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3E551 Engineering Apprentice, VOL.2 [Edit Code 01]
Review flashcards from the second volume of CDC's for airmen with the 3E531 AFSC
234
Engineering
Not Applicable
01/26/2012

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Cards

Term
What two things does the arrangement of your work area effect?
Definition
It can improve your comfort and work.
Term
What adjustment can be made to make your line of sight perpendicular to the drawing surface?
Definition
Height of chair.
Term
What type of light is easiest on your eyes?
Definition
Natural north light.
Term
What is the purpose of placing heavy manilla paper on a polyvinyl cover on the drawing surface?
Definition
Prevents indentations from being made in the drawing board.
Term
What determines the type of drawing media you use for a particular drawing?
Definition
The character, purpose, and use of a drawing.
Term
What are the two basic standards on which all drawing sizes are based?
Definition
The 8.5x11 and 9x12.
Term
On what type of drafting media is plastic lead used?
Definition
Polyester drafting film.
Term
What individual difference has an effect on the lead hardness you use to get the desired proper line weight?
Definition
Pressure used by the individual on the pencil.
Term
What should the shape of the point of a drafting lead holder or pencil look like?
Definition
Tapered conical point.
Term
List the basic pieces of drafting equipment?
Definition
Drawing board, t-square, triangles, scales, pencils, ink, protractor, erasers, irregular curves.
Term
To be of value to construction forces, name the three criteria that drawings must meet.
Definition
Accuracy, legibility, neatness.
Term
Although you must attain the criteria you listed in question 2, what other criteria should you satisfy when completing a drawing?
Definition
Complete the drawing with reasonable accuracy in the shortest time possible.
Term
What is considered to be a waste of time when you prepare a drawing?
Definition
Higher accuracy than required.
Term
When is a drawing useless to the workers who use it?
Definition
When it is not accurate enough for the purpose.
Term
Name two ways to prevent the T-square from warping.
Definition
Lay it flat, and suspend it from a hole in the blade.
Term
What other drafting equipment serves the same function as the T-square?
Definition
Parallel bar and drafting machine.
Term
What are the two most common types of scales used?
Definition
Engineer's scales and architect's scales.
Term
What is the advantage of the center bow instruments over the side bow instruments?
Definition
Center bow instruments hold their setting.
Term
What devices are used to draw arcs and circles if the compass is not used?
Definition
Drafting templates.
Term
What is the prime advantage of using templates?
Definition
The rapid and consistent duplication of detail.
Term
When you are inking, what can you do to templates and triangles to prevent bleeding?
Definition
Place bits of tape on the bottom.
Term
Each new position of the irregular curve should fit how many plotted points on the drawing?
Definition
Three or more.
Term
What is the purpose of lettering on a drawing?
Definition
To convey information.
Term
What value is fancy lettering that cannot be interpreted by the user?
Definition
None.
Term
List four requirements for freehand lettering.
Definition
Legible, similarity, darkness, uniformity.
Term
Define "geometric construction."
Definition
A method of constructing a figure with the aid of a pencil, straightedge, and compass only.
Term
One and only circle can be drawn through these.
Definition
Three points not on a line.
Term
On these, all sides are equal and all angles are equal.
Definition
Regular polygon.
Term
The major and minor axes divide this figure into four equal segments.
Definition
Bisector.
Term
Measure along this to find the distance between a point and a line.
Definition
Perpendicular.
Term
These lines are equidistant from each other at all points.
Definition
Parallel.
Term
On a parallelogram, these bisect each other.
Definition
Diagonals.
Term
Only one of these can be drawn from a given point on a given line.
Definition
Perpendicular.
Term
You may intersect a line with these to cut the line into equal segments.
Definition
Equally spaced parallel lines.
Term
If two circles are tangent to each other, a straight line joining their centers passes through this.
Definition
Point of tangency.
Term
You may move any figure from one place to another without altering this.
Definition
Size or shape.
Term
Curves are tangent to these at only one point.
Definition
Straight lines or curves.
Term
A change in which two weather conditions affects the accuracy of geometrical constructions on large drawings?
Definition
Temperature or humidity.
Term
What is the greatest enemy of the accuracy of geometric construction?
Definition
Carelessness.
