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Kemble > 7.5 Drawings > Flashcards

7.5 Drawings Flashcards

1
Q

Are engineering drawings drawn to size?

A

No

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2
Q

What type of paper are usually used for engineering drawings?

A

The A series (A4, A3, A2, A1, A0)

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3
Q

What is a pictorial view also known as?

A

Isometric

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4
Q

What is an isometric view?

A

A mathematical method of constructing a three dimensional object without using perspective. Makes drawings more realistic

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5
Q

When are break lines used in drawings?

A

When there is limited space on a piece of paper and to produce a more compact drawing

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6
Q

How are drilled holes portrayed in a drawing?

A

A thick lined circle

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7
Q

How are reamed holes presented in a drawing?

A

They will include an explanatory note differentiating them from plain holes

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8
Q

How are threaded holes defined in a drawing?

A

A thick circular line for the thread crest and a thin, broken line for the root

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9
Q

How is surface texture described in drawings?

A

Described through numbers, the smaller the number the smoother the finish

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10
Q

What standard lays down the conventions for engineering drawing?

A

decreed by ispec 2200 of the air transport association of America

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11
Q

What type of a view will show the a drawing and the angle of it truly?

A

Auxiliary view

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12
Q

What does a British standard (BS8888) lay down

A

Lays down the criteria and conventions which should be adhered to when creating an engineering drawing

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13
Q

What must be given in a drawing

A

Shape
Size/dimensions
Material specifications
Material finish
Relationship between the component and associated components in the assembly

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14
Q

What system do engineering drawings follow

A

iSpec 2 200

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15
Q

What does the title block provide

A

Every print must have identification. It’s provided by the title block

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16
Q

What is a zone

A

A combination of vertical and horizontal coordinates

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17
Q

What is a revision and what number system does it follow

A

It’s known as raising - in - issue and the drawing issue will raise by one digit (from issue 1 to issue 2)

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18
Q

On a drawing where is the revision block placed

A

It starts in the top right hand corner of each sheet and amendments are recorded on the left

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19
Q

What is the bill of materials and where is it

A

The list of all component parts on a drawing
above the title block

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20
Q

What does a continuous thickness line mean ___________

A

Visible outlines and edges

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21
Q

What does a continuously thin line mean

A

Imaginary lines of intersection, dimensions lines - basically just the imaginary lines

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22
Q

What does a continuously thin wiggly (irregular) line mean

A

Limits of partial or interrupted views or sections

23
Q

What does a continuous thin straight line with zigzags mean

A

Limits of partial or interrupted views or sections

24
Q

What does a dashed thick line mean - - - -

A

Hidden outlines and edges

25
Q

What does a thin dashes straight line mean

A

Hidden outlines and edges

26
Q

What does chain thin lines mean — - — - — -

A

Centre lines, lines of symmetry, pitch lines and circles

27
Q

What does chain thin, thick at the ends and changes direction mean

A

Cutting planes

28
Q

What does chain thick mean

A

Lines or surfaces to which a special requirement applies

29
Q

Why do we use break lines

A

Due to the limited space on a sheet, so therefore we can produce smaller drawings

30
Q

How are drilled holes portrayed

A

A thick lined circle
Diameter may be noted as well as depth if it is a blind hole

31
Q

How do you show reamed holes

A

The reamed hole symbol with have a note differencing them from plain holes

32
Q

How do you portray threaded holes

A

With a thick circular line for the thread crest and a thin broken line for the root

33
Q

What is it meant by the surface texture

A

A measure of the smoothness of the surface finish

34
Q

What does a smaller number mean in regards to surface texture

A

The smaller the number the smoother the surface is

35
Q

In a drawing how would a designated surface texture be told to you

A

It is be stated as a number above the triangle

36
Q

What is a perspective drawing

A

Shows a drawing in the way the human eye sees it - don’t accurately show dimensions

37
Q

What is a sketch

A

A loosely structured hand drawing

38
Q

What is the principle of first angle projection

A

Each view represents the side of the object remote from its adjacent view

39
Q

What is the principle of third angle projection

A

Each view represents the side of the object nearest to it in adjacent view

40
Q

What is a sectional view

A

Shows the object drawn as if it is removed so that the interior shape can be seen clearly

41
Q

At what degree are sectional drawings drawn to the axis of the section

A

45 degrees

42
Q

What does the auxiliary view show

A

The true shape of a surface is shown by auxiliary view drawn at right angles to the surface

43
Q

What is an unilateral tolerance

A

One which permits a variation in one direction only, either above or below its basic size

44
Q

What is the blueprint system used for

A

By the engineer to communicate his idea to various people who buy the raw material,plan manufacturing, build parts or buy the final part

45
Q

What a detailed drawings or FAB

A

The detailing drawings of a single part

46
Q

What does an assembly drawing depict

A

Show the relationship between two or more parts or a group of assemblies

47
Q

What does an installation drawing show

A

Designed to describe exactly where certain parts, fixture etc are permanently affixed

48
Q

What is an exploded- view drawing

A

Show every part that is in the assembly

often IPL make use of these

49
Q

What does a schematic drawing show

A

Doesn’t show the exact image of the part but shows the principle of the operation
Ideal for trouble shooting

(Shows where objects are located in relation to each other - which way fluid would flow)

50
Q

What do electrical wiring diagrams illustrate

A

Indicate size of wire, type of terminals - used to illustrate the principle

51
Q

What ratio were aircraft drawings drawn at and why was this inconvenient

A

1:1
Because it meant that the cabinets had to be large enough to store them

52
Q

What ways did people try and improve the storage of aircraft drawings

A

Aperture cards (Photographing them - mounted onto a card)
Microfilm
CD- ROMS
CDs
DVDs - preferred option

53
Q

What does CAD stand for

A

Computer aided design

54
Q

What did CAD do for the engineering world

A

It meant that everything could be designed electronically and could be stored on electronically too.

Kemble (39 decks)

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