Engineering Graphics Midterm

What are the A,B,C,D,E standard sheet size measurements: 

A 8.5x11 inch 

B 11x17inch  

C 17x22 inch 

D 22x34 inch 

The primary metric unit used in engineering drawings is the 

SI unit

The primary U.S. customary unit used in engineering drawings is the: 

US customary units 

Most hand-drawn lettering is done at a height of: 

3mm or 1/8 inch high  

Sheet scale for object 2x larger than actual size: 

2:1

When lettering text, space the letters so that the space between the letters is always equal. True or False 

TRUE  

How many views must be drawn for each part drawing? 

As many as needed  

What is an oblique surface and how many projection planes is it perpendicular to

None 

What is an inclined surface and how many projection planes is it perpendicular to:

1; principal projection planes 

What is the order of line preferences: 

1. Visible lines 

2. Hidden lines  

3. Cutting lines 

4. Centerlines  

5. Phantom lines  

What is the difference between and thick and thin line: 

1. Thick lines: Used to represent the most important features in a drawing, such as visible edges or boundaries of objects. 

2. Thin: Less important details (centerlines)  

What is the standard thickness of a thick line: 

0.6 mm  

What is the standard thickness of a thin line: 

0.25 mm  

Phantom Line

thin line of alternating long and short dashes  

Cutting-plane

section or plane where material is to be removed

Short-break

Thick freehand or freely drawn using CAD

Centerlines

Dark and thin lines

dimesntion line

Thin line with arrowheads at each end that indicates size

Symmetry line

Thin horizontal line parallel with vertical lines  

hidden line

dark and thin dashes

section line

thin line (used for ‘shading’)

Sans serif means: 

Lettering with no serifs (simple and minimalistic)  

All word lettering in a drawing should start with a capital letter followed by lowercase letters.  True or False 

false

Which line types should be drawn thick: 

Visible lines, cutting plane lines, and short-break lines 

Which line types should be drawn thin: 

dimension lines, extension lines, centerlines, hidden lines, phantom lines, and leader lines

Three purposes of technical drawings are: 

1. Visualization  

2. Communication  

3. Documentation

Know what 1^st angle and 3^rd angle projection are and what we use here in the U.S.: 

1. 3^rd angle: The views are produced as is the observer is outside lookig in (US uses this one)  

2. 1^st angle: The observer looks the object to the planes of projection  

Know all uses of centerlines: 

1. Shows axis of symmetry for a feature or part 

2. Indicates a path of motion  

3. Shows the location for the bolt-hole circles and other circular pattern

Axis

Imaginary line that runs through the center of a thread screw

Pitch

The distance between the same points on adjacent threads of a screw

root

Bottom of the groove between two sides of a thread 

Crest

highest point on a thread

side

also called flank

Minor Diameter:

smallest diameter of the thread

Major diameter

largest diameter of the thread

Pitch diameter

diameter of an imaginary cylinder that passes through the thread profile

Depth

Distance between the base and the crest of the thread, measured perpendicular to the axis

Which line type may be used to show a repetition of a series of identical features? 

Phantom lines

What is a common intersection of three or more surfaces: 

vertices 

What is a common intersection of two surfaces: 

Edge 

Whenever possible, what type of line should extension lines dimension to: 

1. Visible lines 

2. Centerlines in some cases to showcase diameters 

The right-side view shows which dimensions: 

Depth and height 

The top view shows which dimensions: 

Depths and width  

The front view shows which dimensions: 

Height and width  

What is the minimum distance between the part and the first dimension? 

1.5 mm

Crossing dimension lines is acceptable?

YES

The three basic applications of screw threads are:  

1. To hold parts together  

2. To provide for adjustment between parts 

3. To transmit power 

What is the symbol for reference

( )

What is the symbol for countersink

What is the symbol for counterbore

What is the symbol for depth

What is the symbol for spot face

Know all parts of a thread call out in a drawing both inch and metric: 

1. Threads per inch: 13 TPI/ 1.5 mm 

2. Thread series: UNC,UNF,UNEF/ No series needed 

3. Tolerance class: 2A, 3B/ 6H 6g 

4. Pitch: 0.06 inch/ 1.5 mm 

5. Major diameter: 0.5 inches/ 10 mm 

Know proper dimensioning: 

1. Use logical placement  

2. Make is legible and easy to read  

Know what are possible types of information that can be found in the title block: 

Title, scale, date, author, approval blocks 

What are the stages of the design process: 

1. Problem identification  

2. Ideation  

3. Refinement/analysis 

4. Implementation/ documentation