ASNT NDT Magnetic Testing MT level III Questions answers quiz

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

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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?

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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

Jiten Karmakar is an NDT Specialist, holding ASNT NDT Level III and ISO 9712 NDT Level III Qualifications. He is having vast hands-on practical and theoretical experience with all major NDT Methods and technique.