Volume 2-UR Flashcards
which property of metal do you not want to increase through alloying? (A) Strength (B) Elasticity (C) Hardness (D) Toughness
B. elasticity
the physical structure of metal is in what form?
crystalline
the process of improving a metal’s characteristics by altering its grain structure is known as ….
heat-treating
what is a reaction to an applied force called?
Strain
The term for a metal’s ability to absorb energy without fracturing is ….
toughness
Which metallurgical numbering system uses the identification of steel as its basis?
Society of Automotive Engineers
The term NDI indication refers to …
evidence resulting from a rocess
which of the following is not an inherent discontinuity? (A) Lap (B) Pipe (C) Porosity (D) Shrinkage
A. Lap
A secondary processing defect would not be cause by … (A) heat-treating (B) machining (C) grinding (D) casting
D. casting
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
B. progression rates will vary
What form of corrosion is indicated by a white or gray powdery deposit on the surface of a part?
pitting
Stress corrosion is caused by …
tensile stress and corrosion
The two basic processes used to weld parts together are …
adhesion and fusion
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
C. DOD JOAP office manager
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
B. hazardous residues
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
D. Viscous Oils
You ensure that all penetrant developer residue is removed from a part because the penetrant ….
may cause corrosion
which of the following is not an action of an alkaline cleaner? (A) Wetting (B) Dissolving (C) Penetrating (D) Emulsifying
B. Dissolving
One characteristic of a detergent cleaner is that it must be …
noncorrosive
where would you find pre-cleaning procedures in a -36 inspection technical order?
preparation of part
What should you do with steel parts after post cleaning with a solvent?
Treat them with light oil
NDI techniques are classified as …
instructions
Which form do you sue to submit your new NDI technique for review and publication?
AFTO Form 242
Who validates new NDI techniques and acts to incorporate them into applicable technical manuals?
ALC NDI program managers
What must be accomplished on a stereo zoom microscope whenever operators change?
initial focusing
What is engraved on stereo zoom microscope lenses, eyepieces, and the zoom control knob?
initial magnification ratings
What instrument is used to transmit light in a curved path?
fiberscope
what do you use to clean optical lenses that have protective coating?
water
Eyepieces for the stereo zoom microscope and stored …
on the power body
penetrants need to have good solvent properties in order to …
hold dyes in solution
What generates forces to draw a penetrant into fine cracks?
capillary action
What is a Type I penetrant process?
Fluorescent dye materials
What is a Method C penetrant inspection?
solvent removable
what is the term for suing family groups of penetrant materials from the same manufacturer?
System concept
What is the concentration range of spray remover-to-water by volume in hydrophilic penetrant systems?
1.0 to 5.0 percent
In the hydrophilic process, the water pressure range for the rinse step after remover application is 10 to
35 psi
What should you wear in case you mistakenly press the penetrant spray nozzle with the opening pointing back at you?
chemical goggles
What is the difference between small, medium, and large fluorescent penetrant inspection units?
the size of the parts they can accommodate
A black light bulb can reach an operating temperature of …
750 degrees Fahrenheit
How much excess surface penetrant is removed during the pre-rinse step in hydrophilic processing?
over 80 percent
at what distance and angle do you spray water at a surface to remove penetrant during hydrophilic processing?
12 inches at 45 degrees
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
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
Penetrant materials not centrally procured will be accepted and used when …
the system performance test and material test report are satisfactory
What is the maximum interval for performing in-use penetrant materials testing?
Monthly
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
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
Which step in the hydrophilic inspection process requires that agitation not be excessive?
Removal by immersion
What is the unit of measure of current?
Ampere
What is one line of magnetic force called?
Maxwell
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
The ease with which a metal can be magnetized is known as ____________.
permeability
What is the term for the amount of magnetizing force necessary to reduce flux density to zero in a saturated part?
Coercive force
Magnetic particle inspection is possible because iron particles are attracted to _______ ______.
leakage fields
Dry particles are primarily used when inspecting for __________ _______
subsurface defects
In which method are magnetic particles applied to a part after the magnetizing current is turned off?
wet or dry residual
Which magnetic field is produced with a head shot?
circular field
A portable yoke produces what type of magnetic field?
longitudinal field
When inducing circular magnetization the recommended current value is?
300 to 800 amperes per inch
The generally accepted rule for current values when using a central bar conductor (CBC) is ___ __ ____ ______ ___ ____.
100 to 1000 amperes per inch
When inspecting for fine cracks, coating shall be removed if the thickness exceeds …
0.003 inch
Which type of magnetic field is easily detected with a field indicator?
longitudinal field
Indications that are not significant are referred to as being …
nonrelevant
What feature do most stationary inspection units have to demagnetize parts?
30-point step-down
which magnetic particle equipment requires the operator to depress a foot switch?
stationary
when demagnetizing, how far do you lift DA-200 away from a large part before turning the probe off?
2 feet
how far must rubber matting extend beyond the ends of stationary magnetic inspection equipment?
24 inches
how often must you conduct a quick break test on your stationary equipment?
every 90 calendar days
How often must you perform deadweight checks on your portable magnetic inspection equipment?
every 90 calendar days
When performing an in-use bath check, what is the acceptable concentration range of wet fluorescent particles?
.1 to .4ml/100ml
