Final test in drafting Flashcards
when giving local notes, a leader line should be attached at the ______ of the first word of a not or just after the ______ word but not any intermediate place
front
last
dimensions should be so given that it will not be necessary for the machinist to calculate, scale, or assume any dimensions.
true
dimensions should be attached to the view where the shape is best known (contour rule)
true
avoid dimensioning to hidden lines wherever possible
true
dimensions applying to two adjacent views should be placed in the space outside the views, placing them between views clutters the drawing
false
the lead is the distance a screw advances axially in a single turn
true
dimensions should be given between points or surfaces that have the functional relation to each other or that control the location of mating parts.
true
circle with m in it means
maximum material condition
the distance from a point on a screw thread to a corresponding point on the next thread measured parallel to the axis
pitch
the standard thread essentially the same as the american national except for the crest of the external thread may be flat or rounded and the root is rounded
unified thread
to determine the pitch for threads dimensioned in inches the pitch is
equal to 1 divided by number of threads per inch for each standard diameter
in a single thread lead is equal to the
pitch
acme thread is modification of square thread, stronger,easier to cut and disengage
true
allowance is the difference between the largest allowable shaft size and the smallest allowable hole size
true
tolerance is the difference between the largest allowable shaft size and the smallest allowable hole size
false
a rounded interior transition between surfaces is
fillet
cylindrical recess around a hole is `
counterbore
small groove cut around the diameter of a cylinder
neck
hollow cylinder that is often used as a protective sleeve or guide
bushing
an angled surface (beveled edge), used on cylinders to make them easier to start into a hole, or plates to make it easier to handle
chamfer
when a drawing is too large for the space provided and views cannot be aligned a ————– can be used
removed view
when it is not necessary to complete a view to clearly describe an object a _______ can be drawn
partial view
a removed view may also be a partial view
true
a _____ is a pictorial drawing
perspective
oblique
axonometeric
a trimetric projection has equal foreshortening along each of the three axis directions
false
isometric angle is
120*
this is an axonomometric projection of an object in which two of its axis make equal angle with plane of projection
dimetric
isometric cylinder is
oval
oblique cylinder is
circle
when receding units (depth lines) are longer than horizontal and vertical units in an oblique drawing it is called
cavalier projection
when receding lines are drawn to half size, the oblique is
cabinet projection
a _______ auxiliary view is projected ona plane that is perpendiculr to one of the pricipal planes of projection and is inclined to the other two is
primary`
A view obtained by a projection on a plane other than the horizontal, frontal, and profile projections planes is called
auxiliary view
auxiliary views produce views that show
true length of line
point of view of line
edge view of surface
projectors are parallel , and perpendicular to the plane of projection
parallel projection
a projection or drawing is produced on a plane by points where _____ pierce the plane of projection
projectors
a scale in which the basic units are subdivided throughout the length of the scale is a
full divided scale
scale for drawing maps
engineers
scale for drawing buildings
architecture
cutting plane lines and short break lines
thick dark lines
construction lines and guidelines
light crisp lines
standard height of lettering
1/8
plane of projection top view is
horizontal view
