Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. A leakage field is strongest when a discontinuity interrupts the magnetic flux lines atan angle of:
a. Zero degrees
b. 45 degrees
c. 90 degrees
d. 180 degrees
Q. Which of the following does not represent a limitation of magnetic particle testing?
a. The type of materials which may be effectively tested
b. The directionality of the magnetic field
c. The need for demagnetization
d. The ability to detect discontinuities filled with foreign material
Q. A discontinuity which is produced during solidification of the molten metal is called:
a. Inherent
b. Processing
c. Service
d. None of the above
Q. Pipe would be classified as what type of discontinuity?
a. Inherent
b. Processing
c. Service
d. None of the above
Q. A seam would be classified as what type of discontinuity?
a. Inherent
b. Processing
c. Service
d. None of the above
Q. A lamination in steel plate would be classified as what type of discontinuity?
a. Inherent
b. Processing
c. Service
d. None of the above
Q. An internal rupture caused by working steel at improper temperatures is called a:
a. Lap
b. Cold shut
c. Forging burst
d. Slag inclusion
Q. Cracks which are caused by alternating stresses above a critical level are called:
a. Stress corrosion cracks
b. Cycling cracks
c. Critical cracks
d. Fatigue cracks
Q. Cracks which are caused by a combination of tensile stress and corrosion are called:
a. Stress corrosion cracks
b. Cycling cracks
c. Critical cracks
d. Fatigue cracks
Q. Which of the following are ferromagnetic materials?
a. Aluminium, iron, copper
b. Iron, copper, nickel
c. Copper, aluminium, silver
d. Iron, cobalt, nickel
Q. The reverse magnetising force necessary to remove a residual magnetic field from atest piece after it has been magnetically saturated is called:
a. Hysteresis
b. Coercive force
c. Demagnetising flux
d. Reverse saturation
Q. Magnetic lines of force enter and leave a magnet at:
a. Saturation
b. L/D ratios of greater than 4 to 1
c. Flux concentration points
d. Poles
Q. The ease with which a magnetic field can be established in a test piece is called:
a. Reluctance
b. Retentivity
c. Permeability
d. Electromagnetism
Q. The ability of a material to remain magnetic after the magnetising force is removed iscalled:
a. Reluctance
b. Retentivity
c. Permeability
d. Electromagnetism
Q. A magnetic field which is contained completely within the test piece is called a:
a. Confined field
b. Longitudinal field
c. Circular field
d. Saturated field