ASNT LEVEL III STUDY GUIDE QUESTIONS AND
ANSWERS GRADED A+
✔✔HEAT CAPACITY - ✔✔Ability of a material or structure to store heat. The denser the
material generally will have higher heat capacity
✔✔CAPILLARY ACTION - ✔✔Tendency of liquids to penetrate or migrate into small
openings, such as cracks, pits. the positive force that causes movement of certain
liquids along narrow or tight passages.
✔✔CASTING DIE - ✔✔(1) casting used in a reusable metallic cavity (2) Casting
process where molten metal is forced under high pressure into the cavity of a metal
mold.
✔✔INVESTMENT CASTING - ✔✔Casting metal into a mold produced by surrounding
(investment : wax, plastic, frozen mercury) an expandable pattern with a refractory
slurry that sets at room temp after which the "investment" is removed.
✔✔CATHODE - ✔✔The negative electrode of an X-ray tube, the electrode from which
electrons are emitted
✔✔CEMENTITE - ✔✔hard brittle compound of iron and carbon known chemically as
iron carbide and found in steels and cast irons.
✔✔CENTRIFUGE TUBE - ✔✔Vial that holds liquids and has graduations to indicate the
concentration of solids that settle out of a known suspension volume.
✔✔CERTIFICATION - ✔✔written testimony that an individual has met the qualification
requirements of a specific practice or standard.
✔✔CHAPLET - ✔✔metal support used to hold a "core" in place on a mold.
✔✔CHARGE COUPLE DEVICE (CCD) - ✔✔solid state image sensors.
✔✔CHATTER - ✔✔in machining or grinding, vibration of tool, wheel or work piece
producing a wavy surface on the work.
✔✔CHILL - ✔✔metal insert embedded in the surface of a sand mold or core or placed
in a mold cavity to increase the cooling rate at that point.
✔✔CIRCUMFERENTIAL - ✔✔direction around the perimeter of a cylindrical surface.
✔✔CODE - ✔✔standard enacted or enforced as a law
, ✔✔COEFFICIENT OF THERMAL EXPANSION (CTE) - ✔✔rate of expansion or
contraction per unit of length, volume or area per degree of temp change between
specific lower or upper temp limits.
✔✔COERCIVE FORCE - ✔✔reverse external magnetic field intensity required to
reduce the test objects bulk magnetism to zero
✔✔ABSOLUTE COIL - ✔✔a coil that response to the electromagnetic properties of that
region of the test object within the magnetic field of the coil, without comparison to the
response of a second coil at a different location on the same material.
✔✔BOBBIN COIL - ✔✔cylindraically would absolute or differential probe useful for
inspecting the inside diameter or tubular products.
✔✔DIFFERENTIAL COIL - ✔✔two or more physically adjacent and mutually coupled
coils connected in series opposition such that the imbalance between them causes a
signal
✔✔COLT SHUT - ✔✔(1) casting discontinuity caused by two streams of semimolten
metal coming together withen a mold but failing to fuse. (2) a crack like discontinuity
caused by forging, where two surfaces of metal fold against each other without joining.
✔✔COLD WORKING - ✔✔permanent deformation produced by an external force in a
metal below its recrystallization temp.
✔✔COLLIMATOR - ✔✔in radiographic. A device for restricting the size, shape, and
direction of the irradiating beam
✔✔PENETRANT COMPARATOR - ✔✔(1) transparent plastic devise containing lines of
known lengths used to evaluate indication dimensions. (2) An aluminum block with
artificial cracks or special surface conditions to test different penetrants.
✔✔CONDUCTANCE - ✔✔(1) in leak testing, the flow characteristics of a tube, manifold
or leak path. (2) transmission of electric current through material
✔✔CONDUCTION - ✔✔heat transfer occurring when more energetic particles collide
with- and thus impart some of their heat energy to slower moving particles.
✔✔THERMAL CONDUCTIVITY - ✔✔material property defining the relative ability to
carry heat by conduction in a static temp gradient. differs in solids,liquids,vapors. it is
high for metals and lower for gasses.
✔✔CONTACT METHOD (ULTRASONIC TESTING) - ✔✔A ultrasonic transducer face
makes direct contact with the test object through a thin film or couplant.
