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Volume 2-UR Flashcards

1
Q

which property of metal do you not want to increase through alloying? (A) Strength (B) Elasticity (C) Hardness (D) Toughness

A

B. elasticity

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2
Q

the physical structure of metal is in what form?

A

crystalline

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3
Q

the process of improving a metal’s characteristics by altering its grain structure is known as ….

A

heat-treating

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4
Q

what is a reaction to an applied force called?

A

Strain

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5
Q

The term for a metal’s ability to absorb energy without fracturing is ….

A

toughness

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6
Q

Which metallurgical numbering system uses the identification of steel as its basis?

A

Society of Automotive Engineers

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7
Q

The term NDI indication refers to …

A

evidence resulting from a rocess

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8
Q

which of the following is not an inherent discontinuity? (A) Lap (B) Pipe (C) Porosity (D) Shrinkage

A

A. Lap

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9
Q

A secondary processing defect would not be cause by … (A) heat-treating (B) machining (C) grinding (D) casting

A

D. casting

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10
Q

Which statement is most accurate regarding fatigue crack progression? (A) progression causes stress (B) Progression rates will vary (C) Progression is usually slow (D) Progression is instantaneous

A

B. progression rates will vary

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11
Q

What form of corrosion is indicated by a white or gray powdery deposit on the surface of a part?

A

pitting

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12
Q

Stress corrosion is caused by …

A

tensile stress and corrosion

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13
Q

The two basic processes used to weld parts together are …

A

adhesion and fusion

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14
Q

Which of the following is not listed as being linked in the probability of detection (POD) evaluation process? (A) Aircraft design engineers (B) NDI flight line technicians (C) DOD JOAP office manager (D) AF structural integrity engineers

A

C. DOD JOAP office manager

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15
Q

Which of the following is not a result of improper part preparation for NDI? (A) harm to the part (B) hazardous residues (C) hidden critical defects (D) Contaminated NDI materials

A

B. hazardous residues

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16
Q 
which condition is not an example of a tightly held soil?
(A) partially burned petroleum products
(B) residue from evaporated fuel
(C) Dry film lubricants
(D) Viscous oils
A

D. Viscous Oils

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17
Q

You ensure that all penetrant developer residue is removed from a part because the penetrant ….

A

may cause corrosion

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18
Q 
which of the following is not an action of an alkaline cleaner?
(A) Wetting
(B) Dissolving
(C) Penetrating
(D) Emulsifying
A

B. Dissolving

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19
Q

One characteristic of a detergent cleaner is that it must be …

A

noncorrosive

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20
Q

where would you find pre-cleaning procedures in a -36 inspection technical order?

A

preparation of part

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21
Q

What should you do with steel parts after post cleaning with a solvent?

A

Treat them with light oil

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22
Q

NDI techniques are classified as …

A

instructions

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23
Q

Which form do you sue to submit your new NDI technique for review and publication?

A

AFTO Form 242

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24
Q

Who validates new NDI techniques and acts to incorporate them into applicable technical manuals?

A

ALC NDI program managers

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25
What must be accomplished on a stereo zoom microscope whenever operators change?
initial focusing
26
What is engraved on stereo zoom microscope lenses, eyepieces, and the zoom control knob?
initial magnification ratings
27
What instrument is used to transmit light in a curved path?
fiberscope
28
what do you use to clean optical lenses that have protective coating?
water
29
Eyepieces for the stereo zoom microscope and stored ...
on the power body
30
penetrants need to have good solvent properties in order to ...
hold dyes in solution
31
What generates forces to draw a penetrant into fine cracks?
capillary action
32
What is a Type I penetrant process?
Fluorescent dye materials
33
What is a Method C penetrant inspection?
solvent removable
34
what is the term for suing family groups of penetrant materials from the same manufacturer?
System concept
35
What is the concentration range of spray remover-to-water by volume in hydrophilic penetrant systems?
1.0 to 5.0 percent
36
In the hydrophilic process, the water pressure range for the rinse step after remover application is 10 to
35 psi
37
What should you wear in case you mistakenly press the penetrant spray nozzle with the opening pointing back at you?
chemical goggles
38
What is the difference between small, medium, and large fluorescent penetrant inspection units?
the size of the parts they can accommodate
39
A black light bulb can reach an operating temperature of ...
750 degrees Fahrenheit
40
How much excess surface penetrant is removed during the pre-rinse step in hydrophilic processing?
over 80 percent
41
at what distance and angle do you spray water at a surface to remove penetrant during hydrophilic processing?
12 inches at 45 degrees
42
What must you do before applying non-aqueous developer? (A) vigorously sake the can (B) Stir the developer solution (C) check the developer for clumping (D) verify the developer concentration level
A.Vigorously shake the can
43
Which of the following is considered a defect? (A) a detrimental relevant indication (B) A nondetrimental relevant indication (C) A detrimental nonrelevant indication (D) A nondetrimental nonrelevant indication
A. a detrimental relevant indication
44
Penetrant materials not centrally procured will be accepted and used when ...
the system performance test and material test report are satisfactory
45
What is the maximum interval for performing in-use penetrant materials testing?
Monthly
46
``` Which test is not a method of testing initial concentrations of hydrophilic removers? (A) Brightness test (B) Colorimetry test (C) Refractometer Test (D) Specific Gravity test ```
A. Brightness test
47
When checking in-use remover performance, how long and at what angle do you let test panels dwell with penetrant?
10 minutes at 60 degrees
48
Which step in the hydrophilic inspection process requires that agitation not be excessive?
Removal by immersion
49
What is the unit of measure of current?
Ampere
50
What is one line of magnetic force called?
Maxwell
51
What do you call the number of lines of magnetic force per square centimeter in a plane perpendicular to the direction of the magnetic field?
Flux density
52
The ease with which a metal can be magnetized is known as ____________.
permeability
53
What is the term for the amount of magnetizing force necessary to reduce flux density to zero in a saturated part?
Coercive force
54
Magnetic particle inspection is possible because iron particles are attracted to _______ ______.
leakage fields
55
Dry particles are primarily used when inspecting for __________ _______
subsurface defects
56
In which method are magnetic particles applied to a part after the magnetizing current is turned off?
wet or dry residual
57
Which magnetic field is produced with a head shot?
circular field
58
A portable yoke produces what type of magnetic field?
longitudinal field
59
When inducing circular magnetization the recommended current value is?
300 to 800 amperes per inch
60
The generally accepted rule for current values when using a central bar conductor (CBC) is ___ __ ____ ______ ___ ____.
100 to 1000 amperes per inch
61
When inspecting for fine cracks, coating shall be removed if the thickness exceeds ...
0.003 inch
62
Which type of magnetic field is easily detected with a field indicator?
longitudinal field
63
Indications that are not significant are referred to as being ...
nonrelevant
64
What feature do most stationary inspection units have to demagnetize parts?
30-point step-down
65
which magnetic particle equipment requires the operator to depress a foot switch?
stationary
66
when demagnetizing, how far do you lift DA-200 away from a large part before turning the probe off?
2 feet
67
how far must rubber matting extend beyond the ends of stationary magnetic inspection equipment?
24 inches
68
how often must you conduct a quick break test on your stationary equipment?
every 90 calendar days
69
How often must you perform deadweight checks on your portable magnetic inspection equipment?
every 90 calendar days
70
When performing an in-use bath check, what is the acceptable concentration range of wet fluorescent particles?
.1 to .4ml/100ml

ndi (13 decks)

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