IREM MNT 402 UPDATED MAIN 2026 EOC QUESTIONS AND
ANSWERS SURE A+
✔✔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
✔✔The area where the exit poles are concentrated is called the magnet's: (a) South
pole (b) North pole (c) Dipole (d) Flux density - ✔✔North Pole
✔✔The best detection of defects occurs: (a) When the magnetic field is 10% beyond its
saturation point (b) When the hysteresis loop shifts from positive to negative (c) When
the lines of magnetic force are parallel to the longest dimension of the defect (d) When
the lines of magnetic force are perpendicular to the longest dimension of the defect -
✔✔(d) When the lines of magnetic force are perpendicular to the longest dimension of
the defect
✔✔The central conductor technique is sometimes used because it: (a) Allows large
diameter circular parts to be completely inspected with one application of the
magnetizing force (b) Produces a longitudinal field in circular parts (c) Establishes a
magnetic field that extends from the ID to the OD of a circular part (d) None of the
above - ✔✔(c) Establishes a magnetic field that extends from the ID to the OD of a
circular par
✔✔The force required to remove the residual magnetism from the material is called the:
(a) Inverse force (b) Reciprocal force (c) Coercive force (d) Residual force -
✔✔Coercive Force
✔✔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) Which is maximized around the
outside of the coil (b) Around each loop of the coil (c) Down the center of the coil (d) All
of the above - ✔✔(c) Down the center of the coil
✔✔The magnetic flux density that remains in the material when the magnetizing force is
zero is called: (a) Retentivity (b) Residual magnetism (c) Coercive force (d) Permeability
- ✔✔(b) Residual magnetism
✔✔The number of magnetic lines of force cutting through a plane of a given area at a
right angle is known as the: (a) Magnetic flux leakage (b) Magnetic flux density (c)
Magnetic ampere (d) None of the above - ✔✔(b) Magnetic flux density
✔✔The opposition that a ferromagnetic material shows to the establishment of a
magnetic field is called: (a) Retentivity (b) Reluctance (c) Coercive force (d)
Permeability - ✔✔(b) Reluctance
ANSWERS SURE A+
✔✔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
✔✔The area where the exit poles are concentrated is called the magnet's: (a) South
pole (b) North pole (c) Dipole (d) Flux density - ✔✔North Pole
✔✔The best detection of defects occurs: (a) When the magnetic field is 10% beyond its
saturation point (b) When the hysteresis loop shifts from positive to negative (c) When
the lines of magnetic force are parallel to the longest dimension of the defect (d) When
the lines of magnetic force are perpendicular to the longest dimension of the defect -
✔✔(d) When the lines of magnetic force are perpendicular to the longest dimension of
the defect
✔✔The central conductor technique is sometimes used because it: (a) Allows large
diameter circular parts to be completely inspected with one application of the
magnetizing force (b) Produces a longitudinal field in circular parts (c) Establishes a
magnetic field that extends from the ID to the OD of a circular part (d) None of the
above - ✔✔(c) Establishes a magnetic field that extends from the ID to the OD of a
circular par
✔✔The force required to remove the residual magnetism from the material is called the:
(a) Inverse force (b) Reciprocal force (c) Coercive force (d) Residual force -
✔✔Coercive Force
✔✔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) Which is maximized around the
outside of the coil (b) Around each loop of the coil (c) Down the center of the coil (d) All
of the above - ✔✔(c) Down the center of the coil
✔✔The magnetic flux density that remains in the material when the magnetizing force is
zero is called: (a) Retentivity (b) Residual magnetism (c) Coercive force (d) Permeability
- ✔✔(b) Residual magnetism
✔✔The number of magnetic lines of force cutting through a plane of a given area at a
right angle is known as the: (a) Magnetic flux leakage (b) Magnetic flux density (c)
Magnetic ampere (d) None of the above - ✔✔(b) Magnetic flux density
✔✔The opposition that a ferromagnetic material shows to the establishment of a
magnetic field is called: (a) Retentivity (b) Reluctance (c) Coercive force (d)
Permeability - ✔✔(b) Reluctance
