Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

MT Lvl 1 > Level 1 Theory > Flashcards

Level 1 Theory Flashcards

1
Q

Iron, Nickel, and Cobalt are what

A

Materials that magnetic particle inspection can be performed on

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Reluctance

A

The opposition that a ferromagnetic material shows to the establishment of a magnetic field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are several advantages over liquid penetrant inspection that Magnetic particle inspection has

A

Components with thin coatings can be inspected without removing the coating and can be inspected more rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

A hysteresis loop

A

Shows the relationship between the Induced magnetic flux density and the magnetizing force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Residual magnetism

A

The magnetic flux density that remains in the material when the magnetizing force is zero

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Domains

A

Small polarized regions that make up Ferromagnetic materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What never cross each other

A

Magnetic lines of force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

A material with a wider hysteresis loop has

A

Lower permeability Higher retentivity Higher coercivity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What forms closed loops from pole to pole

A

Magnetic lines of force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Direct current

A

type of current flows continuously in one direction at a constant voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is a circular field

A

A magnetic field induced by a current carrying conductor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is A magnetic pole

A

A location where a magnetic field can be detected exiting or entering a material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is sometimes restricted to use for potential of arcing that could damage parts

A

Prods

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When testing parts with magnetic particles, it is best to magnetize the part how

A

In two directions at right angles to each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why are all materials affected in some way by a magnetic field

A

Because all matter is composed of atoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When does the best detection of defects occur

A

When the lines of magnetic force are perpendicular to the longest dimension of the defect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is A magnetic field

A

A volume of space where there is a change in magnetic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

When is a material considered demagnetized

A

When its residual magnetic field measures less than 3 gauss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

A material with a Higher permeability has a what

A

A narrower hysteresis loop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Components generally must be demagnetized because residual magnetism can what

A

Increase wear by attracting abrasive particles, Affect machining and welding processes, or Interfere with near by electronic components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Faraday’s Law of Magnetic Induction

A

The magnetic forces of the material’s electrons will be affected by an external magnetic field

22
Q

High residual magnetism is found in what material

A

A material with a wider hysteresis loop

23
Q

Magnetically saturated

A

When all the magnetic domains are aligned

24
Q

Direct induction needs

A

Good electrical contact must be established between the test equipment and test component

25
Q

When the magnetizing current is stopped, a ferromagnetic material will what

A

Retain a residual magnetic field withing the component

26
Q

Permeability

A

Describes the ease with which a magnetic flux is established in a component is called

27
Q

Coercive force

A

The amount of reverse magnetic field which must be applied to a magnetic material to reduce the magnetic flux to zero

28
Q

It is easier to measure a longitudinal field when

A

When using both a circular and longitudinal magnetic field

29
Q

When a ferromagnetic material is in a unmagnetized state, the domains are

A

Randomly organized

30
Q

What establishes a magnetic field that extends from the ID to the OD of a circular part

A

The circular conductor technique

31
Q

Magnetic flux density

A

The number of magnetic lines of force cutting thorugh a plane of a given area at a right angle

32
Q

When performing a magnetic particle test with a coil, the part should be placed where

A

Along the inside edge of the coil

33
Q

Ferromagnetic

A

Has a large susceptibility to magnetic field

34
Q

A yoke establishes a magnetic field

A

Between the north and south poles of the yoke

35
Q

A circular magnetic field has lines of force that run where

A

Circumferentially around the perimeter of the part

36
Q

What happens when a magnetic field cuts across a crack

A

Magnetic poles form at the edges of the crack

37
Q

Dipole

A

An object that has a magnetic pole on one end and a second equal but opposite magnetic pole on the other

38
Q

Iron filings

A

small magnetic particles used in magnetic particle inspection

39
Q

Higher permeability, Lower retentivity, and Lower coercivity are components of what

A

Narrower hysteresis loop

40
Q

Are dry magnetic particles one color, non-reusable, or one size?

A

Non-reusable

41
Q

You will find subsurface or surface indications with magnetic particle testing

A

Subsurface

42
Q

Diamagnetic materials

A

Have a very weak and negative susceptibility to magnetic field

43
Q

Multidirectional inspection equipment does what

A

Reduces inspection time

44
Q

A material with Higher reluctance has a what

A

A wider hysteresis loop

45
Q

Coercive force

A

The force required to remove the residual magnetism from the material

46
Q

The magnetic field circling each loop of wire in a coil combines with the fields from the other loops to produce a concentrated field

A

Down the center of the coil

47
Q

A material with Lower coercivity has a what

A

A narrow hysteresis loop

48
Q

Whats the purpose of heating materials above their curie temperature or reversing and decreasing magnetic field

A

Demagnetized

49
Q

North Pole

A

The area where the exit poles are concentrated

50
Q

A longitudinal magnetic field has magnetic lines of force that run

A

Parallel

MT Lvl 1 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions