MT III Question 3
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1.
Which is a recommended practice when dealing with electrical components of MT equipment?
2.
The MT examination of ferromagnetic weldments for surface cracks is generally:
3.
Hot tears in castings occur:
4.
Bursts in wrought products are internal ruptures caused by:
5.
A large, heat-treated, high-alloy steel shaft is most effectively demagnetized using:
6.
The recommended overlap of inspection areas when using yokes or prods is at least:
7.
The 'continuous' wet method requires that the magnetizing current be applied:
8.
Demagnetization using direct current is accomplished by:
9.
A central conductor made of a nonmagnetic, highly conductive material (e.g., copper) is used because it:
10.
A high-retentivity material is well suited to the:
11.
Which indication would normally be classified as nonrelevant?
12.
Hazards associated with ultraviolet radiation inspection areas include:
13.
Which activity is NOT within the normal scope of an NDT Level II per SNT-TC-1A?
14.
A disadvantage of the prod technique is the possibility of:
15.
For the low-fill-factor coil technique, the cross-sectional area of the coil opening compared to the part is:
16.
A written NDT procedure is required primarily to ensure:
17.
Leakage-field pickup coils used in flux leakage equipment are either air-cored or use a small ____ core.
18.
Fluorescent magnetic particle indications are best viewed under:
19.
Per SNT-TC-1A, recertification may be based on:
20.
Brazing and soldering differ from welding in that the base metal:
21.
Black (visible) magnetic particles are most useful on:
22.
The pie gage (octagonal flaw indicator) is used to:
23.
For a part with a low length-to-diameter (L/D) ratio magnetized in a coil, the required ampere-turns:
24.
A lap in a rolled or forged product is caused by:
25.
The oil (vehicle) used to suspend wet magnetic particles should have a viscosity that is:
26.
In the continuous wet method, the bath is applied and magnetizing current is:
27.
A 'soft' magnetic material is characterized by:
28.
If a discontinuity lies parallel to BOTH applied fields in a two-direction examination, the inspector should:
29.
The most sensitive routine MT technique for fine surface discontinuities is the:
30.
Reduced weight and size of stationary or mobile equipment can be achieved by:
31.
A Level III, per SNT-TC-1A, should be capable of:
32.
Per typical acceptance criteria, a 'rounded indication' is one whose length is:
33.
Documentation of an MT examination should include the magnetizing method, current, particles, lighting, results, and the:
34.
Porosity in a weld is caused by:
35.
Verification of system performance, field meters, and light meters under ASTM E1444 is required at intervals of at least:
36.
Overheating or arc burns from prods are most likely on:
37.
Three-phase full-wave rectified current most closely approximates:
38.
Magnetic particle indications should be evaluated:
39.
For multidirectional magnetization to be valid, evidence of adequate fields in all directions must be shown using:
40.
An AC yoke should be able to lift a steel weight of at least:
41.
The skin effect of alternating current means that as frequency increases, the field penetration:
42.
UV-A lamps should be connected to a steady (regulated) voltage source in order to:
43.
Under SNT-TC-1A, the document that an employer must prepare and maintain to control certification is the:
44.
Indications are formed only when a discontinuity:
45.
Which welding process is capable of very high intensity and rate of heat transfer?
46.
Shims placed under a part during examination help confirm that:
47.
The intensity of a magnetic flux leakage field at a discontinuity is most strongly affected by the discontinuity's:
48.
Background fluorescence of the carrier fluid should be:
49.
The principal alloying elements of brass are:
50.
A magnetic particle build-up (indication) from a discontinuity is strongest when the discontinuity is oriented:
51.
In a circularly magnetized ferromagnetic bar, the lines of flux:
52.
The areas on a magnetized part from which the magnetic field is leaving or returning into the part are called:
53.
Acceptable residual field levels are typically verified to be below:
54.
Permanent magnets (bar/horseshoe) for field magnetization are limited because they:
55.
In ASME Section V Article 7, relevant linear indications are evaluated against length limits defined in the:
56.
Which UV band is the most hazardous, causing severe skin and eye damage after short exposure?
57.
When comparing a hollow conductor to a solid conductor of the same diameter and current, the external surface field is:
58.
Failure to maintain a uniform level/concentration of particles in a wet bath will cause:
59.
The most sensitive magnetic particle technique for detecting fine surface fatigue cracks is:
60.
Indications that are held mechanically or by gravity in surface irregularities (not by leakage fields) are termed:
61.
Specifications are contractual documents used by engineering, procurement, and inspection to:
62.
Dry magnetic particles are generally preferred for:
63.
Parts should be precleaned before being placed in an oil bath primarily to:
64.
Which of the following is a recommendation when dealing with UV (ultraviolet) sources?
65.
In the presence of oil (petroleum) vehicles, the principal electrical hazard is:
66.
Magnetic saturation of a part occurs when:
67.
A surface crack lying at 90 degrees to the magnetic flux will produce:
68.
Copper braid or lead pads on contact heads are used to:
69.
The direction of a circular field around a straight current-carrying conductor follows the:
70.
A circular field is best for detecting discontinuities that are:
71.
The Ketos ring (tool steel ring) test provides information primarily about the:
72.
Fluorescence in a darkened booth can offer effective contrast ratios as high as about:
73.
The depth of subsurface detectability by MT depends mainly on flaw size, depth, and the:
74.
The magnetic field produced by the single-leg yoke technique is:
75.
Compared with eddy current testing, an advantage of magnetic flux leakage methods is:
76.
Magnetic particle inspection is NOT a reliable method for detecting:
77.
An energized coil placed around a part produces:
78.
ASTM E1444 requires verification of system performance using a tool steel ring standard at intervals of:
79.
Magnetic rubber inspection is particularly useful for:
80.
A high flash point is desirable in the petroleum vehicle of a wet bath because it:
81.
The permeability of a material describes the:
82.
For thorough demagnetization of large or thick parts, the preferred current is:
83.
It is not recommended to reclaim and reuse dry magnetic particles because they:
84.
The most common method of applying magnetizing current with a portable field unit is with:
85.
Magnetic lines of force:
86.
An indication that reappears after being wiped away and re-magnetized is most likely:
87.
Quenching followed by tempering of steel is performed to:
88.
A 'system performance' or 'system effectiveness' check verifies the combined performance of:
89.
The recommended way to confirm that a part is adequately demagnetized is to:
90.
When water is used as the particle carrier, corrosion inhibitors and wetting agents are added to: