Technical Drawings and Schematics

The loosest fit of two parts can be determined by subtracting the ______ of the shaft from the _______ of the hole.

(LMC) Least Material Condition

A drawing revision may include three different ways of changing information. List them.

- Delete - Cross out - Change value/ view

A(n) ____________drawing transforms one part into another part, establishing a new part number, while a(n) ______________ drawing is created to show how to modify a part that has already come in the door.

- altered-item - modification

In the US, industrial prints use the ____ angle projection system, whereas many other countries use the __________ angle projection system.

- third - first

An inclined surface will appear as a ___________ in one view and as a foreshortened shape in ____ views.

-Line -2

Name three factors that identify dimensioning mechanics.

-What dimensions look like -Where dimensions are placed -Which dimensions are used

Leader lines have a _________ on one end and a ___________ on the other.

-arrowhead -shoulder

Given two circles tangent to one another, how do you find the point of tangency?

-connect the center points of the circles, the POT coincides with the segment connecting the center points.

List three examples of purchased parts that do not need detail drawings, but might still be illustrated in an assembly drawing.

-nuts -bolts -fasteners

Give two reasons a cylindrical part might feature a neck, groove, or undercut.

-to accommodate a retaining ring -to provide a good transition between features

Amount of gap between extension lines and the object

1/16"

Amount of extension lines beyond the arrowhead

1/8"

Length of the arrowhead

1/8" long

Height of the lettering

1/8" tall

The dimension line should be a minimum distance of ______ form the object.

3/8"

What is an inseparable assembly drawing?

A drawing composed of two or more parts that, once assembled, are permanently joined and thus become one unit.

The type of section view where the section view is no longer aligned in projection with other views is: A. removed B. revolved C. broken-out D. offset

A. Removed

Which of the following is NOT an accepted method for maintaining revisions of multisheet drawings? A. Revisions are not shown on any sheets, but kept in separate files. B. One revision letter for all sheets, one revision history block on sheet one. C. Each sheet maintains it's own revision letter; each sheet is totally independent. D. Each sheet maintains it's own revision letter; all sheets affected by a revision obtain the same revision letter as a result of that revision.

A. Revisions are not shown on any sheets, but kept in separate files.

Drawn sometimes, usually or always? A. Hidden Lines B. Center Lines C. Dimensions

A. Sometimes drawn B. Usually drawn C. Sometimes drawn

What ASME standard is the resource for drawing revision systems?

ASME Y14.35M: Revision of Engineering Drawings and Associated Documents.

An object with an odd number of features (spokes, holes, etc) often has a(n) _______________ section so the odd features can be rotated around the axis into a vertical cutting plane, resulting in a view that is easier to read and more informative.

Aligned

Which of the following letters should be skipped in an on-going progression of revisions? A. I B. O C. S D. X

All of them because they can be confused for numbers

________ is another term for tightest fit.

Allowance

ANSI

American National Standards Institute

ASME

American Society of Mechanical Engineers

What term applies to a surface that has been identified as a reference surface from which measurements are to be taken? A. Axis B. Datum C. Flat D.Reference

B. Datum

Which of the following is usually NOT provided by an assembly drawing? A. An assembly name and number B. Surface texture symbols for each part C. A list of materials (parts) D. Overall size and location dimensions necessary for critical information.

B. Surface texture symbols for each part

Of the following, which is a common reason to use an auxiliary view? A. To show a turned and tilted view of a normal surface B. To show the true size and shape of an inclined surface. C. To show the object as if it has been cut in half. D. When the title block gets in the way of a normal right side view.

B. To show the true size and shape of an inclined surface.

A beveled edge is called a: A. fillet B. chamfer C. machining center D. datum

B. chamfer

_________are shown on an assembly drawing to reference parts back to the list of material.

Balloons

The ___________size of a feature or object is often defined as the target value for the size, with tolerances applied in one or both directions.

