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Module 7: Maintenance Practices (B1) > 7.10: Springs > Flashcards

7.10: Springs Flashcards

1
Q
A

high carbon alloy steel with high strength requirements

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2
Q
A

Length under load

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3
Q

Springs are made from _____________________________

A

Springs are made from high carbon alloy steel with high strength requirements

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4
Q

Wear check on a spring should include ____________

A

Wear check on a spring should include length under load

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5
Q

How can overheated springs be identified?

A

Overheated springs can be identified by a change of colour. Such as a blue sheen

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6
Q

What do helical springs suffer from?

A

Helical springs suffer from Float. The spring vibrates and it loses performance

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7
Q

What are the 3 things to look for when inspecting springs? (Static inspection)

A

Static indications when inspecting.

  1. Free height measurement
  2. Parallelism
  3. Squareness
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8
Q

How would you test for fatigue in a spring?

A

Test for fatigue, spring returns to its original free length

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9
Q

How should disc/belleville springs be inspected?

A

Disc/bellevile springs should be inspected for condition and correct assembly

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10
Q
A

Option A: High carbon or alloy steel with low working stresses

'’Springs are made from hardended (high carbon) or alloy steel, and work under low stress to keep them within the elastic range’’

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11
Q
A

Option A: length under load

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12
Q
A

Option A: high carbon alloy steel with high strength requirements

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13
Q
A

Hard drawn wire

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14
Q
A

loss of elasticity

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15
Q
A

can be caused during the shot peening process and should not be rejected

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16
Q
A

radial force

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17
Q
A

length under load

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18
Q
A

Nickel chromium

19
Q
A

constant spring

20
Q
A

High carbon or alloy steel with low working stresses

Springs are made from hardened (high carbon) or alloy steel, and work under low stress to keep them within the elastic range

21
Q
A

Compression spring

22
Q
A

straight line

23
Q
A

hard drawn wire

24
Q
A

high carbon alloy steel with high strength requirements

25
Q
A

overheating

26
Q
A

Beryllium Copper

27
Q
A

1/ length, strength and squareness

28
Q
A

2/ Test the spring returns to its original free length

Fatigue Test of a spring - Spring Should return to it’s original FREE LENGTH

29
Q
A

2/ Free height measurement, parallelism, and squareness

30
Q
A

3/ the change in the colour

31
Q
A

2/ visually for condition and correct assembly

32
Q
A

c/ the spring vibrates in such a way that it loses performance

33
Q

If one unit of compressive force is applied to a spring within its elastic limits what should be the effect?

A

the spring will strain a proportional amount

‘’Deflection graph for helical wound spring is LINEAR = DEFLECTION IS DIRECTLY PROPORTIONAL TO LOAD APPLIED’’

34
Q

Are Compressive springs wound left or right handed?

A

Compressive springs are wound left or right handed

35
Q

What load are spring hooks subjected to?

(a) Tension
(b) Compression

© Twisting

A

(a) Tension

36
Q

A spring should be inspected for correct? (3)

A

length, strength and squareness

37
Q

How do we test springs for fatigue?

A

FATIGUE TEST - Spring should return to its original FREE LENGTH

38
Q

Torsion bar springs are?

A

Cylindrical

39
Q

Which material is best for making springs which need to operate at high tensile loads?

A

Music wire

40
Q

A load deflection chart of a normal spring operated within its elastic limit would show

A

A linear path/proportional

41
Q

A torsion spring is often used to control what type of input to a door lever?

A

Twisting load

42
Q

Evenly ground helical springs have

A

non linear

43
Q

Helical springs sometimes suffer from ‘Float’, what is this?

A

The spring vibrates in such a way that it loses performance

Module 7: Maintenance Practices (B1) (20 decks)

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