get smaller, external features get bigger

7

MIN/MAX Dimensions - profile composite - application

Composite - Top half for dimensions locating feature to the part, bottom half for dimensions locating feature to itself
Composite application - stamping / irregular features

8

Rectangular tolerance zone

Dimension hole height and hole width
FCF
Position | Positional Tolerance / MMC or LMC ( if specified ) | Reference A, B, and C

Make any related dimensions basic


9

Equation for MMB/ definition for MMB

mmc +/- positional tolerance


MMB - wiggle room - bonus tolerance - fixture clearance

10

Provide an example where composite positional tolerance may be used?

Pattern of holes that locate emblem or name plate - holes location to itself are more important to location to drf - hole pattern more important

11

Profile of a surface - coaxial control

surface to axis including size (3d)

form, orientation, location, size

12

Profile of a line - coaxial control

surface to axis including size (2d)

form,orientation,location,size

13

Total Runout - coaxial control

surface to axis (2D)

3d form ( cylindricity, straightness, taper), orientation, location

14

Circular runout - coaxial control

surface to axis (3d)

2d form (circularity), orientation, location

15

Straightness tolerance zone shape

2 parallel lines (2d)

16

Flatness tolerance zone shape

2 parallel planes (3d)

17

circularity tolerance zone shape

2 concentric circles(2d)

18

cylindricity tolerance zone shape

2 concentric cylinders(3d)

19

straightness - axis tolerance zone shape

cylindrical (3d)

20

flatness median plane tolerance zone shape

2 parallel planes (3d)

21

orientation tolerance zone shape

Feature modifier?

angularity, parallelism, perpendicularity

2 parallel lines (2d)
2 parallel planes (3d)
cylindrical (3d)

FM - yes, if it is a feature of size , no if feature is surface

22

profile of a line tolerance zone shape

2 dimensional uniform boundary

23

profile of a surface tolerance zone shape

3 dimensional uniform boundary

24

circular runout tolerance zone shapes

2 concentric circles about a datum axis

2 concentric cirular line elements about a datum axis (2D)

NO APPLICATION OF FEATURE MODIFIER - SURFACE CONTROL

25

total runout tolerance zone shapes

2 concentric cylinders about a datum axis

2 parallel planes perpendicular to a datum axis (3D)

NO APPLICATION OF FEATURE MODIFIER - SURFACE CONTROL

26

position - coaxial control

axis to axis

controls
orientation, location

27

what are the 2d form tolerances?

straightness of a surface, circularity

28

true or false,

a feature modifier may be used with perpendicularity?

true

29

why might a continuous feature control used?

size tolerance does not control relationship between features

30

true or false

cylindricity can be specified at MMC/LMC??

False -

31

true or false

the orientation controls also locate features?

FALSE

32

what are the straightness tolerance zone shapes

cylinder or 2 parallel lines

33

true or false

position can be a 2d control when applied to 2d line elements

false

34

a tangent plane specification will not control the ....?

form

35

describe the key difference between a runout/profile control when applying coaxial tolerances

profile includes size

36

which form tolerancces are allowed to use a feature modifier ?

straightness (feature of size) , flatness of a median plane

37

how is a composite profile applied and what does it accomplish?

the first half locates the features to the DRF, 2nd half locates feature to itself and orientation only to DRF

stamping / irregular features

38

what are all of the possible tolerance zone shapes for orientation

cylinder
2 parallel lines
2 parallel planes