Basic

Which of the following drawings is usually of an unfinished product? A. Purchased part control drawing B. Machining drawing C. Casting drawing D. Altered-item drawing

C. Casting Drawing

Of the following, which is not a type of section view featured in this unit? A. Full B. Half C. Quarter D. Offset

C. Quarter

Which of the following drawing types is technically an assembly drawing? A. Metal B. Development C. Welding D. Installation

C. Welding

A(n) _________ assembly drawing uses symbols for the parts. An example would be a piping and wiring flow diagram where the pipes are shown as lines and components like pumps and valves are shown as symbols. A. pipe B. schematic C. diagram D. exploded

C. diagram

A pattern of ridges cut or formed into a metal cylindrical handle to provide grip or increase a diameter is a: A. broach B. thread C. knurl D. spline

C. knurl

A half section view features a sectional view in combination with a regular view. What type of line should be used to separate these two views?

Center Line

What is the term for lining sub dimensions arrowhead to arrowhead across the view?

Chain dimensioning

What does CAGE Code stand for?

Commercial And Government Entity

What term is applied to placing dimensions in the view where the shape is shown?

Contour Dimensioning

The term for a generally accepted way of doing things is _________.

Convention

A print can be simply defined as a ______ of a drawing.

Copy

A conical enlargement on one end of a hole is called a(n)___________________

Countersink

If there is not room to show an auxiliary view projected in alignment with a regular view, then: A. Use a normal view. B. Use a secondary auxiliary. C. Use a section view instead. D. A viewing plane line can be used.

D. A viewing plane line can be used.

Of the following lines, which is not drawn thick? A. visible lines, B. short break lines, C. chain line, D. long break line.?

D. Long Break Line

Which of the following is the best method to create a hole? A. Twist drill B. Mill cutter bit C. Laser D. None of the above can be specified as the best method without additional information.

D. None of the above can be specified as the best method without additional information.

Refer to the ASME drawing types listed in the unit. Which one of the following is NOT an ASME drawing type? A. Tube bending B. Contour definition C. Matched set D. Skeleton

D. Skeleton

Of the following select the one statement that is NOT a meaning a line in a multiview drawing can have: A. Edge of a flat surface B. Maximum contour element of a curved surface C. Intersection edge where two surfaces meet, nothing more. D. Tangency element between a curved surface and a flat surface.

D. Tangency element between a curved surface and a flat surface.

This symbol is a downward arrow with a horizontal line perpendicular to the top of the arrow

Deep or Depth

The drawing title should be written with the ________ _________ last, even though it is read first.

Descriptive Modifiers

A(n) __________________ assembly is one that contains all dimensions for all features of the individual parts within the same drawing as the assembly of the individual parts.

Detail

What are the two basic categories of working drawings?

Detail drawings Assembly drawings

This symbol is a circle with a diagonal line going through it

Diameter

What term is given to the true angle between two surfaces?

Dihedral

What symbol can replace an arrowhead to indicate which surface should be the reference plane for measurements. Describe the symbol.

Dimensional Origin. It has a horizontal line through a circle with a vertical line perpendicular to the center of the line through the circle.

What name might be given to a documented and approved temporary change to a standard part?

Drawing Deviation

Of the following boxes in the title block, which is usually the largest? A. Drawing Number B. Scale C. Sheet Size D. CAGE Code

Drawing Number

True or False? While multiview drawings are often arranged in a certain manner, it does not matter how they are arranged on the paper as long as they are correctly labeled.

False

True or False? When a flat surface transitions into a cylindrical surface, a line is shown at the element of tangency?

False

True or False? A drawing wherein the views are created half size should be indicated as a scale of 2:1 (or 2=1) in the title block?

False

True or False? A spotface is simply a counterbore with a locked in depth of 0.125"

False

True or False? All companies refer to their drawing revisions a engineering change orders (ECO).

False

True or False? Although section lines may be drawn in different patterns for different materials, they should always slope up to the right at 45 degrees.

False

True or False? Cylinders are dimensioned by a leader line pointing to the circle view and a linear dimension that shows the length or height.

False

True or False? If a hole is to be reamed, the word REAM must appear on the drawing preceding the diameter of the reamer.

False

True or False? If drawn by hand, the short break line should be drawn with a straight edge.

False

True or False? Lettering on an Engineering drawing has serifs and is very fancy.

