Which of the following materials is considered nonferrous?
A. Copper alloys
B. High alloy steels
C. Tool steels
D. Ferritic stainless steels
1) - A
Materials that are strongly attracted to a magnet are called:
A. magnetized.
B. nonmagnetic.
C. ferromagnetic.
D. magnetic.
2) - C
Magnetic lines of force (magnetic fields) are oriented:
A. Parallel
B. At right angles
C. At a 45° angle
D. At random angles
3) - B
“Magnetizing flux” relates to:
A. the direction of current flow in an electromagnet.
B. the manner by which magnetism flows through space.
C. the lines of force associated with a magnetic field.
D. permanent magnets only.
4) - C
What does subjecting a part to a magnetic field that is constantly reversing in polarity and gradually diminishing in strength accomplish?
A. Demagnetizes the part.
B. Magnetizes the part.
C. Increases the residual magnetism.
D. Locates deep-lying discontinuities.
5) - A
What is circular magnetization used to detect?
A. Circumferential cracks
B. Longitudinal cracks
C. Cracks in cylindrical parts at right angles to the long axis of the part
D. Deep-lying discontinuities
6) - B
In which magnetizing method is the current passed directly through the part, thereby setting up a magnetic field at right angles to the current flow?
A. Longitudinal magnetization
B. Coil magnetization
C. Central conductor magnetization
D. Circular magnetization
7) - D
Which of the following is a major disadvantage of using prods?
A. The magnetic field may be applied in the wrong direction.
B. The inspection surface may be arc burned.
C. Magnetic saturation may occur.
D. Control of the amperage.
8) - B
What is it called when wet magnetic particles are applied to a part while the current is flowing?
A. Continuous method
B. Dry method
C. Residual method
D. Demagnetization method
9) - A
How is the inside diameter of a cylinder best magnetized?
A. By using a head shot.
B. By using prods at either end.
C. With a central conductor placed between contact heads.
D. With the cylinder placed crosswise in a solenoid.
10) - C
The amount of amperage used for MT using prods is based on the distance between the prods and the:
A. thickness of the part.
B. length of the prods.
C. diameter of the prods.
D. total length of the part.
11) - A
When is demagnetization of a part usually necessary?
A. If the part is made of stainless steel.
B. If the part is a nonferromagnetic steel.
C. If the part is high-carbon steel to be welded after inspection.
D. If the part is to be hardened by heat treatment after inspection.
12) - D
Which of the following is an advantage of the dry technique over the wet technique?
A. It is more sensitive for detecting fine surface cracks.
B. It is more capable of providing full surface coverage on irregularly shaped parts.
C. It is easier to use for field inspection with portable equipment.
D. It is faster when testing many small parts.
13) - C
When are fluorescent magnetic particles used in preference over visible magnetic particles?
A. When parts are big and bulky.
B. When working in the field.
C. If parts are for railroad applications.
D. To increase the speed and reliability of detecting very small discontinuities.
14) - D
What causes a leakage field in a steel bar?
A. Paint on the bar surface
B. A longitudinal crack
C. Reversal of the magnetic field
D. Hysteresis
15) - B
MT techniques are recognized as superior to liquid penetrant testing techniques when:
A. the surfaces of the test object are corroded.
B. the surface is anodized.
C. the parts are painted.
D. the part is made from austenitic steel.
16) - C
When using direct current, an indication is detected. What is the next logical step?
A. Reinspect using the surge method.
B. Demagnetize and apply powder.
C. Reinspect at higher amperage.
D. Reinspect using alternating current.
17) - D
What should a requirement to use MT on a part include?
A. A fabrication and service manual.
B. A statement on the drawing that requires MT.
C. The procedure to be used and acceptance criteria.
D. The method of test and service conditions.
18) - C
What is the name of the force that must be applied in the opposite direction to remove any remaining magnetism?
A. Coercive force
B. Demagnetizing flux
C. Reverse saturation
D. Direct force
19) - A
The best type of magnetizing current for the inspection of fatigue cracks is:
A. direct current.
B. alternating current.
C. half-wave rectified alternating current.
D. full-wave current.
20) - B
A star-shaped indication on a weld cover pass indicates:
A. Crater crack.
B. Cooling crack.
C. Slag inclusion.
D. Arc burn.
21) - A
For maximum sensitivity in MT of rough welds:
A. Wire brush the weld.
B. Use standard test weldments.
C. Coat the weld with lacquer.
D. Grind the weld bead smooth.
22) - A
Ferromagnetic materials are made up of small, polarized regions known as:
A. photons.
B. quarks.
C. electrons.
D. domains.
23) - D
Reapplication of magnetic particle suspension after current is applied is:
A. residual method.
B. continuous method.
C. magnetization method.
D. demagnetization method.
24) - A
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SNT-TC-1A (2024)89
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ANSI ASNT CP-189 (2024)43
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Acoustic Emission Testing10
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Electromagnetic Testing28
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Leak Testing18
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Liquid Penetrant Testing30
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Magnetic Flux Leakage21
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Magnetic Particle Testing29
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Neutron Radiography30
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Radiographic Testing27
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Thermal/Infrared21
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Ultrasonic Testing33
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Visual Testing17
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MATERIALS, FABRICATION, AND PRODUCT TECHNOLOGY183
