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Blueprint > 1st Year > Flashcards

1st Year Flashcards

0
Q

What is a leader line

A

It is a line with an s or a dot or an arrow, it leads from an info box to a particular area

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1
Q

Orthographic projection is in 2 forms what are they.

A

3rd angle is primarily North America

1st angle primarily Europe

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2
Q

What is the text standard for drawings

A

Upper case gothic

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3
Q

What are the 3 basic dimensioning units

A

Metric
Imperial fraction
Imperial decimal

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4
Q

Dimensioning is broken into 3 groups with 1 being dual dimensional what are the other 2

A

Unidirectional (the preferred method)

Aligned

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5
Q

What are 3 pieces of info in a title block

A 
Title
Drawing #
Name of drafts person
Date of drawing 
Scale used
Tolerances
Material used
Company name
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6
Q

What is BC

A

Bolt circle

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7
Q

What is BHC

A

Bolt hole circle

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8
Q

What is BCD

A

Bolt circle diameter

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9
Q

What is CTRS

A

Centres

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10
Q

What is TYP

A

Typical

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11
Q

What is CBORE

A

Counterbore

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12
Q

What is CSK

A

Countersink

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13
Q

What is SFACE

A

Spot face

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14
Q

Threads can be drawn in 3 ways what are they

A

Schematic
Pictorial
Simplified

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15
Q

Which of the 3 drawing of a thread is most commonly used

A

Schematic

16
Q

With a thread designation what is the symbol for an external thread

A

A is external

B is an internal thread

17
Q

With a metric thread designation what is the symbol used for an internal thread

A

G

g is for an external thread

18
Q

Pictorial drawings give a 3D view and can be done in 1 of 3 ways what are they

A

Perspective: front not distorted, top & side taper off
Oblique: front not distorted but the other views are distorted not tapered off.
Isometric: best for trades, ( imagine a centre post and other views at 30*.

19
Q

What is NTS

A

Not to scale

20
Q

What are sectional views

A

Allows a cut away view of what you can’t see

21
Q

There are 7 sectional views can you name 3

A

Full: WP in half along the cutting plane.
Half: 1/4 view were you can see the inside and outside.
Revolved: like cutting and pulling out a piece and rotate 90*.
Offset: will show multiple details if they are not centred.
Aligned: like offset but appears on 1 line.
Broken out: used to see a small section, like snapping off a corner.

22
Q

When a drawing is scaled the left number refers to the drawing and the right number refers to the object, so would would 4:1 indicate

A

The drawing is larger than the actual object.

23
Q

What is Tolerance.

A

It is the total maximum permissible deviation of a part size

24
Q

What is basic size

A

This is the size before any tolerance or variation is applied

25
Q

What is a unilateral tolerance

A

It is either + or - not both

26
Q

What is a bilateral tolerance

A

It has a + and - number

27
Q

What is an equal bilateral tolerance

A

This is a bilateral tolerance with both numbers the same

28
Q

What is limits of size

A

This is another form of dimensioning, it is shown with 2 numbers an upper and a lower limit 0.090
0.080

29
Q

What is an allowance

A

This is the intentional difference between mating parts at MMC

30
Q

What is MMC

A

Maximum material condition

This is maximum material allowable left on the parts

31
Q

What are the 3 types of fit

A

Clearance
Interference
Transition

32
Q

What is a clearance fit

A

The shaft will always fit into the mating hole, even at MMC

33
Q

What is an interference fit

A

The shaft will always be larger than the bore, AKAN press fit

34
Q

What is a transition fit

A

There may be clearance or interference

35
Q

what is the symbol for a surface finish

A

A check mark

36
Q

If the surface finish symbol has a number what is the measurement in

A

Micro or millionths of an inch

37
Q

If the surface finish symbol has a 0 in the middle what does it indicate

A

No material removal

Blueprint (2 decks)

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