7.5 Drawings

Question 1

Are engineering drawings drawn to size?

Answer 1

No

Question 2

What type of paper are usually used for engineering drawings?

Answer 2

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

Question 3

What is a pictorial view also known as?

Answer 3

Isometric

Question 4

What is an isometric view?

Answer 4

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

Question 5

When are break lines used in drawings?

Answer 5

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

Question 6

How are drilled holes portrayed in a drawing?

Answer 6

A thick lined circle

Question 7

How are reamed holes presented in a drawing?

Answer 7

They will include an explanatory note differentiating them from plain holes

Question 8

How are threaded holes defined in a drawing?

Answer 8

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

Question 9

How is surface texture described in drawings?

Answer 9

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

Question 10

What standard lays down the conventions for engineering drawing?

Answer 10

decreed by ispec 2200 of the air transport association of America

Question 11

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

Answer 11

Auxiliary view

Question 12

What does a British standard (BS8888) lay down

Answer 12

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

Question 13

What must be given in a drawing

Answer 13

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

Question 14

What system do engineering drawings follow

Answer 14

iSpec 2 200

Question 15

What does the title block provide

Answer 15

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

Question 16

What is a zone

Answer 16

A combination of vertical and horizontal coordinates

Question 17

What is a revision and what number system does it follow

Answer 17

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

Question 18

On a drawing where is the revision block placed

Answer 18

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

Question 19

What is the bill of materials and where is it

Answer 19

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

Question 20

What does a continuous thickness line mean ___________

Answer 20

Visible outlines and edges

Question 21

What does a continuously thin line mean

Answer 21

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

Question 22

What does a continuously thin wiggly (irregular) line mean

Answer 22

Limits of partial or interrupted views or sections

Question 23

What does a continuous thin straight line with zigzags mean

Answer 23

Limits of partial or interrupted views or sections

Question 24

What does a dashed thick line mean - - - -

Answer 24

Hidden outlines and edges

Question 25

What does a thin dashes straight line mean

Answer 25

Hidden outlines and edges

Question 26

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

Answer 26

Centre lines, lines of symmetry, pitch lines and circles

Question 27

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

Answer 27

Cutting planes

Question 28

What does chain thick mean

Answer 28

Lines or surfaces to which a special requirement applies

Question 29

Why do we use break lines

Answer 29

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

Question 30

How are drilled holes portrayed

Answer 30

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

Question 31

How do you show reamed holes

Answer 31

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

Question 32

How do you portray threaded holes

Answer 32

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

Question 33

What is it meant by the surface texture

Answer 33

A measure of the smoothness of the surface finish

Question 34

What does a smaller number mean in regards to surface texture

Answer 34

The smaller the number the smoother the surface is

Question 35

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

Answer 35

It is be stated as a number above the triangle

Question 36

What is a perspective drawing

Answer 36

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

Question 37

What is a sketch

Answer 37

A loosely structured hand drawing

Question 38

What is the principle of first angle projection

Answer 38

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

Question 39

What is the principle of third angle projection

Answer 39

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

Question 40

What is a sectional view

Answer 40

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

Question 41

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

Answer 41

45 degrees

Question 42

What does the auxiliary view show

Answer 42

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

Question 43

What is an unilateral tolerance

Answer 43

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

Question 44

What is the blueprint system used for

Answer 44

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

Question 45

What a detailed drawings or FAB

Answer 45

The detailing drawings of a single part

Question 46

What does an assembly drawing depict

Answer 46

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

Question 47

What does an installation drawing show

Answer 47

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

Question 48

What is an exploded- view drawing

Answer 48

Show every part that is in the assembly often IPL make use of these

Question 49

What does a schematic drawing show

Answer 49

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)

Question 50

What do electrical wiring diagrams illustrate

Answer 50

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

Question 51

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

Answer 51

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

Question 52

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

Answer 52

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

Question 53

What does CAD stand for

Answer 53

Computer aided design

Question 54

What did CAD do for the engineering world

Answer 54

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