Top 150+ Solved Magnetic Particle Testing Level 1 MCQ Questions Answer
Q. The most common cause of non relevant indications in MT is:
a. Over magnetisation
b. Low amperage
c. High flux density
d. Under magnetisation
Q. When a ferromagnetic material is in an unmagnetized state, the domains are:
a. Aligned in a North and South direction
b. Aligned in an East West direction
c. Randomly organized
d. Balanced to produce a gauss rating of 2
Q. Paramagnetic materials:
a. Are commonly inspected using magnetic particle testing
b. Are affected by magnetic fields
c. Cannot be magnetized
d. Have low reluctance to establishment of magnetic flux
Q. What type of magnetization uses the formula: I = 45000/(L/D)N where I is the current in Amperes, N the number of turns of the magnetizing coil, L the length of the cylindrical test piece and D its diameter.
a. Circular
b. Longitudinal
c. Swinging field
d. Central conductor
Q. The magnetic field is the strongest when:
a. The magnetising current is flowing
b. The magnetising voltage is applied
c. The leakage field is flowing
d. The magnetising current is off
Q. The retentivity of a material describes:
a. The length of time required to demagnetise it
b. The depth of the magnetic field in the part
c. The ability to retain the magnetic field
d. The ease with which it can be demagnetized
Q. A material with a wider hysteresis loop has:
a. Lower reluctance
b. Lower residual magnetism
c. Higher residual magnetism
d. Higher permeability
Q. What rule describes the direction of current flow (+ to -) when lines of magnetic forcesurround a conductor?
a. Left hand rule
b. Right hand rule
c. Flux density rule
d. Reluctance rule
Q. The opposition that a ferromagnetic material shows to the establishment of a magneticfield is called:
a. Retentivity
b. Reluctance
c. Coercive force
d. Permeability
Q. The magnetism which remains in a piece of magnetisable material after the magnetising force has been removed is called the:
a. Tramp field
b. Residual field
c. Damped field
d. Permanent field
Q. A material with a narrower hysteresis loop has:
a. Higher permeability
b. Lower retentivity
c. Lower coercive force
d. All of the above
Q. The correct number of ampere-turns for a given test specimen is determined by:
a. Its length
b. The material and its diameter
c. Both the length and the material
d. Its diameter and length