ANSWERS GRADED A+
✔✔HEAT CAPACITY - ✔✔Ability of a material or structure to store heat. The denser the
material generally will have higher heat capacity
✔✔CAPILLARY ACTION - ✔✔Tendency of liquids to penetrate or migrate into small
openings, such as cracks, pits. the positive force that causes movement of certain
liquids along narrow or tight passages.
✔✔CASTING DIE - ✔✔(1) casting used in a reusable metallic cavity (2) Casting
process where molten metal is forced under high pressure into the cavity of a metal
mold.
✔✔INVESTMENT CASTING - ✔✔Casting metal into a mold produced by surrounding
(investment : wax, plastic, frozen mercury) an expandable pattern with a refractory
slurry that sets at room temp after which the "investment" is removed.
✔✔CATHODE - ✔✔The negative electrode of an X-ray tube, the electrode from which
electrons are emitted
✔✔CEMENTITE - ✔✔hard brittle compound of iron and carbon known chemically as
iron carbide and found in steels and cast irons.
✔✔CENTRIFUGE TUBE - ✔✔Vial that holds liquids and has graduations to indicate the
concentration of solids that settle out of a known suspension volume.
✔✔CERTIFICATION - ✔✔written testimony that an individual has met the qualification
requirements of a specific practice or standard.
✔✔CHAPLET - ✔✔metal support used to hold a "core" in place on a mold.
✔✔CHARGE COUPLE DEVICE (CCD) - ✔✔solid state image sensors.
✔✔CHATTER - ✔✔in machining or grinding, vibration of tool, wheel or work piece
producing a wavy surface on the work.
✔✔CHILL - ✔✔metal insert embedded in the surface of a sand mold or core or placed
in a mold cavity to increase the cooling rate at that point.
✔✔CIRCUMFERENTIAL - ✔✔direction around the perimeter of a cylindrical surface.
✔✔CODE - ✔✔standard enacted or enforced as a law
, ✔✔COEFFICIENT OF THERMAL EXPANSION (CTE) - ✔✔rate of expansion or
contraction per unit of length, volume or area per degree of temp change between
specific lower or upper temp limits.
✔✔COERCIVE FORCE - ✔✔reverse external magnetic field intensity required to
reduce the test objects bulk magnetism to zero
✔✔ABSOLUTE COIL - ✔✔a coil that response to the electromagnetic properties of that
region of the test object within the magnetic field of the coil, without comparison to the
response of a second coil at a different location on the same material.
✔✔BOBBIN COIL - ✔✔cylindraically would absolute or differential probe useful for
inspecting the inside diameter or tubular products.
✔✔DIFFERENTIAL COIL - ✔✔two or more physically adjacent and mutually coupled
coils connected in series opposition such that the imbalance between them causes a
signal
✔✔COLT SHUT - ✔✔(1) casting discontinuity caused by two streams of semimolten
metal coming together withen a mold but failing to fuse. (2) a crack like discontinuity
caused by forging, where two surfaces of metal fold against each other without joining.
✔✔COLD WORKING - ✔✔permanent deformation produced by an external force in a
metal below its recrystallization temp.
✔✔COLLIMATOR - ✔✔in radiographic. A device for restricting the size, shape, and
direction of the irradiating beam
✔✔PENETRANT COMPARATOR - ✔✔(1) transparent plastic devise containing lines of
known lengths used to evaluate indication dimensions. (2) An aluminum block with
artificial cracks or special surface conditions to test different penetrants.
✔✔CONDUCTANCE - ✔✔(1) in leak testing, the flow characteristics of a tube, manifold
or leak path. (2) transmission of electric current through material
✔✔CONDUCTION - ✔✔heat transfer occurring when more energetic particles collide
with- and thus impart some of their heat energy to slower moving particles.
✔✔THERMAL CONDUCTIVITY - ✔✔material property defining the relative ability to
carry heat by conduction in a static temp gradient. differs in solids,liquids,vapors. it is
high for metals and lower for gasses.
✔✔CONTACT METHOD (ULTRASONIC TESTING) - ✔✔A ultrasonic transducer face
makes direct contact with the test object through a thin film or couplant.