Term
What type of lighting is best for a left-handed draftsman?
Definition
Natural north light from the upper right.
Term
What purpose does the polyvinyl or heavy manila paper covering a drawing board surface serve?
Definition
Prevents indentations from being made into the soft board.
Term
Why is polyester film most desirable for record drawings?
Definition
Film does not deteriorate or yellow with age.
Term
Which standard for drawing sheet sizes is commonly used in the AF?
Definition
Engineering standard based on 8.5x11 sheets.
Term
What type of drafting pencil requires no pointing of the lead?
Definition
Mechanical thin-lead pencils.
Term
The ultimate goal in engineering drawing is to do what?
Definition
Produce precise lines and curves with a reasonable degree of accuracy and time.
Term
When you prepare a drawing to a higher degree of accuracy than what was required you are doing what?
Definition
Wasting time.
Term
Which straightedge is most preferred by draftsmen?
Definition
Parallel bar.
Term
Triangles can be used to form any angle with a multiple of what degree?
Definition
15 degrees.
Term
Which scale subdivides inches decimally?
Definition
Engineer's scale.
Term
With the exception of circle centerlines, which of the following is the correct order in which to ink lines?
Definition
Circles, irregular curves, horizontal lines, and vertical lines.
Term
What is the first requirement of freehand lettering?
Definition
Lettering must be legible.
Term
Three points are drawn such that they are not in a straight line. How many circles can be drawn through these points?
Definition
One.
Term
What are line conventions?
Definition
Symbols that furnish a means of representing or describing some basic aspect of a real object.
Term
What type line is used to define the end limits of the surface to which the measurement on that dimension line applies?
Definition
Extension line.
Term
If you reduce the width of an arrowhead because of narrow space, what must you do to the length of the arrowhead?
Definition
Reduce the length so that it is three times the width.
Term
To help in reading a drawing, how should you place dimensional notes on a drawing?
Definition
So that they read from the bottom of the drawing.
Term
If a dimension is in even feet, what else must you add to the notation?
Definition
A dash and a zero.
Term
Define "tolerance."
Definition
Tolerance is a permissible amount of variation from a specified dimension.
Term
What is the tolerance of a part with a basic dimension of 2.5 inches and limits of +/- 1/8th inch?
Definition
1/4th inch.
Term
What type of dimensioning system is best to specify the location of several holes on a common arc?
Definition
Angular method.
Term
When you dimension cylinders, what is the best way to show the diameter?
Definition
On the view in which the circular base plane shows an edge.
Term
Define a "location dimension."
Definition
One that specifies the position or distance relationship of one feature of an object with respect to another.
Term
When dimensioning views, which view should show as many dimensions as practicable?
Definition
Principal view.
Term
What is the result of grouping dimensions?
Definition
Clarity is improved.
Term
What is used in order to place dimensions outside a view?
Definition
Extension lines.
Term
For other than the 45 degrees bevel, how do you dimension chamfers?
Definition
By giving the length and angle.
Term
How do you indicate a spot-face?
Definition
With a leader from a note carrying the abbreviation SF and giving the diameter of the spot face.
Term
List the four requirements for drawing notes.
Definition
Brevity, wording so that they can be interpreted in only one way, lettered horizontally, conform to the lettering requirements.
Term
Why are dimensional notes used?
Definition
Because they eliminate extra numerical dimensions.
Term
What type of notes can be presented in tabular form?
Definition
General notes.
Term
Where is the code mark on a window schedule indicated?
Definition
It is placed next to the window symbol that applies on the plan view.
Term
What is the most important reason for reviewing your drawings upon completion?
Definition
Prevents overrun on contract costs.
Term
What is meant by "the basics of technique" used when you review a set of drawings?
Definition
Accuracy, legibility, and neatness.
Term
What reproduction process is usually referred to as a Xerox reproduction?
Definition
The electrostatic process.
Term
What are the advantages of the Xerox process of reproduction?
Definition
Easy enlargement and reduction, small storage size, quick retrieval, fast duplication, reduced shipping costs.
Term
What is the major disadvantage of the Xerox process?
Definition
A potential for distortion by projection through a lens.
Term
Why is the diazo-type reproduction so popular?
Definition
Diazo reproduction is popular because of its many applications, ease, and speed of operation.
