study guide Flashcards

1
Q

2 decimal places needed the second # preferred to be even

A

.04 / 2 = .02

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

2 Dual Dimensioning Techniques (be able to do examples of each)

A

Position Method mm/in.
Bracket Method in[mm]

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

2 Decimal Inches advantages over fractional dimensioning

A

More Accuracy
Easier to Calculate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Still used in two drafting fields

A

Architectural
Structural

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

2 ways to dimension
Be able to write down the notes (a.b.c.) of each way

A

Unidirectional
a. All dimensions and notes lettered horizontal
b. All text and dimensions are read from the bottom of the drawing.
c. Used in the mechanical industries because easier to read

Aligned.
a. All dimension figures aligned with the dimension line.
b. Vertical dimensions are read from right-side of sheet.
c. Try to avoid dimensioning in the “Gray Area”
* 45° left of vertical
* No dimension in this area if possible
* If not, dimension read from left of sheet

o Know what the gray area is (45 degrees left of vertical)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

2 ways to dimension angles

A

Angle and Linear Dimension
Coordinate Method

Which way is more accurate
Coordinate Method

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Definition of a Fillet

A

Interior Radius on a part

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Definition of a Round

A

Exterior Radius on a part _

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the standard size of fillets and rounds

A

1/8” , ¼”, 3mm, 6mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a finish mark used for

A

To indicate an Area that needs to be Machined or Finished

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Where is a finish mark located on the drawing

A

On any edge view of a finished surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a finish allowance?

A

The extra material that must be provided to be machined off.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the normal finish allowance thickness?

A

1/8”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a counterbored hole used for?

A

To provide a place to recess bolts and screws.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How is a counterbored hole dimensioned?

A

Note with leader pointing to outer circle - small diameter, then the counter-bore symbol
space counter-bore diameter, depth symbol then the counter-bore depth.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a countersunk hole used for?

A

For recessing flat head screws

17
Q

How is a countersunk hole dimensioned?

A

Note with leader pointing to outer circle - small diameter, then the counter-sink symbol
space counter-sink diameter space capital X space included angle of counter-sink.

18
Q

What is the standard depth of a spotface?

A

No real standard. They are usually made between 1/32 to 1/16 deep, just enough to
clean up the surface. We draw them at 1/16” deep.

19
Q

What is a spotfaced hole used for?

A

To provide a flat surface for a bolt or screw to rest.

20
Q

How a spotfaced hole dimensioned?

A

Same as Counter-Bore without the depth. Note with leader pointing to outer circle -
small diameter, then the counter-bore symbol space counter-bore diameter.