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