Technical Drafting SkillsUSA review
A single threaded screw on a jack has 8 threads per inch. If the screw is rotated 4 complete turns, the object the jack is lifting will have moved ____.
1/2 inches
ANSI standards require that text to be no smaller than_____.
1/8"
The angle between the three axes of an isometric drawing is:
120 degrees
What is the minimum degree division that a circle can be divided into when using the 30-60 and 45 triangles in combination?
15
What is the smallest angular increment that can be obtained by using the two standard triangles?
15 degrees
The circumference of a circle is found by using the formula_____.
2 pi X r
If a hole is dimensioned 2.3508 + 0.0005, -0.0001, its mean size is ____.
2.3510
To convert inches to millimeters, multiply inches by___.
25.4
What is the minimum number of points needed to define a plane?
3
What is the weight of a 4" diameter steel bar 9" long, if 4" diameter steel weighs 42.73 lbs/foot?
32 lbs
In the equation A/B=C/D, if A=8, B=12, C=24, "D" must be equal to_____.
36
The sum of 10.4 mm, 57.8 cm, and 4.06 m expressed in meters is______.
4.6484
196.85 inches expressed in meters would be_____.
5
How large in an "A" sheet of drawing paper?
8-1/2" x 11"
Countersink
A funnel-like bevel at the surface end of drilled hole; the standard included angle is 82 degrees.
Fillet
A small rounded interior corner of an object.
Symmetry
An object being the same on both sides of a centerline.
Development of CAD software is normally the responsibility of the______.
CAD manufacturer
What are the three types of oblique drawings that are normally created?
Cabinet, cavalier, and general
What can be obtained on a company in the Thomas Register?
Company name, Product, Yearly Sales, Address, Phone Number
When a casting is to be finished on all surfaces, the drawing should contain the abbreviated notation ____.
F.A.O= Finish all over
A centerline should be drawn as a thick, dark line. True or false?
False
The purpose of an auxiliary view is to show the true size and shape of an object and the relationship of its features when they are parallel to any of the principle planes of projection. True or False?
False
_____is an external storage device in a computer workstation.
Flash drive
_____ is not part of the CAD hardware.
Flexible disk
______means something is not shown in its true length.
Foreshortened
______is used to store drawing when using a PC CAD package.
Hard disk
____ has a cutting-plane line to pick up features that are not along a common cutting plane.
Offset section
____ refers to an object ability to allow light to pass through it.
Opaqueness
______is a line used to extend features from one view to another.
Projection line
The abbreviation for quantity is_____.
QTY
In a CAD system, a power failure will cause the loss of the____.
RAM
_____is used to record all changes that are made to a drawing.
Revision block
______ is not sectioned in an assembly section.
Shafts, bolts, nuts, pins, keys, rivets, and gear teeth
A mechanical CAD drafter normally uses which reference catalogs the most:
Thomas Register, Machinist Handbook, and Sweets Catalog
3D
Three dimensional
An assembly drawing is a working drawing. True or false?
True
Bench mark does not apply to a perspective drawing. True or false?
True
In a group of parallel dimension lines, that numeral should be staggered, not stacked one above the other. True or false?
True
The first step in visualizing an orthographic projection is to visualize the six possible views of an object that are revolved into the same plane as the drawing surface. True or false?
True
The tangent point between a straight line and a circle is determined by______.
a line from the circle center perpendicular to the straight line
An oblique plane is_____.
a plane that is foreshortened in all three principle viewing plane
A 3D drawing differs from a 2D drawing because_____.
a title block can not be added
In third-angle orthographic projection, the top view of an object must be shown_____.
above the front view
What type of angle has less than 90 degrees?
acute
The reason for draft on a pattern is to_____.
aid the molder in removing the pattern from the sand
An aligned system of dimensioning is one in which_____.
all dimensions can be read from the bottom and right side of the drawing.
