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adv pe > Metal and plastics > Flashcards

Metal and plastics Flashcards

1
Q

What does the term MIG stand for?

A

Metal inert gas

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2
Q

Why are there holes in the drill stand

A

So you can clamp the work down while drilling

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3
Q

The size of the drill press is determined by what measurement

A

From the edge of the column to the centre of the spindle

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4
Q

What does a Lathe do and how does it work

A

A lathe is a machining tool that is used primarily for shaping metal or wood. It works by rotating the workpiece around a stationary cutting tool.

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5
Q

MIG welding is a semi automatic arc welding process in which an electric arc is struck between…………….

A

electrodes of the metal immersed in the dispersion medium.

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6
Q

describe the type and purpose of electrodes used in MIG welding

A

The purpose is to create an electric arc and the type is AC or DC

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7
Q

smallest measurement in engineers rule

A

Half a mm

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8
Q

what is a pan brake

A

Is a tool used to bend sheet metal

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9
Q

what is a centre punch

A

a hand punch consisting of a short steel bar with a hardened conical point at one end used for marking the centers of holes to be drilled.

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10
Q

define ergonomics

A

the study of people’s efficiency in their working environment.

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11
Q

what is arc eye or welding flash anf how can it be avoided

A

A flash burn occurs when you are exposed to bright ultraviolet (UV) light. This can be avoided by wearing PPE

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12
Q

explain the purpose of backing off every half-turn or so when cutting external and internAL threads

A

to break off (and clear) the waste from the thread being created.

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13
Q

state the three functions of the MIG welding process that occur when the torch trigger is depressed

A

Wire feeds out
sparks are let out
wire is connected to two sheets of material

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14
Q

types of file teeth

A

Single cut -

Double cut

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15
Q

a second cut file is coarser than a bastard file

A

false

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16
Q

Hacksaw

A 
Handle
stud 
stud
Adjustable screw
Blade 
Frame
stud
wingnut adjustment
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17
Q

how do pop rivets hold two pieces of plastic?

A

The pop rivet pliers are used to pull the pin through the rivet and as this happens the rivet is deformed slightly so that it joins the metal or plastic pieces.

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18
Q

should a square material be held in a three-jaw self-centring chuck?

A

No as only only perfectly round material can be held in a three jaw chuck

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19
Q

safety with the lathe

A

PPE

20
Q

possibilities with lack of penetration in a weld

A 
Hasn't touched the surfaces
isn't cleaned with a wire brush
Not enough gas 
Not enough power
No wire
21
Q

What is a ferous metal and what are the traits of it

A

A ferrous metal is any metal that is primarily composed of iron (fe)
and has magnetic properties. A ferrous metal is known for its hardness,
durability and tensile strength. Some common ferrous metals include:
Alloy steel
Carbon steel
Cast iron
Wrought iron

22
Q

What is a non ferous metal and what are the traits

A

Non-ferrous metals are alloys or metals that do not contain
any appreciable amounts of iron.
Non-ferrous metals tend to be more expensive than ferrous
metals but are used for their desirable properties,
including light weight (aluminium), high conductivity
(copper), non magnetic properties or resistance to corrosion
(zinc).

23
Q

What is the 4 main types of welding

A

MMAW - Manual Metal Arc Welding (a.k.a Stick)
GMAW - Gas Metal Arc Welding (a.k.a MIG)
GTAW - Gas Tungsten Arc Welding (a.k.a TIG)
GTAW - Gas Tungsten Arc Welding (a.k.a TIG)

24
Q

Exaplain this type of welding - GTAW - Gas Tungsten Arc Welding (a.k.a TIG)

A

Primarily used in workshop applications for fabrication of sheet
metal and food grade appliances due to its cleanliness - does not
create sparks.

25
Q

Explain OAW - Oxygen Acetylene Welding

A

Primarily used for brazing and welding non-ferrous metals (copper &
brass), most commonly in the plumbing industry.

26
Q

Explain GMAW - Gas Metal Arc Welding (a.k.a MIG)

A
27
Q

MMAW - Manual Metal Arc Welding (a.k.a Stick)

A

Primarily used for onsite welding processes due to its
transportability and use of welding rods which are coated with a
flux which causes a protective slag over the weld as it cools.