False

True or False? The CAGE Code is likely to be found in a basic parts list?

False

True or False? The company name and address are not placed in the title block for security reasons.

False

True or False? The first release of a drawing should always be identified as revision A.

False

True or False? The maximum material condition of a feature or part is another way of saying the "upper limit" or the "largest size"

False

True or False? The preferred method of dimensioning a keyway is with a local note.

False

True or False? The section derived by slicing a cone with a plane will be either elliptical or circular.

False

True or False? To save time and space, standard fits such as RC,LC and FN are often found in the local notes of a print?

False

True or False? While subassemblies are common for more complex machines and devices, these assembly drawings usually do not have their own drawing or part number.

False

True or False? All views projected from the front view feature the width dimension, so auxiliary views projected from the front view are sometimes referred to as width auxiliary views.

False.

True or False? Dimensioning is the easiest part of creating an industrial print?

False.

True or False? If a section view has a large area of section lining, the section lines can just be drawn around the edges, which is known as an edge section.

False.

List two specific items within a section view of assembled multiple choice objects that, centered on the cutting plane, will be left WHOLE in the section view.

Fasteners and Uncut Shafts.

Interior rounded corners are called __________?

Fillets

Balloons most often contain a __________number associated with the parts list.

Find or Mark

A technical document explaining auxiliary views might feature a drawing that shows the ______ line between an auxiliary plane and a frontal plane. The appearance of this reference line is the same as a phantom line.

Folding

What are the six normal views of an object?

Front, top, right side, left side, rear, and bottom.

List the names given to the three principle planes of projection.

Frontal, Horizontal, and Profile

What are the two classifications for notes?

General or Local

To indicate a dimensional value was changed on an original drawing, even though the actual geometry of the view was not changed, a(n) _____________should be placed under the dimension value to indicate the view is out of scale.

Heavy line.

List the three predominate terms used to define the three dimensions of an object.

Height, Width, and Depth.

The screw thread is defined as a ridge that has the shape of a ____________.

Helix

What standards organization impacts ASME standards for metric application?

ISO

What term describes the assurance that when you select one of part A from a storage bin containing hundreds of those parts and likewise a mating part B from a separate storage bin the two parts will fit together perfectly?

Interchangeable Manufacturing

ISO

International Organization for Standards

Each side of a gear tooth is based on the geometric form known as a_____________.

Involute

What is the difference between a keyseat and a keyway?

Keyseat: slot in the shaft where the key rests Keyway: groove in the hub where the key slides

A ___________ line is used to point to a feature or drawing area and usually has an arrowhead on only one end.

Leader

This term applies to the method of showing both the upper and lower value of a dimension.

Limit dimensioning

The term for the total variation in two parts that fit together is____________.

Limits of clearance

If a surface is perpendicular to a plane of projection, it projects on to that plane as a _________

Line

What type of note uses a leader line?

Local

If a cylindrical object has a countersunk hole on each end that is not very deep and not dimensioned in size, but rather simply noted and identified as datum surfaces, they are ________________.

Machining Centers

The ________size of a feature or object may or may not be the actual size.

Nominal

Flat surfaces are defined by how they are oriented to the three principal planes of projection. List the three names given to flat surfaces.

Normal, Inclined, and Oblique.

Multiview drawings are created using the principles of _____________ projection.

Orthographic

Parallel or Perpendicular? Orientation of the top surface of a table to the floor.

Parallel

Parallel or Perpendicular? Orientation of a flagpole to the ground.

Perpendicular

Parallel or Perpendicular? Orientation of the top surface of a cube to the front surface.

Perpendicular

When a drafter projects an auxiliary view from a normal view in such a way as to show the true size and shape of the inclined surface, the projection lines are ____________ to the inclined surface.

Perpendicular

The _______ line is used to show an alternate position, adjacent related parts, or repeated detail.

Phantom

What name is often applied to a large, roll feed output device for a CAD system?

Plotter

What does PDF stand for?

Portable Document Format

What term is applied to an auxiliary view projected directly from a normal view?

