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Mod 6 > 6.7 > Flashcards

6.7 Flashcards

1
Q

What is Elasticity

A

Absorbing Energy and returning to original position without fracture

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2
Q

What force does a Helical Compression Springs Resist

A

Compressive Forces

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3
Q

What stresses are Helical Compressive Springs under

A

Torsion Forces

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4
Q

Can a compression spring be over stressed

A

No

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5
Q

What are Plain Ends

A

Chopped at length

Large Index

Used for Light Duty Applications

Used in Compressive Springs

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6
Q

What is Index

A

Ratio of Wire Diam and Mean Diam

Tightness of Compression Spring Coils

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7
Q

What are Closed Ends

A

Ground End with Extra Turns at the end

Used in Compressive Springs

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8
Q

What are Ground Ends

A

Flat End

Uniform Load Distribution

Used in Compressive Springs

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9
Q

Where is the Larger Diam in Barrell Comp String

A

In the Middle

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10
Q

What ends are on Barrell Convex Comp Spring

A

Closed Ends

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11
Q

What is the benefit of Barrel Springs

A

Less likely to bend under load

Allows for springs to be made longer

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12
Q

Where is the smaller Diam in Cone Comp Springs

A

At one end

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13
Q

What is the benefit of Cone Comp Springs

A

Loads to be achieved at lower Heights

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14
Q

Where is the Smaller Diam in Hourglass Comp Springs

A

In the Middle

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15
Q

What is the benefit of Hourglass Comp Spring

A

Lowered Solid Height

Improved Stability

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16
Q

What forces to Tension Springs Resist

A

Tension

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17
Q

What stresses are Tension Springs under

A

Torsion Stresses

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18
Q

Can Tension Springs be over stressed

A

Yes

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19
Q

What ends are used on Tension Springs

A

Hooked or Looped

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20
Q

What ends are used on Compression Springs

A

Plain

Ground

Closed

Contra Wound

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21
Q

What spring is more likely to fail due to fatigue

Compressive or Tension

A

Tension

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22
Q

Where are Spring Rods used

A

In place of Tension Springs in Safety Critical Areas

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23
Q

Spring rods use what kind of spring

A

Compressive Spring acting as a Tension Spring

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24
Q

What forces to Helical Torsion Springs Resist

A

Torsion Forces

25
Q

What stresses are Torsion Springs subjected to

A

Bending Stresses

26
Q

Where are Torsion Spring Rods Used and for what purpose

A

In flight controls

For Deflection Proportion

27
Q

Where are Coned Disk / Bellnell Springs used

A

In Compression with Limited Space

28
Q

A flat spring is a

A

Leaf spring with only one flex component

29
Q

What is Boyles Law in relation to Pneumatic Springs

A

Reducing Volume = Increases Pressure

30
Q

How do Pneumatic Springs Dampen Motion

A

Motion to Pressure to Heat

31
Q

Where are Liquid Springs Used

A

For Shock Absorbers in Landing Gear

32
Q

How do Liquid Springs Dampen

A

Pressure to Heat

33
Q

Where are Elastomeric Springs used

A

Rubber Block Between 2 Compents

34
Q

Characteristic of Carbon Spring Steel

A

Strongest of the 3 materials used

Corrodes Easily

35
Q

What is Max Op Temp of Carbon Spring Steel

A

150 °C

36
Q

What colour / finish is on Carbon Spring Steel

A

Shiney

37
Q

Characteristics of Stainless

A

3rd Strongest

High Corrosion Resistance

38
Q

What is Max Op Temp of Stainless Steel in Springs

A

300 °C

39
Q

What colour or finish is on Stainless steel springs

A

Yellow

40
Q

What are characteristics of Inconel X750

A

Second Strongest

High temp resistance

41
Q

What is max op temp of InconelX750

A

550 °C

42
Q

What colour or finish has InconelX750

A

Brown

43
Q

When are steels Cold Wound

A

Below 9.5mm and 18.5mm

44
Q

When are steels Hot Wound

A

Above 9.5mm to 18.5mm

45
Q

What Materials are Cold Rolled

A

Carbon And Manganese Alloys

46
Q

What Non Ferrous Metals are used to make Springs

A

Copper Alloys

Nickel Alloys

Composite

47
Q

What is Pitch

A

Gap between Rings

48
Q

What is Wire Diameter

A

Width of Rings / Material

49
Q

What is Measurement Diam

A

Center of Ring to Ring

50
Q

What is the Ratio of Mean Coil

A

Coil Diam : Wire Diam

51
Q

What is Spring Rate

A

Change in Load per Unit of Deflection (lbs/in or N/mm)

52
Q

Linear springs

A

Obey hooks law

53
Q

What is Hooks Law

A

Stress is directly proportional to Strain

54
Q

What is a Regressive Spring

A

Load is less than Deflection

55
Q

What is Progressive spring

A

Load is greater than Deflection

56
Q

Compression Linearity Depends on

A

Spring Diam

Wire Diam

Pitch

Overall Length

57
Q

Tension Linearity Depends on

A

Spring Diam

Overall Length

58
Q

What Is a loaded height

A

Height of a spring when a load is present

Mod 6 (8 decks)

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