Term
When it is fed into the ozalid machine, what is the position of the drawing in relation to the sensitized paper and the mercury vapor lamp?
Definition
It is between them.
Term
What takes place in the developer section of the diazo reproduction machine?
Definition
The part of the sensitized paper which was protected from the light source is exposed to ammonia vapors and becomes a dark line.
Term
What causes fuzzy figures and lines to appear in a diazo reproduction?
Definition
If the lines and details on the drawing are not dense enough, light penetrates them and causes fuzzy figures and lines on the reproduction.
Term
The sensitized materials in diazo processes can generally be classified in what two categories?
Definition
Reproducible and nonreproducible.
Term
If the reproduction is subject to soiling, what type of print paper is desirable?
Definition
Redline paper.
Term
When reproducing intermediate masters, why should the positive be placed face down on the sensitized material?
Definition
Because the lines of print are much sharper and any corrections are easier to make and are more satisfactory.
Term
Describe an ideal storage facility for sensitized materials?
Definition
An air-conditioned room where temperature is maintained between 60 and 70 degrees and the humidity is relatively low.
Term
What causes condensation to form inside a sensitized material wrapper?
Definition
If the sensitized material is moved from a low to high temperature quickly, condensation forms inside the wrapper.
Term
What is the function of the stand section of the ozalid machine?
Definition
The stand section furnishes a working table from which to feed the machine.
Term
What causes the image to appear on the reproduction?
Definition
The reaction of ammonia vapors to the printed sensitized materials.
Term
If while you are using the ozalid machine a vapor lock occurs, what can you do to correct the situation?
Definition
Dilute the ammonia with cold water. One quart of water per gallon of 26% ammona solution.
Term
Why should the waste ammonia drain bottle be emptied daily?
Definition
To prevent ammonia fumes from seeping into the surrounding areas.
Term
How can you tell when the printer is ready for use?
Definition
The printer is ready for use when the developer tank reaches 250 degrees.
Term
What areas on the reproduction will retain the sensitized material after going through the printer section?
Definition
The areas that are protected from the light by the darker lines on the positive.
Term
What role does the mercury vapor lamp play in the diazo reproduction process?
Definition
It exposes the sensitized paper to light except where the pencil or ink lines appear?
Term
What distance is suitable for use between parallel dimension lines?
Definition
3/8th.
Term
It is permissible for extension lines to cross over what lines?
Definition
outline lines and each other.
Term
The two fundamental dimensioning systems are what?
Definition
Rectangular dimensioning and angular dimensioning.
Term
Noncircular curves can be dimensioned by giving the what?
Definition
Dimensions of a series of offset points.
Term
1/4th by 45 degrees applies to what?
Definition
Chamfer dimension.
Term
General notes have specific characteristics. Which of these are a characteristic of a general note?
Definition
Usually grouped together in the lower right corner of the drawing sheet.
Term
What does the mark "3-A" represent in a door schedule?
Definition
Type "A" doors on the third floor.
Term
When possible, what rule should be followed regarding arrangement/placement of details on a drawing or in a set of drawings?
Definition
Place details on the same drawing sheet that contains the view to which they pertain.
Term
Which is the correct sequence for a set of drawings?
Definition
Plot plan, foundation/floor plan, elevations, HVAC/plumbing, and electrical plan.
Term
The primary reason to review finished drawings is to what?
Definition
Prevent costly contract overruns.
Term
When reviewing your project drawings, what basics should you keep in mind?
Definition
Accuracy, legibility, and neatness.
Term
How is the image fused to the paper in the electrostatic reproduction process?
Definition
Exposure to heat and light while the drum turns with the positively charged paper.
Term
What is the primary disadvantage of electrostatic reproduction?
Definition
Possible distortion of the drawing.
Term
Diazo reproduction requires all except what?
Definition
High voltages.
Term
In the ozalid process, reproductions are made by exposing sensitized materials to what?
Definition
Light and then ammonia vapors.
Term
In the ozalid process, why is it critical to have all lines and details as dark as possible?
Definition
To prevent the light from penetrating through the line to the sensitized paper.
Term
What are the characteristics of sensitized mylar products?
Definition
Tough, durable, and permanency.
Term
Sensitized materials that are opened in areas of high humidity
Definition
Absorb moisture.
