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ENME 221 > Design and Manufacture > Flashcards

Design and Manufacture Flashcards

1
Q

What is the purpose of limits and fits?

A

Max interchangeability

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2
Q

Which process can most readily achieve a 0.2 Ra surface finish?

A

Dimond Machining

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3
Q

What letter and number represents a tight fit?

A

p6

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4
Q

ϕ8 +0.036 -0.000. What is the
MMC?

A

8.036

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5
Q

Blow moulding is used for what products?

A

Hollow containers

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6
Q

Identify what DFMA solution would be appropriate for eliminating threaded
fasteners.

A

Clips

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7
Q

What is not a solid state welding process?

A

MIG

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8
Q

What is the kurf? related to cutting.

A

Width of the cut

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9
Q

What process is used for creating a ultra smooth surface?

A

Lapping

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10
Q

How do you repair a stripped thread?

A

Use a helicoil

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11
Q

What process is best used for an internal keyway?

A

Broaching

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12
Q

Name a method of brazing

A

Vacuum

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13
Q

What process should be used for long lengths that need to be cut for heat sinks in electronics?

A

Rolling

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14
Q

What process for mass producing carburetor bodies?

A

Hard metal die casting

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15
Q

TIG and MIG welders use inert gas around the weld pool. Why?

A

Protect from environment

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16
Q

What welding technique is good for thin sheets

A

TIG

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17
Q

What is an ideal solution to prevent loosening?

A

Nylock nuts

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18
Q

A frame sits on metal skids, what are these made of?

A

Hot rolled channels

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19
Q

What process is used to make metal sheets spherical?

A

Spinning

20
Q

What protection is used for exposer to environment?

A

Galvanization

21
Q

What is the most likely method of cutting a thin sheet with lots of cutouts?

A

CNC turret punch

22
Q

What is the most efficient and easy type of welding?

A

MIG

23
Q

What does CNC stand for?

A

Computer numerical control

24
Q

What does CAM stand for?

A

Computer aided machining

25
Q

What is the rule of 10 in DFMA?

A

Costs 10 x more to fix a defect at each stage of assembly

26
Q

What is concurrent engineering?

A

Design development in parallel with manufacturing process

27
Q

What is top down assembly?

A

Start building from a base and adding things on top

28
Q

What material is often used for round bar, plate, sheets, rectangular bar, hex bar?
(Hint: Will rust)

A

Cold rolled steels

29
Q

What material is often referred to as Black due to its oxide scale?

A

Hot rolled steels (I beam and channel steel)

30
Q

What are the carbon % of low, medium, high and ultra high carbon steel?

A

0.05-0.25, 0.3-0.5 (balances with ductility, durable, large parts), 0.6-1 (very strong, springs shafts and tools) and 1.25-2 (tempered, special uses like punches and knives) respectively

31
Q

What caron content is silver steal?

A

high - ultra high carbon, 0.8-2%

32
Q

Drills, taps and dies are made from….

A

High speed steal (medium to high carbon content)

33
Q

hydraulics, rams are usually made from….

A

Hard chrome bar (steel with chrome painting, non-corrosive)

34
Q

What material is used for domestic plumbing?

A

Copper

35
Q

Pots, pans, hospital equipment are made from….

A

stainless steel (corrosion resistant)

36
Q

What tool is used to make sure cap screws are flush?

A

Counter boring tool

37
Q

What are 2 visual features of an oxygen gas bottle?

A

Black with a right-hand thread

38
Q

What is the likely process for making a mould cavity in steel?

A

Spark erosion

39
Q

What is the process for making cans?

A

Reverse extrusion

40
Q

What kind of soldering used to attach terminals onto an Arduino micro-controller circuit board?

A

Wave

41
Q

A 12mm diameter stainless steel tube must be welded to a brass threaded fitting. What process used?

A

Vacuum brazing

42
Q

Are left or right-hand threads more common.

A

Right

43
Q

what are the 3 types of welding?

A

Fusion (melting the 2 parts), diffusion (1-part melts then diffuses into the next) and solid state (heat or pressure used but no melting)

44
Q

Arc and resistance welding are….

A

Fusion welds

45
Q

Gas metal ARC welds are also known as…

A

MIG

46
Q

Gas tungsten ARC welding is also known as…

A

TIG

ENME 221 (1 decks)

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