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block

The proper number of ampere-turns for a given test specimen being examined by longitudinal magnetism is determined by:

Select the correct answer(s).  

(0/0)

---

its diameter.

the material and the length.

its length and diameter.

the diameter and the material.

none

The retentivity of a material describes the:

Select the correct answer(s).  

(0/0)

---

depth of the magnetic field in the part.

ease with which it can be magnetized.

length of time required to demagnetize it.

ability to retain the magnetic field.

none

The magnetic field is strongest when the:

Select the correct answer(s).  

(0/0)

---

material exhibits high coercive forces.

magnetizing current is not flowing.

magnetizing current is flowing.

magnetizing voltage is flowing.

none

What rule describes the direction of current flow (+ to -) when lines of magnetic force surround a conductor?

Select the correct answer(s).  

(0/0)

---

Right-hand rule.

Flux rule.

Left-hand rule

Reluctance rule.

none

The unit usually used to denote flux density is:

Select the correct answer(s).  

(0/0)

---

henry.

farad.

ampere.

tesla.

none

Magnetic flux lines that are parallel to a discontinuity produce:

Select the correct answer(s).  

(0/0)

---

weak indications.

strong indications.

fuzzy indications.

no indications.

none

Which of the following can be magnetized?

Select the correct answer(s).  

(0/0)

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Magnesium.

Aluminum.

Copper.

Iron.

none

Magnetic particle is a nondestructive testing method used for:

Select the correct answer(s).  

(0/0)

---

finding and measuring material separation.

locating surface and near-surface discontinuities in steel.

measuring flux density.

locating surface and near-surface discontinuities in aluminum.

none

Which statement is true when related to magnetic lines of force?

Select the correct answer(s).  

(0/0)

---

They are most dense at the poles of a magnet.

They seek the path of most resistance.

They are often forced to cross due to part geometry.

They cannot be detected.

none

Ferromagnetic material is:

Select the correct answer(s).  

(0/0)

---

not highly saturated by magnetic fields.

not capable of being magnetized.

strongly attracted by a magnetic field.

a material with a 0 permeability measurement.

none

A part is susceptible to magnetic particle inspection if:

Select the correct answer(s).  

(0/0)

---

it is attached to an electrostatic field

the material is an electric conductor.

the material is non-ferrous.

the material is ferromagnetic.

none

The permeability of a material describes the:

Select the correct answer(s).  

(0/0)

---

ength of time required to demagnetize it.

depth of the magnetic field in the part.

ease with which it can be magnetized.

ability to retain the magnetic field.

none

If a crack exists in a circular magnet, the attraction of magnetic particles to the crack is caused by a:

Select the correct answer(s).  

(0/0)

---

Doppler effect.

coercive force

leakage field.

high reluctance at the crack.

none

The magnitude of the residual magnetic field in a specimen is dependent on the:

Select the correct answer(s).  

(0/0)

---

right-hand rule.

strength of the applied magnetizing force.

length-to-diameter ratio (L/D).

left-hand rule.

none

Magnetic particles are available in different colors:

Select the correct answer(s).  

(0/0)

---

to indicate different magnetic flux values.

for color contrast with the part surface thereby enhancing detection of indications.

to determine if an indication is surface or subsurface.

to enhance the detection of indications by allowing background color matching.