Term
The major sections of the ozalid machine are what?
Definition
Printer, developer, and stand.
Term
What CADD function overlays the display screen with a grid pattern of any desired size?
Definition
Grid.
Term
What CADD function lets you magnify or reduce the view of the object drawn or any of its part?
Definition
Zoom.
Term
What CADD function allows multiple copies of your figure to be spaced evenly across the drawing sheet in rows and columns or other shapes?
Definition
Array.
Term
What toolbar sets object properties such as color, line type, and line weight and manages layers?
Definition
Object properties toolbar.
Term
When using the function key in AutoCAD what does the F4 function key do?
Definition
On/off tablet mode.
Term
All relative coordinates MUST begin with what symbol before you input X and Y vlaues?
Definition
The @ symbol.
Term
Explain what the redraw command is used for.
Definition
Refreshes graphic display area.
Term
What command allows you to change the layer that the element is currently on to a layer that has already been created?
Definition
Layer command.
Term
What do you call the values you set to define the drawing limits of your drawing area?
Definition
Drawing limits.
Term
What command saves changes you make in the Plot dialog box in the layout and is unavailable if multiple layouts are selected?
Definition
Save changes to layout command.
Term
What command displays the currently configured plotting device, the port to which it's connected or its network location, and any additional user-defined comments about the plotter?
Definition
Plotter configuration command.
Term
What CADD function allows the operator to make an exact copy of an element in evenly spaced rows and columns on the drawing sheet?
Definition
Array.
Term
What CADD function produces round corners at any intersection of two lines?
Definition
Fillet.
Term
What CADD function moves the point of view any where on the drafting screen?
Definition
Pan.
Term
What does F9 do in CADD?
Definition
Toggles on/off snap mode.
Term
The system default settings for AutoCAD saves your file every how many minutes?
Definition
120 minutes.
Term
What command snaps to the closet endpoint of objects such as lines, polylines, arcs, and curves?
Definition
Endpoint snap.
Term
What is the biggest advantage of using dialog boxes?
Definition
They help speed up the learning process for beginners.
Term
Which editing command allows you to change the lineweight of the elements you selected?
Definition
Lineweight.
Term
What tab from the plot dialog box specifies paper size, orientation, plot are and scale, offset, and other options?
Definition
Plot settings tab.
Term
What are the benefits of using a CADD system?
Definition
Modifications, speed, communications, and quality.
Term
What working drawings show overall relationships?
Definition
Plans and elevations.
Term
What is the purpose of detail views?
Definition
Detail views furnish information not provided on general views.
Term
What type drawing shows the starting point in actual construction?
Definition
Foundation plan, which must be a completely dimensioned drawing.
Term
How can you obtain the cross-sectional view of a building that provides a floor plan?
Definition
By visualizing that a horizontal cutting plane passes through a building in such a way that it cuts through all walls, doors, and windows.
Term
When should horizontal dimensions be shown on an elevation view?
Definition
When it is not possible to show them to better advantage on plan view.
Term
How is rendering used on architectural drawings?
Definition
To depict a structure and bring out its form and shape.
Term
How is a longitudinal section obtained?
Definition
By taking a section view lengthwise.
Term
What type of lettering style should you develop for architectural drawings?
Definition
One that is simple and easy to make.
Term
How can you show the relative importance of the parts of a drawing?
Definition
By varying the letter sizes on the drawing.
Term
What are the three items that you must consider when spacing dimension lines?
Definition
The scale, lettering height, available space.
Term
How should drawings be dimensioned to allow for variations in sizes of materials?
Definition
By giving center-to-center dimensions.
Term
What is the most important consideration when you select a scale for a drawing?
Definition
The clearness of the drawing.
Term
What should a graphic scale be used on a drawing?
Definition
If the drawing is to be reduced or enlarged.
Term
What determines the size of a symbol used for a window on an elevation view?
Definition
The scale of the view.
Term
What is the purpose of plan symbols?
Definition
To identify and locate the various parts of the building.
Term
Why should step-by-step procedures be used when drawing a plan?
Definition
To simplify or speed up the task.
Term
List the two reasons for using different line weights on plans?
Definition
Emphasizes the importance of parts, and makes plans easier to read.
