IREM MNT 402 CORE EXAMS MAIN 2026 QUESTIONS AND
ANSWERS SURE A+
✔✔A material with a wider hysteresis loop has: (a) Higher reluctance (b) Higher
permeability (c) Lower retentivity (d) All of the above - ✔✔(a) Higher reluctance
✔✔A material with a wider hysteresis loop has: (a) Lower reluctance (b) Lower residual
magnetism (c) Higher residual magnetism (d) Higher permeability - ✔✔(c) Higher
residual magnetism
✔✔A property of a material that describes the ease with which a magnetic flux is
established in a component is called: (a) Retentivity (b) Residual magnetism (c)
Coercive force (d) Permeability - ✔✔(d) Permeability
✔✔A volume of space where there is a change in magnetic energy is called: (a) A
magnetic field (b) A magnetic dipole (c) A magnetic pole (d) A magnetic domain - ✔✔(a)
A magnetic field
✔✔A yoke establishes a magnetic field: (a) That can be constant or pulsed (b) Between
the north and south poles of the yoke (c) Equally in all directions around the poles (d)
Both A and B - ✔✔(b) Between the north and south poles of the yoke
✔✔An object that has a magnetic pole on one end and a second equal but opposite
magnetic pole on the other is called a: (a) Dipole (b) Inductor (c) Capacitor (d) A
ferromagnetic material - ✔✔(a) Dipole
✔✔Components generally must be demagnetized because residual magnetism can: (a)
Affect machining and welding processes (b) Interfere with near by electronic
components (c) Increase wear by attracting abrasive particles (d) All of the above -
✔✔(d) All of the above
✔✔Dry magnetic particles: (a) Cannot be reused (b) Come in only one color (c) Are all
of uniform size (d) None of the above - ✔✔(a) Cannot be reused
✔✔Faraday's Law of Magnetic Induction states that: (a) The flow of electrons can be
used to generate a magnetic field (b) The magnetic forces of the material's electrons will
be affected by an external magnetic field (c) Iron filings can be used to produce an
indication of a flaw (d) Flux leakage is the byproduct of magnetic fields when testing
aluminum alloys - ✔✔(b) The magnetic forces of the material's electrons will be affected
by an external magnetic field
✔✔Ferromagnetic materials are made up of small polarized regions known as: (a)
Photons (b) Quarks (c) Electrons (d) Domains - ✔✔(d) Domains
, ✔✔Magnetic lines of force: (a) Have the same strength (b) Seek the path of least
resistance (c) Decrease in density with increasing distance from the poles (d) All of the
above - ✔✔(d) All of the above
✔✔Magnetic lines of force: (a) Form closed loops from pole to pole (b) Will shift 180
degrees when a direct current is applied (c) Were discovered by Wilhelm Hurst (d) None
of the above - ✔✔(a) Form closed loops from pole to pole
✔✔Magnetic lines of force: (a) Almost never cross each other (b) Commonly cross each
other (c) Will shift 90 degrees when a direct current is applied (d) Never cross each
other - ✔✔Never cross eachother
✔✔Magnetic particle inspection has several advantages over liquid penetrant inspection
which include: (a) Components with thin coatings can be inspected without removing
the coating (b) Components can be inspected more rapidly (c) The technique is more
portable (d) Both A and B - ✔✔Both A and B
✔✔Magnetic particle inspection can be performed on parts made from which materials?
(a) Iron, nickel, copper (b) Iron, nickel, cobalt (c) Nickel, cobalt, copper (d) Iron only -
✔✔Iron, nickel, cobalt
✔✔Magnetic particle inspection uses small ferromagnetic particles similar to: (a) Copper
filing (b) Iron filings (c) Magnesium filings (d) Permanent Magnets - ✔✔Iron Filings
✔✔Materials can be demagnetized by: (a) Heating above their curie temperature (b)
Subjecting the component to a reversing and decreasing magnetic field (c) Both A and
B (d) None of the above - ✔✔Both A and B
✔✔Multidirectional inspection equipment: (a) Provides a more sensitive inspection (b)
Provides a less sensitive inspection (c) Can be used without the need for QQIs (d)
Reduces inspection time - ✔✔(d) Reduces inspection time.
