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Science Sec4- MG > Engineering Shit > Flashcards

Engineering Shit Flashcards

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1
Q

What are the 5 types of constraints?

A

Compression, tension, torsion, deflection, shearing

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2
Q

Description of compression

A

Forces that tend to crush it

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3
Q

Description of tension

A

Forces that tend to stretch it

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4
Q

description of torsion

A

forces that tend to twist it

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5
Q

description of deflection

A

forces that tend to bend it

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6
Q

description of shearing

A

forces that tend to cut it

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7
Q

hand squeezing a wet sponge is an example of which constraint?

A

compression

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8
Q

a foot crushing a can is an example of which constraint?

A

compression

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9
Q

copper stretched into a wire is an example of which constraint?

A

tension

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10
Q

an earthquake twisting a bridge is an example of which constraint?

A

torsion

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11
Q

a hand wringing a wet towel is an example of which constraint?

A

torsion

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12
Q

fish bending a fishing rod is an example of which constraint?

A

deflection

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13
Q

clothes weighing down a clothesline is an example of which constraint?

A

deflection

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14
Q

scissors cutting paper is an example of which constraint?

A

shearing

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15
Q

metal cutters trimming shapes from metal is an example of which constraint?

A

shearing

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16
Q

whats the symbol for compression?

A

two arrows facing each other

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17
Q

whats the symbol for tension

A

two arrows facing apart

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18
Q

whats the symbol for torsion?

A

two arrows in a circular shape

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19
Q

whats the symbol for deflection?

A

three arrows: middle one facing up and other two downwards

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20
Q

whats the symbol for shearing?

A

two arrows facing each other except the arrowhead is half off???

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21
Q

what does constraint mean?

A

the effects of eternal forces upon objects

22
Q

what is material deformation?

A

constraints have a tendency to deform objects/change their shape

23
Q

what are the three types of material deformation?

A

elastic, plastic, fracture

24
Q

what is the description of elastic?

A

a temporary change in the shape or dimensions of the material. When constraint is removed, the material returns back to its original shape.

25
Q

a rope pulled tightly by a mountain climber is an example of which material deformation?

A

elastic

26
Q

a rope becoming frayed is an example of which deformation?

A

plastic

27
Q

what is the description for plastic?

A

a permanent change in the shape or dimensions of the material

28
Q

what is the description for fracture?

A

the material breaks

29
Q

a glass breaking is an example of which material deformation?

A

fracture

30
Q

what is degradation? Can protection be used?

A

the decline in its properties due to the effects of its environment. protection can be used to prevent or delay degradation such as zinc coating, anti-rust treatment, varnish, etc.

31
Q

what is hardness?

A

ability to resist indentation, abrasion (scratches) deformation

32
Q

what is resilience?

A

the ability to resist shocks without breaking- often by deforming and returning to its original shape.

33
Q

what is stiffness?

A

the ability to retain its original shape when subjected to a constraint

34
Q

what is toughness?

A

the ability of a material to absorb energy and plastically deform without fracturing (does not return to its original shape)

35
Q

what is ductility?

A

the ability to be stretched into a wire without breaking (*property of metals used for manufacturing only)

36
Q

what is malleability?

A

the ability to be flattened into a sheet or bent (shaped) without breaking (*property of metals used for manufacturing only)

37
Q

what are the 7 mechanical properties of metals? (MRSEDTH)

A

Malleability, resilience, stiffness, elasticity. ductility, toughness, hardness

38
Q

what are links?

A

a link holds two or more parts of the same technological object together

39
Q

t/f: glue is considered a linking component

A

true

40
Q

what is the description of a direct link?

A

two parts held together without a linking component

41
Q

what is the description of an indirect link?

A

a linking component is required to hold two parts together

42
Q

im not going over rigid/flexible and complete/partial cause they’re ez

A

yay

43
Q

what is the description of a removable link?

A

the linked parts can be separated without damaging either their surfaces or the linked component

44
Q

what is the description of a non-removable link?

A

the linked parts cannot be separated without damaging either their surfaces or the linked component

45
Q

what is the function of a guiding control?

A

to guide the motion of moving parts

46
Q

what are the three types of guiding controls?

A

translational, rotational, helical

47
Q

what is a driver component?

A

receives the forces requires to activate the system (ex petal on a bike)

48
Q

what is the driven component?

A

receives the motion and transfers it to another part (ex wheel on a bike)

49
Q

what is the intermediate component?

A

located between the driver and driven components. a motion transmission system may have several intermediate components. (ex chain on bike transferring motion from petal to wheel)

50
Q

how can a system be considered reversible?

A

if the driver and driven component can be interchanged and the system still functions. opposite for irreversible systems.

51
Q

review motion transmission/transformation systems cause they aint here

A

;)

Science Sec4- MG (2 decks)

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