Term
How do you determine how thick to draw walls?
Definition
By the type of construction materials used.
Term
Normally, what size studs are used in walls that have plumbing walls?
Definition
2x6.
Term
What should the outermost dimensions show on a plan view?
Definition
The overall dimension of the structure.
Term
What should a completed floor plan illustrate?
Definition
Every detail concerning the structure from a vertical standpoint.
Term
What lines may be accented on an elevation view?
Definition
Window, door, roof and building outline lines.
Term
Where should the front elevation view be located on a drawing sheet?
Definition
Lower left portion of the drawing sheet.
Term
When you draw an elevation view, why do you tape a plan view on the drawing sheet?
Definition
Because of the accuracy obtained from projected points to the elevation view.
Term
How were the heads of the windows situated in the example drawing of the elevation view?
Definition
They were lined up with the top of the door.
Term
On an elevation view, where the wall area is large, how may the material be shown?
Definition
Show a small portion of the area with the appropriate symbol.
Term
What is the last thing you should do when you prepare an elevation drawing?
Definition
Check the drawing to make sure it is complete and accurate.
Term
Why are large-scale detail drawings included as a part of every set of plans?
Definition
To show clearly those parts of a structure that cannot be shown in the plan and elevation views.
Term
What methods are used to identify cutting plane lines?
Definition
Letters or numbers.
Term
Why must cutting plane lines be identified?
Definition
Without a proper reference and title, a detail has no meaning.
Term
What is the range of scales used for details?
Definition
One-half inch equals one foot up to actual size.
Term
Why isn't it necessary to provide the builder with complete information on installing plumbing systems?
Definition
The installation is governed by building codes, and the installation is inspected before being covered by subsequent construction.
Term
How is an overlay prepared?
Definition
It is traced from a floor plan.
Term
What must be accomplished if a pipe drawing contains more than one system?
Definition
A legend must be placed on the drawing to identify the different lines and symbols shown on the layout.
Term
What lines are used to indicate supply ducts?
Definition
Solid lines.
Term
Why are split-tee connections used in supply systems?
Definition
They direct the flow of air in supply lines.
Term
Why should air conditioning units be located in the center of a building?
Definition
In order to make main duct lengths about equal.
Term
Define "home runs" as applied to a wiring plan.
Definition
Home runs are the wires from the fixtures in a circuit to the panel box.
Term
Why is a beam referred to as a member?
Definition
Because it is a unit part of a larger structure.
Term
This structural member supports columns, pier, and masonry walls.
Definition
Footing.
Term
Since triangles cannot change shape without changing the length of one of its sides, they are used to form this structural member.
Definition
Truss.
Term
Used in steel, concrete or timber construction, these structural members support loads acting downward.
Definition
Column.
Term
A beam that spans a door or window opening and supports the structure directly over the opening.
Definition
Lintel.
Term
A beam that spans the distance between trusses, girders, or rafters and supports the roof covering.
Definition
Purlin.
Term
The space between purlins on a roof.
Definition
Panel.
Term
A heavy member used to support beams or joists.
Definition
Girder.
Term
The heaviest or strongest member of a floor system.
Definition
Girder.
Term
Why are metal connectors used in timber construction?
Definition
To make wood to wood joints stronger.
Term
Why are steel plates used in timber construction?
Definition
To connect and reinforce joints in framing.
Term
What is the function of floor framing plans?
Definition
They specify the size and location of columns, girders, beams, and joists.
Term
Define "near face."
Definition
It indicates the surface nearest the observer for that particular direction of site.
Term
What is one dimensioning method used with crowded conditions?
Definition
A note or dimension connected to the object by a leader.
Term
Why are two scales used for truss members?
Definition
To save space and time.
Term
Is it necessary to draw all bolts in place? Why?
Definition
No. The use of centerlines and notes may be used to designate the location of bolts, as long as they fully explain construction.
Term
Simplified, small-scale diagrams which show mark, location, and position of each member.
Definition
Erection drawings.
Term
This is called a shop detail drawing.
Definition
Fabrication drawings.
Term
Gives all information on size, shape, material, connections, and attachments for each member.
Definition
Fabrication drawings.
Term
Convey necessary information on the location of the structure in relation to the site.
Definition
Layout drawings.