28
Q

What PPE is neccary when welding

A

Personal protective equipment must be worn when
welding to protect the face, hands body and feet.
- Welding face shield or goggles
- Heat proof gloves
- Apron

29
Q

Hazzards with the welder

A

Arc flash or welding flash is caused due to exposure to
the harsh UV light caused by welding. This can cause
severe sun like burns to any exposed areas of skin. Arc
flash can cause burns to the cornea of the eye if
welding helmet is incorrectly darkened, or looking at
the welding arc with the naked eye.
- Burns
- Cuts and abrasions
- Illness due to poor ventilation and extraction of
welding fumes
- Electrocution
- Explosion

30
Q

What are common workshop PPE

A 
Safety Glasses
- Hearing protection:    
either ear plugs or muffs
- Riggers gloves
- Overalls or work wear.
- Heavy duty work pants
- UV protectant, high 
visibility work shirt
- Rubber soled and steel 
capped boots
31
Q

What steps need to be in a design process

A 
1. Define or Question - what is the 
problem? 
2. Brainstorm - How can I solve it? 
-  concept drawings
-  discuss ideas
3. Plan & Design - How do I start?
-  materials/cutting list
-  draw working diagrams with sizes
-  steps/fabrication process
4. Build & Create
5. Test & Analyse
    -  Does it work or solve the problem?
    -  Does it meet the clients needs?
6. Reflect/Improve/Modify
32
Q

Define - End User

A

The person who actually uses a particular product. E.g. The client.

33
Q

Define Ergonomics

A

The process of designing or arranging workplaces, products and
systems so that they fit the people who use them.

34
Q

Define Aesthetics

A

Our perception or opinion of an object based on what we see, feel,
hear, smell and even taste. Our opinion could be based on one or all of these
senses.

35
Q

Define Primary Function

A

Is the main function of a product e.g. For a desk clock it is
to tell the time.

36
Q

Define Secondary Function

A

Is the other functions a product will perform e.g. A desk
top clock - has a radio function and acts as a bluetooth speaker, usb charging
point etc.

37
Q

Define Evaluation Criteria

A

A set of questions of which we can measure the
effectiveness and suitability of a product. For example:
● Suitability of design to the client/design brief
● Functionality of the design solution.
● Innovation and originality of the design solution.
● Environmental and physical considerations
● Reality.

38
Q

What do job reqirements tell us

A 
- Materials used, enabling you to form a 
cutting list.
- Tell us about machining or weld 
requirements. E.g. type of weld or 
process, radius of chamfer or hole 
size. 
- See how the product is to be 
constructed. 
- Tolerances +/- for size and finish e.g. 
painted, galvanised, clad etc.
39
Q

What are 5 different types of files

A 
Triangle
Round
Half round
Square 
Flat
40
Q

Parts of a file

A 
--------llllllllllllllllllllllllllllll
Tang
Heel
Belly Point 
Length - first tooth to the end
41
Q

Types of file surfaces

A 
Rasp
Rough - SINGLE
Coarse - SINGLE
Bastard                      -
Second                       l
Smooth                       l       SINGLE OR DOUBLE
Dead Smooth             l
Super Smooth            -
42
Q

What do TAPS do?

A

tap, a screwlike tool that has threads like a bolt and two, three, or four longitudinal flutes or grooves and that is used to cut screw threads in a nut or a hole

43
Q

What are two parts of TAPS

A

tap handle

taps

44
Q

What are bottoming taps

A

Bottoming taps are best used after a
taper or plug tap has been used to cut
the initial thread as they are extremely
hard to start threads with. It is capable
of cutting threads all of the way to the
bottom of a blind hole.

45
Q

What are plug taps

A

Plug taps are great when used with
through-holes, as they are almost as easy
as taper taps to start, but also offer a
more complete set of threads.

46
Q

What is a taper tap

A

A taper tap is most often used as a

starter tap for difficult blind holes.

47
Q

Process of tapping a hole

A

Now that you have a drilled hole, use the
tap of the correct size and a tap handle
to thread the hole.
To begin tapping, rotate the taper bit
clockwise until you feel resistance from
the threads cutting into the material.
From there, for every full rotation
clockwise, make a half rotation
counterclockwise. This will break off any
chips that have been created and clear the
space for the cutting teeth of the tap to
keep cutting. Taps are very brittle, so
accumulation of these chips or any other
extra stress on the tap could cause it to
break in your material.

adv pe (3 decks)

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