Technical Drafting SkillsUSA review

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

\____ has a cutting-plane line to pick up features that are not along a common cutting plane.

Offset section

An extension line is used to:

indicate the extension of a surface or a point to a location outside the part outline.

Countersink

A funnel-like bevel at the surface end of drilled hole; the standard included angle is 82 degrees.

SR

spherical radius

Isometric, trimetric, and dimetric are examples of \______.

axonometric drawings

A common error made when constructing an isometric drawing is:

ellipses are not drawn in the proper plane

A mechanical CAD drafter normally uses which reference catalogs the most:

Thomas Register, Machinist Handbook, and Sweets Catalog

What can be obtained on a company in the Thomas Register?

Company name, Product, Yearly Sales, Address, Phone Number

An assembly drawing is a working drawing. True or false?

True

A\_______contains enough information to manufacture a particular item.

detail drawing

What are the three types of oblique drawings that are normally created?

Cabinet, cavalier, and general

Fillet

A small rounded interior corner of an object.

\______ is not sectioned in an assembly section.

Shafts, bolts, nuts, pins, keys, rivets, and gear teeth

In 3/4-10 UNC-2B, what does 3/4 refer to?

nominal diameter

In 3/4-10 UNC-2B, what does 10 refer to?

threads per inch

In 3/4-10 UNC-2B, what does UNC refer to?

thread form

In 3/4-10 UNC-2B, what does 2 refer to?

class of thread

In 3/4-10 UNC-2B, what does B refer to?

internal thread

The angle between the three axes of an isometric drawing is:

120 degrees

With the unidirectional system of dimensioning, dimension figures are lettered\_____.

horizonally

What is the weight of a 4" diameter steel bar 9" long, if 4" diameter steel weighs 42.73 lbs/foot?

32 lbs

If a hole is dimensioned 2.3508 + 0.0005, -0.0001, its mean size is \____.

2.3510

When a casting is to be finished on all surfaces, the drawing should contain the abbreviated notation \____.

F.A.O\= Finish all over

Sections that are drawn elsewhere on the sheet are\_____.

removed sections

When a cutting plane passes through an object removing 1/4 of it, the section is called \____.

half

The most accepted method of drawing screw thread is \_____.

simplified

NPT pipe threads are distinguished by being \_____.

tapered

In the thread 1/4-20 UNC-2A, the 1/4 describes the \_____.

major diameter

In manufactured parts, jigs are used to\___.

hold the part and guide the machining tool

Inside corners on a casting have\_____.

fillet

How does forging affect the metal?

strengthens

The reason for draft on a pattern is to\_____.

aid the molder in removing the pattern from the sand

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 selecting the views for an assembly, the purpose that must be kept in mind is\___.

showing the parts as they fit together

An object 5" x 6" x 10", fully dimensioned and drawn full scale, would require a paper of which size?

size D

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

The circumference of a circle is found by using the formula\_____.

2 pi X r

What formula is used to find the area of circle?

π r^2

Orthographic projection is a term used to describe\_____.

third angle projection

The three principle views used in orthographic projection are\_____.

front, top, and right side

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

Which view is usually selected for the front view in an orthographic projection?

the most descriptive

In third-angle orthographic projection, the top view of an object must be shown\_____.

above the front view

When defined, orthographic means\____.

the lines of projection are parallel and at right angles to the planes of projection

How large in an "A" sheet of drawing paper?

8-1/2" x 11"

The term "hardcopy" refers to\_____.

plotted drawings

ANSI standards require that text to be no smaller than\_____.

1/8"

How should drafter make horizontal strokes in lettering?

left to right

The tangent point of a straight line and an arc is located by drawing a\____.

perpendicular to the line from the arc's center

A circle in an isometric drawing appears as an\______.

ellipse

The abbreviation for quantity is\_____.

QTY

What is the smallest angular increment that can be obtained by using the two standard triangles?

15 degrees

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

What type of angle has less than 90 degrees?

acute

Bench mark does not apply to a perspective drawing. True or false?

True

Dimensions on an auxiliary drawing should be placed on the\______.

view where the feature is true size

\____ is an input device for a CAD work station.

mouse

What kind of computer memory is NOT accessible to the user and may be read but not written\______.

read-only memory (ROM)

\_____is an external storage device in a computer workstation.

Flash drive

If a file is renamed, the file content will\_____.

remain unchanged

CAD software that is loaded into a computer are "shared" by users on a terminal is\_____.

networked

Development of CAD software is normally the responsibility of the\______.

CAD manufacturer

If asked to produce a plot at 1/4" scale, you would\______.

create a drawing at 1"-1" and plot at 1/4"\=1"

\______is a line used to extend features from one view to another.

Projection line

The type of projection that is normally used in the US is\______.

third angle projection

\______means something is not shown in its true length.

Foreshortened

An oblique plane is\_____.

a plane that is foreshortened in all three principle viewing plane

Symmetry

An object being the same on both sides of a centerline.

The two types of dimensions found on an ANSI standard drawing are\______.

size and location

An aligned system of dimensioning is one in which\_____.

all dimensions can be read from the bottom and right side of the drawing.

In a group of parallel dimension lines, that numeral should be staggered, not stacked one above the other. True or false?

True

\_____is used to record all changes that are made to a drawing.

Revision block

A centerline should be drawn as a thick, dark line. True or false?

False

One of the ways to proportion a sketch is by the \____.

approximation by eye method

\____ refers to an object ability to allow light to pass through it.

Opaqueness

An "Obtuse" angle is an angle that is\____.

greater than 90 degrees

In a CAD system, a power failure will cause the loss of the\____.

RAM

\______is used to store drawing when using a PC CAD package.

Hard disk

\_____ is not part of the CAD hardware.

Flexible disk

The program on a disk or tape used in a CAD system is referred to as\_____.

software

When recording a drawing revision,\____ is needed.

drawing size

CAD is considered a tool that is used to manipulate entities/objects in order to create drawing. \_____ is a good example.

line

3D

Three dimensional

A 3D drawing differs from a 2D drawing because\_____.

a title block can not be added

A protractor is used to measure\_____.

angles

The tangent point between a straight line and a circle is determined by\______.

a line from the circle center perpendicular to the straight line

To convert inches to millimeters, multiply inches by\___.

25.4

In the equation A/B\=C/D, if A\=8, B\=12, C\=24, "D" must be equal to\_____.

36

What is the minimum degree division that a circle can be divided into when using the 30-60 and 45 triangles in combination?

15

The type of dimensioning that uses letters to represent various sizes on a drawing is\______.

tabular

An example of a drawing parameter is\______.

drawing size

Text that is used to clarify graphic information is called\______.

label/note

What is the minimum number of points needed to define a plane?

3

What it the name of the tool used to draw a circle?

compass

196.85 inches expressed in meters would be\_____.

5

The sum of 10.4 mm, 57.8 cm, and 4.06 m expressed in meters is\______.

4.6484

The true length of a line will appear when it is drawn\_____.

perpendicular to the line of sight

A line is true length if it is what, compared to the projection plane in the previous view?

parallel