Term
Listing of quantities, lengths, and necessary descriptions.
Definition
Bill of materials.
Term
Consists of plan views, elevations, and sections of the structure.
Definition
General drawings.
Term
Shows a method of constructing temporary supports.
Definition
Falsework plans.
Term
What are erection marks?
Definition
Marks used to identify a member's location within the structure.
Term
What are assembly marks?
Definition
Marks for shop use in assembling the members.
Term
If the construction is simple, where and by whom may the falsework be designed?
Definition
At the job site by the erector or contractor.
Term
Why is it necessary to show thickness for a bulb angle?
Definition
Because the thickness is standard for specific shapes.
Term
How are standard channels specified?
Definition
Depth by weight per foot by length.
Term
What is a "lally" column?
Definition
A pipe column filled with concrete.
Term
On longer spans, why are trusses used instead of built-up girders?
Definition
Because they have a greater strength, pound for pound.
Term
Define "clearance."
Definition
The space left between adjoining members to allow for errors in fabrication, changes in temperature, and to facilitate erection.
Term
List the two main types of beam connections.
Definition
Framed, and seated.
Term
How is the gaugeline of an angle located?
Definition
It is measured from the back of the angle.
Term
Where are the working lines established on non-rectangular members?
Definition
On the centerlines of the members.
Term
Define "arrow side."
Definition
The side of a join to which the arrow points.
Term
How is a groove weld, which is to be welded flush, indicated on a drawing?
Definition
By adding the flush contour symbol to the weld symbol.
Term
What is the function of general plans for concrete structures?
Definition
To show the arrangement of footings, columns, beams, and other pads.
Term
What is the first step in preparing a framing plan?
Definition
Establish the outside outlines of the floor, exterior wall thickness, and column centerlines.
Term
What note must be added to a plan view of stairs?
Definition
The direction and number of stair risers are indicated by using an arrow and the letter "R"
Term
Who is responsible for determining the size, amount, and placing of reinforcing?
Definition
A structural engineer.
Term
On general and detail drawings, the scale used depends on:
Definition
The size of the object.
Term
Rendering is most often used in producing:
Definition
Elevation views.
Term
When cutting planes cut across the narrow part of a building, the view is called a:
Definition
Transverse section.
Term
When freehand lettering, guidelines are:
Definition
Always used.
Term
Light weight lines on a floor plan are used to represent:
Definition
Windows, invisible lines, and centerlines.
Term
When the centerline of a doorway is not located, the builder must:
Definition
Center the door in the available wall space.
Term
When dimensioning on a floor plan to an exterior wall, give the dimension to the:
Definition
Outside face of the wall.
Term
In an elevation view, glass is indicated by:
Definition
Light diagonal lines.
Term
Concrete is symbolized on an elevation drawing:
Definition
With scattered dots.
Term
Detail drawings are usually found on:
Definition
Separate sheets that only contain detail drawings.
Term
In a frame building, the wooden strip on which vertical wall studs rest is the:
Definition
Sill.
Term
A dashed line on a HVAC plan represents:
Definition
Return air ducts.
Term
What structural member is supported by either a girder or a column?
Definition
Beam.
Term
The member consisting of a truss and the columns supporting it is a:
Definition
Bent.
Term
What structural member is made of straight members fastened together forming a triangle?
Definition
Truss.
Term
Why are steel rods used in constructing wood trusses?
Definition
Because it is difficult to fasten wood and fully utilize its tensile strength.
Term
Which plan specifies the size and location of columns, girders, and beams?
Definition
Floor framing plan.
Term
When drawing large complicated structures, keep the diagram symbols:
Definition
Simple.
Term
When a building is constructed, each part of the structure is listed on the bill of materials along with the part's:
Definition
Identification marks and weight.
Term
Why are trusses used for longer span construction?
Definition
Greater strength, pound for pound, than girders.
Term
How are columns located in rectangular steel framing?
Definition
By an alphanumeric coordinate system.
Term
A complete welding symbol consists of:
Definition
Eight elements.
Term
The use of bolsters and chairs in concrete construction is indicated in the:
Definition
Schedules.
Term
For column schedules to be easily interpreted, the:
Definition
Details and sections should clearly show the arrangement of reinforcing.
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