Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 |
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? |
shape symbol |
|
what does C mean? |
tolerance zone |
|
what does D mean |
tolerance modifier |
|
what does e mean? |
primary |
|
what does F mean |
secondary |
|
what does G mean |
tertiary |