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84 Cards in this Set

  • Front
  • Back

local notes or symbols

________ are used on drawings to specify tolerances and surface relationships

Standard

when a drawing is done, the drafter should note which _______ was used

Permissible error

Tolerance means the _________

.02

If the upper surface of a block is located by a ± .01 size tolerance from a bottom surface that is absolutley flat , and the upper surface can be curved by a maximum of:

-control of geometry


-dimensions

Design requires the ________ and ________ of a part

If Geometric tolerances are not specifed on a darwing, what controls the geometry?

Dimensions

what standard published by ASME caught on in america?

Y14.5 Standard

symbols can be drawn with ________ and a ____________

Triangle


circle template

_____________ are boxes with compartments showing symbols and values

Feature control Frames

how many features can a single plane surface have

it can have several different types of geometric tolerances

one way to apply frames is to attach to the __________ of the box for the frame to a slanted extension line

center edge

straightness

Flatness

Roundness

Roundness

Circularity

Cylindricity

Profile of line

profile of a surface

parallelism

perpendicularity

angularity

concentricity

circular runout

total runout

position

symmetry

what type of line cannot of have a feature control frame attached?

Center line

An example of a feature would be a

point, and edge a center line, or a plane or curved surface. can also be a a size, such as the width of a slot , groove, or tab

size feature

a dimension of a feature

error

an error is an unintentional, but acceptable, variation from a desired dimension

Lines point toward or away from a center and intersect the center

Radial

the size and form of a part may vary within an envelope between maximum and least conditions

MMC and LLC

has two definitions, general tolerance dimensions, it is a nominal dimension, as a geometric dimension it is a theoretically exact dimension that locates a tolerence zone. it has no tolerance

basic dimension

refers to a condition that can be expressed as an equation about the collective effects of the features size and geometric tolerance. The physical state of an object that results in the tightest fit with a mating part

Virtual Condition

what is the name of the area of the total permissible error of a geometric tolerance

Tolerance zone

what is the maximum material condition of a hole

Smallest size

what is the maximum material condition of a shaft

Largest size

which of the following is the symbol for maximum material condition

the virtual condition is the combination of the maximum material condition and the

Geometric Tolerance

What is the abbreviation of words that refer to the total movement of the probe of a dial indicator

FIM

what is the name of the theoretically exact surface from which geometric dimensions are measured

Datum

what is the name of a line, real or imaginary, that can be drawn on a surface, including flat surfaces, curved surfaces, and irregular surfaces.

Elements

the size of the shaft is produced is such that it contain the most material possible

maximum material condition

The geometric tolerance specified applies, no matter how big or small the feature can be produced

RFS

If geometric tolerances are not specified on a drawing, what controls the geometry

Dimensions

how many ways can an unsupported object move?

an infinite amount directions

So that parts can be made measured and used with consistency the drawn part is place in _________________

Datum reference frame

what features should you to choose to be datum references

Features that are readily accessible for manufacture and inspection

Datum features may be by _______ or by ________-

Plane


size


how do you choose MMC, RFS, LMS

look at characteristics such as clearance between parts and interference

what would be a proper datum

bearing surface

what letters are not used by themselves in an engineering drawing.

I, O, Q

where does a datum plane exist?

in theory only

what is a simulated datum

machine tool mounting surface


inspection fixture mounting surface


assembly fixture mounting surface

a reason to not use a datum reference frame

move parts between locations

datum features should be selected because

they are funtional


they are readily accessible


they are mating features

The MMC size of a hole is when the hole is

as small as it can be

determining the condition of a size datum is based on

the relationship between the mating parts

a datum target can be a

point


surface area


line

where are the datum target identifying letter and number placed in the datum target symbol

in the lower half

can be used to measure variations in most geometric characteristics

Dial Indicator

CMM cant do what?

move

must zero be at 12 o clock

no it dosent have to put to 12

full indicator movement is used to check parallelism and the FIM is .004 what is the minimum parallelism error

.004

what is the name of the part on a dial incator that rotates

bezel

if the movement observed on a dial indicator is .001 to the leeft and .003 to the right what is the FIM?

.004

what does the F in FIM stand for?

Full

a functional gage used for inspecting a machined part simulates the fit of the

mating part

in what direction does the pointer of a dial indicator move

clockwise and counterclockwise

what is the name of the cmm inspection surface?

surface plate

can the allowance and maximum clearancce be calculated without the addition of any geometric tolerance

yes an envelope of size exists between LMC and the MMC, within which all surface elements mucst lie

unless otherwise stated, all geometric tolerances and any size datums are applied RFS

the concept of virtual condition is used when there is a clearance between the datum feature and its mating part.

wht type of tolerance controls the form of a parts as well as the siae when no geometric tolerance is specified

external

when a geometric tolerance is applied to size feature which applies automaticall is

RFS

when a geometric toerance is applied to a size feature referenced to a geometrically controlled size datum, which condition applies to the datum feature?

virtual condition

The limits of size rule states that no element of a part shall extend beyond what boundary?

MMC

limits of size rule applies only to

individual features

the evelope principle makes possible the calculation of a __________--


allowance and maximum

what does A mean?

Position

what does  B mean? 

what does B mean?

shape symbol

what does C mean?

what does C mean?

tolerance zone

what does D mean

what does D mean

tolerance modifier

what does e mean?

what does e mean?

primary

what does F mean

what does F mean

secondary

what does G mean

what does G mean

tertiary