MT Level III Questions answers full mock examination
Practice this full mock examination for the ASNT NDT Level III mock examination. The exam covers full 2 hours MT level III exam with similar difficulty to the actual examination.
Good luck.
MT level III sample questions with answers.
Question 1:
In Magnetic Particle Testing (MT), the primary purpose of using a circular magnetic field is to:
A. Detect longitudinal defects
B. Detect transverse defects
C. Detect both longitudinal and transverse defects
D. Reduce the amount of magnetizing current needed
Answer: A
Question 2:
Which of the following particle types is most commonly used for magnetic particle testing?
A. Fluorescent
B. Metallic
C. Colloidal
D. Radioactive
Answer: A
Question 3:
The most commonly used method for demagnetizing a ferromagnetic test specimen is:
A. By heating it above its Curie temperature
B. By applying a strong magnetic field in the opposite direction
C. By using an alternating current (AC) demagnetizing coil
D. By placing it in an area with zero magnetic field
Answer: C
Question 4:
What is the main advantage of using a Wet Horizontal Magnetic Particle Testing (Wet MPI) method over a Dry MPI method?
A. More sensitive to small discontinuities
B. Lower equipment cost
C. Faster inspection process
D. Easier to apply on large surfaces
Answer: A
Question 5:
How often should an MT yoke be checked for proper lifting capacity during daily operation?
A. Every 4 hours
B. Every 8 hours
C. Once per shift
D. At the beginning of each workday
Answer: D
Question 6:
Which of the following discontinuities is least likely to be detected by Magnetic Particle Testing?
A. Lack of fusion
B. Inclusions
C. Internal porosity
D. Surface cracks
Answer: C
Question 7:
In Magnetic Particle Testing, the term “background” refers to:
A. The surface of the test specimen
B. The area surrounding the test specimen
C. The magnetic field intensity
D. The non-magnetic particles in the inspection medium
Answer: A
Question 8:
Magnetic Particle Testing is most effective on which type of materials?
A. Ferromagnetic materials
B. Non-magnetic materials
C. Diamagnetic materials
D. Paramagnetic materials
Answer: A
Question 9:
What is the purpose of a “field indicator” in Magnetic Particle Testing?
A. To measure the strength of the magnetic field
B. To indicate the presence of a magnetic field
C. To show the direction of the magnetic field
D. To control the magnetic field intensity
Answer: B
Question 10:
Which of the following factors could cause false indications in Magnetic Particle Testing?
A. Residual magnetism
B. Excessive particle concentration
C. Insufficient particle concentration
D. Both A and B
Answer: D