A protractor is used to measure_____.
angles
One of the ways to proportion a sketch is by the ____.
approximation by eye method
Isometric, trimetric, and dimetric are examples of ______.
axonometric drawings
In 3/4-10 UNC-2B, what does 2 refer to?
class of thread
What it the name of the tool used to draw a circle?
compass
If asked to produce a plot at 1/4" scale, you would______.
create a drawing at 1"-1" and plot at 1/4"=1"
A_______contains enough information to manufacture a particular item.
detail drawing
An example of a drawing parameter is______.
drawing size
When recording a drawing revision,____ is needed.
drawing size
A circle in an isometric drawing appears as an______.
ellipse
A common error made when constructing an isometric drawing is:
ellipses are not drawn in the proper plane
Inside corners on a casting have_____.
fillet
The three principle views used in orthographic projection are_____.
front, top, and right side
An "Obtuse" angle is an angle that is____.
greater than 90 degrees
When a cutting plane passes through an object removing 1/4 of it, the section is called ____.
half
A shaft is to fit into a hole with a 0.001" to 0.003" lost fit. If the hole is 1.500" - 1.501" in diameter the Basic Hole System of fit is used, what should be the shaft diameter?
high limit of 1.499", low limit of 1.498"
In manufactured parts, jigs are used to___.
hold the part and guide the machining tool
With the unidirectional system of dimensioning, dimension figures are lettered_____.
horizonally
An extension line is used to:
indicate the extension of a surface or a point to a location outside the part outline.
In 3/4-10 UNC-2B, what does B refer to?
internal thread
Text that is used to clarify graphic information is called______.
label/note
How should drafter make horizontal strokes in lettering?
left to right
CAD is considered a tool that is used to manipulate entities/objects in order to create drawing. _____ is a good example.
line
In the thread 1/4-20 UNC-2A, the 1/4 describes the _____.
major diameter
____ is an input device for a CAD work station.
mouse
CAD software that is loaded into a computer are "shared" by users on a terminal is_____.
networked
In 3/4-10 UNC-2B, what does 3/4 refer to?
nominal diameter
A line is true length if it is what, compared to the projection plane in the previous view?
parallel
The tangent point of a straight line and an arc is located by drawing a____.
perpendicular to the line from the arc's center
The true length of a line will appear when it is drawn_____.
perpendicular to the line of sight
The term "hardcopy" refers to_____.
plotted drawings
What kind of computer memory is NOT accessible to the user and may be read but not written______.
read-only memory (ROM)
If a file is renamed, the file content will_____.
remain unchanged
Sections that are drawn elsewhere on the sheet are_____.
removed sections
In selecting the views for an assembly, the purpose that must be kept in mind is___.
showing the parts as they fit together
The most accepted method of drawing screw thread is _____.
simplified
An object 5" x 6" x 10", fully dimensioned and drawn full scale, would require a paper of which size?
size D
The two types of dimensions found on an ANSI standard drawing are______.
size and location
The program on a disk or tape used in a CAD system is referred to as_____.
software
SR
spherical radius
How does forging affect the metal?
strengthens
The type of dimensioning that uses letters to represent various sizes on a drawing is______.
tabular
NPT pipe threads are distinguished by being _____.
tapered
When defined, orthographic means____.
the lines of projection are parallel and at right angles to the planes of projection
Which view is usually selected for the front view in an orthographic projection?
the most descriptive
Orthographic projection is a term used to describe_____.
third angle projection
The type of projection that is normally used in the US is______.
third angle projection
In 3/4-10 UNC-2B, what does UNC refer to?
thread form
In 3/4-10 UNC-2B, what does 10 refer to?
threads per inch
In what direction should a drafter make vertical, slopped, and curved strokes in lettering?
top to bottom
What system of dimensioning will a drafter use so that all dimensions are facing in the same direction?
unidirectional
Dimensions on an auxiliary drawing should be placed on the______.
view where the feature is true size
What formula is used to find the area of circle?
π r^2