✔✔Since all matter is composed of atoms: (a) All parts can be tested with MPI if they
are heated to their curie temperature (b) All materials can be tested with a MPI
regardless of temperature (c) All materials are affected in some way by a magnetic field
(d) None of the above - ✔✔(c) All materials are affected in some way by a magnetic
field
✔✔The amount of reverse magnetic field which must be applied to a magnetic material
to reduce the magnetic flux to zero is called: (a) Retentivity (b) Residual magnetism (c)
Coercive force (d) Permeability - ✔✔Coercive force
ANSWERS SURE A+
✔✔A material with a wider hysteresis loop has: (a) Higher reluctance (b) Higher
permeability (c) Lower retentivity (d) All of the above - ✔✔(a) Higher reluctance
✔✔A material with a wider hysteresis loop has: (a) Lower reluctance (b) Lower residual
magnetism (c) Higher residual magnetism (d) Higher permeability - ✔✔(c) Higher
residual magnetism
✔✔A property of a material that describes the ease with which a magnetic flux is
established in a component is called: (a) Retentivity (b) Residual magnetism (c)
Coercive force (d) Permeability - ✔✔(d) Permeability
✔✔A volume of space where there is a change in magnetic energy is called: (a) A
magnetic field (b) A magnetic dipole (c) A magnetic pole (d) A magnetic domain - ✔✔(a)
A magnetic field
✔✔A yoke establishes a magnetic field: (a) That can be constant or pulsed (b) Between
the north and south poles of the yoke (c) Equally in all directions around the poles (d)
Both A and B - ✔✔(b) Between the north and south poles of the yoke
✔✔An object that has a magnetic pole on one end and a second equal but opposite
magnetic pole on the other is called a: (a) Dipole (b) Inductor (c) Capacitor (d) A
ferromagnetic material - ✔✔(a) Dipole
✔✔Components generally must be demagnetized because residual magnetism can: (a)
Affect machining and welding processes (b) Interfere with near by electronic
components (c) Increase wear by attracting abrasive particles (d) All of the above -
✔✔(d) All of the above
✔✔Dry magnetic particles: (a) Cannot be reused (b) Come in only one color (c) Are all
of uniform size (d) None of the above - ✔✔(a) Cannot be reused
✔✔Faraday's Law of Magnetic Induction states that: (a) The flow of electrons can be
used to generate a magnetic field (b) The magnetic forces of the material's electrons will
be affected by an external magnetic field (c) Iron filings can be used to produce an
indication of a flaw (d) Flux leakage is the byproduct of magnetic fields when testing
aluminum alloys - ✔✔(b) The magnetic forces of the material's electrons will be affected
by an external magnetic field
✔✔Ferromagnetic materials are made up of small polarized regions known as: (a)
Photons (b) Quarks (c) Electrons (d) Domains - ✔✔(d) Domains
, ✔✔Magnetic lines of force: (a) Have the same strength (b) Seek the path of least
resistance (c) Decrease in density with increasing distance from the poles (d) All of the
above - ✔✔(d) All of the above
✔✔Magnetic lines of force: (a) Form closed loops from pole to pole (b) Will shift 180
degrees when a direct current is applied (c) Were discovered by Wilhelm Hurst (d) None
of the above - ✔✔(a) Form closed loops from pole to pole
✔✔Magnetic lines of force: (a) Almost never cross each other (b) Commonly cross each
other (c) Will shift 90 degrees when a direct current is applied (d) Never cross each
other - ✔✔Never cross eachother
✔✔Magnetic particle inspection has several advantages over liquid penetrant inspection
which include: (a) Components with thin coatings can be inspected without removing
the coating (b) Components can be inspected more rapidly (c) The technique is more
portable (d) Both A and B - ✔✔Both A and B
✔✔Magnetic particle inspection can be performed on parts made from which materials?
(a) Iron, nickel, copper (b) Iron, nickel, cobalt (c) Nickel, cobalt, copper (d) Iron only -
✔✔Iron, nickel, cobalt
✔✔Magnetic particle inspection uses small ferromagnetic particles similar to: (a) Copper
filing (b) Iron filings (c) Magnesium filings (d) Permanent Magnets - ✔✔Iron Filings
✔✔Materials can be demagnetized by: (a) Heating above their curie temperature (b)
Subjecting the component to a reversing and decreasing magnetic field (c) Both A and
B (d) None of the above - ✔✔Both A and B
✔✔Multidirectional inspection equipment: (a) Provides a more sensitive inspection (b)
Provides a less sensitive inspection (c) Can be used without the need for QQIs (d)
Reduces inspection time - ✔✔(d) Reduces inspection time.
✔✔Since all matter is composed of atoms: (a) All parts can be tested with MPI if they
are heated to their curie temperature (b) All materials can be tested with a MPI
regardless of temperature (c) All materials are affected in some way by a magnetic field
(d) None of the above - ✔✔(c) All materials are affected in some way by a magnetic
field
✔✔The amount of reverse magnetic field which must be applied to a magnetic material
to reduce the magnetic flux to zero is called: (a) Retentivity (b) Residual magnetism (c)
Coercive force (d) Permeability - ✔✔Coercive force