Primary Auxiliary View

Any view of an object can be scientifically explained as the projection of a object's features to a _________________________

Projection Plane

This symbol is a capital "R"

Radius

Which type of section view appears like an overlay directly on the regular view?

Revolved Section

Exterior rounded corners are called __________?

Rounds

To have a view that features the true size and shape of an oblique surface, a(n) _______________ auxiliary view must be projected from the primary auxiliary view.

Secondary.

What two lines from the alphabet of lines are used exclusively in section view drawings?

Section lines and Cutting Plane Lines

There are _______ normal ways to view an object?

Six

Define dimensioning in two words.

Size Description

All dimensions can be grouped into two categories. __________and ___________.

Size and location

List two specific features within a single object that, although cut by a cutting plane, will NOT be sectioned lined, shaded, or hatched in the section view.

Spokes and Arms on a wheel

This symbol is a square box

Square

Briefly explain why prints are sometimes called blueprints.

The resulting print which had a blue background and white lines.

How many options are there for the style of cutting plane lines?

Three

When reading a print, what part of the drawing should be read first?

Title Block

True or False? In orthographic projection, the projectors are parallel to each other.

True

True or False? The word chord describes a line segment that is less than the diameter of a circle.

True

True or False? A company may elect to include other columns to a revision history block, such as additional authority columns or additional date columns for when the change became effective.

True

True or False? A dimension that specifies 1.500" plus or minus .005" has a tolerance of .010

True

True or False? A machining drawing and a casting drawing can be combined in one.

True

True or False? An exploded assembly simply means several or all of the parts of an assembly are shown separated from each other , yet still inline.

True

True or False? Another name for a flat pattern drawing is a development.

True

True or False? Broaching is a process that cuts metal away by force.

True

True or False? If a counterbore transitions into a smaller hole with a 120 degree tapered conical surface, it might be referred to as a counterdrill.

True

True or False? It is permissible for extension lines to cross each other but, if possible, dimension lines should not cross each other.

True

True or False? Local notes can also be referred to as callouts?

True

True or False? Metric fits have an alphanumeric code that expresses the tolerance classes and these may be indicated on a print.

True

True or False? Most detail drawings are monodetail - one multiview drawing of one part on one sheet.

True

True or False? Prints are often an important part of a contractual agreement?

True

True or False? Reference dimensions should be indicated by placing numeric value in parenthesis.

True

True or False? Scientifically, every view created by the drafter or designer is based on a projection?

True

True or False? There are only two standard weight lines (widths) found in the alphabet of lines indicated in current standards?

True

True or False? Tolerance is the total amount by which a dimension can vary?

True

True or False? A flat surface is oriented to a plane of projection in one of three ways; perpendicular, parallel, or inclined.

True.

True or False? There is an unlimited number of possible directions for an auxiliary view, depending on the angle of features within an object.

True.

In which corner of the drawing should you expect to find the revision history block?

Upper Right Hand Corner

List two sheet materials that have been primary media for original drawings.

Vellum and Plastic Film

The two principle elements of print reading are ________and_________.

Visualization and Interpretation.

Are there any conditions under which a multidetail drawing could be created?

Yes. In a situation where two or more parts are integral to each other and it is deemed important to show both parts on one sheet.

List three items likely to be found in the revision history block.

Zone, alphanumeric character applied to change, itemized description of change.

If the dimension line is an arc, that is an indication the dimension is a _____________ dimension.

angular

All of the following terms are two dimensional except: a. polygon, b. circle, c. pyramid, d. rhombus

c. pyramid

List two different lines that feature a repeating pattern of a short dash followed by a long dash.

center line, chain line

The "across the flats" measurement of the hexagon is the same diameter of the circle that is the basis for the hexagon.

circumscribed

A cylindrical enlargement on one end of a hole is called a(n) _______________

counterbore

Which of the following lines do not feature any dashes? A. general purpose section lines, B. hidden lines, C. phantom lines, D. center lines

general purpose section lines

With respect to CAD systems, three dimensional objects that can be used as basic building blocks are called?

primitives

What name is given to a free form curve that smoothly fits through points based on a mathematical formula?

spline

The numbers and letters found in margins of larger drawings are related to __________

zones