a surface can be considered smooth if it’s irregularities are not more than ______ wavelength.

a narrowband transducer has which of the following characteristics?

the _______ is the characteristic of a Crystal to generate electrical charges when subjected to mechanical vibrations, and conversely to generate mechanical vibrations when subjected to electrical pulses.

_______ are the frequencies at multiples above the fundamental resonance frequency

which of the following sound wave modes travels fastest in aluminum?

what is the longitudinal velocity of aluminum?

the ability of a transducer to detect echoes from small discontinuities is called ________.

the purpose of the IIW block is to detmine

which waves travel near the surface, within one wavelength, of a solid material and exhibits a completely different wave motion than that of a longitudinal or shear waves

damping material, housed in the transducer, is designed to _______.

what is the shear velocity of aluminum?

which of the following is not an example of a non-relevant indication?

When testing a 30mm diameter, 500mm long shaft from the flat end of the shaft using longitudinal waves from a 20mm diameter, 2MHz transducer, numerous signals are seen on the screen after 500mm. These are:

the ________ is the depth of material immediately beneath the crystal surface from which no echos can be displayed.

a stress corrosion crack is a defect of:

a longitudinal wave generating transducer with have a given near field in steel. If in water, the near field for this probe will be:

a reflector plate is used in the testing of _______ to aid in sending the sound through the material twice in an attempt to double the sensitivity to delamination and disbanded regions.

______ removed shrinkage discontinuities (pipe) near the top of the ingot casting.

when the surface of an air-filled crack within a steel plate is smooth and under compressive force, part of the sound beam will pass through the interface, leaving the discontinuity undetected. These types of discontinuities are referred to as:

the smallest distance between two points on an elastic wave where the particles are in the same state of motion is the:

what conditions cause a casting to be difficult to examine using ultrasonic testing?

waves used in ultrasonic testing of materials are ______ in nature.

Rayleigh (surface) waves can be used in steel to penetrate up to:

a term less often used, but inherently more correct than “calibration” is:

in a standing wave, the ___ is the point of no particle displacement

Which statement below best describes a suitable minimum scanning distance for angle beam testing?

how do you identify a 4140 steel, distance-amplitude block that is 5.75” long with a 0.75” long x 1/8” diameter FBH?

which of the following reductions in full screen height represents a 6 dB drop

what is the longitudinal velocity of steel?

a generally smooth indentation on a cast surface resulting from the meeting of two streams of metal coming from different directions and failing to fuse is called a:

the ultrasonic device delivers a digital readout of the thickness value and recent advancements include an A-scan presentation:

_______ is an advanced ultrasonic variation of the pitch-catch technique using two transducers

______ is the process of deciding as to the severity of the condition after an indication has been interpreted.

the ______ presentation produces a two-dimensional display of the cross-sectional plane (side) view through the test object.

for best results detecting a defect that may be irregularly shaped and slightly off perpendicular to the beam, the wavelength used should be

depth resolution has a significance when it is important to identify and quantify reflectors close together at or near boundary surfaces. The ASTM 317 resolution block is designed to:

what is the shear velocity in steel?

the _______ technique uses two piezoelectric elements, one that transmits ultrasound and one that receives it.

________ is a phenomenon that can occur when performing straight beam tests, especially on materials that may be subject to excessive thinning from internal erosion or corrosion.

_____ and _____ will significantly determine the velocity of sound within a material.

which of the following is a non-contact transducer that is used in the ultrasonic testing method?

which of the following is not considered a necessary requirement when selecting a couplant?

which of the following would not be considered an advantage of ultrasonic testing?

cold shuts are _______ disctontinuities.

The display of a misleading ultrasonic reflection from a previously transmitted pulse, due to the use of excessive pulse. Repetition frequency is referred to as.

course-grain materials have a grain structure that requires the use of transducers with high penetrating power. which frequency, 2.25MHz or 5MHz, would have the best penetrating power and why?

in which of the following welding processes is filler metal never added?

__________ are used extensively for high-speed inspection of thin-wall tubing and plates.

A standard groove weld should be scanned a minimum of ____ directions when applying ultrasonic angle beam testing

in weld inspection, transverse cracks are best located by:

in immersion testing you would normally position the:

a 5-point DAC curve is built using a set of 2.5mm distance-amplitude reference blocks. Which of the following can be assumed?

what is the following equations used to find?

at a solid to free boundary (air), an obliquely incident longitudinal wave from a solid can result in, at most:

the main contribution to loss of sound pressure of a beam incident incident on a rough surface is provided by:

the bending of a sound wave upon entering a new medium is explained by:

which of the following factors can have a negative influence on some nondestructive testing?

what are the 8 sections that outline the written instruction? (one word each)

the IOW beam profile reference block is used for:

_______ is a general phenomenon that uses a spherical wave front from an indication to help measure the height of a discontinuity

_______ are used extensively for high-speed inspection of thin wall tubing and plates.

_______ is used to compensate for a drop in the amplitude of signals reflected by a discontinuity deep within a test object

which of the following information can generally be determined with basic trigonometry calculations?

what calibrations are required when performing automated corrosion inspection of in-service propane bullets?

A high acoustic impedance ratio will result in

there are two important regions that make up the sound beam, they are:

in general, the result of two waves interacting on each other can be found by:

the distance at which sound travels in a material, divided by the time it took to travel that distance is called:

At a metal-air interface, there is virtually ____% reflection of sound.

what formula is used to calculate the near field of a transducer?

scanning speed is dictated by the referencing code section. most standards recommend a maximum scanning speed of:

the ultrasonic range is described as sound waves with higher frequencies than humans can hear. this range starts at:

a discontinuity signal is maximized on the display screen at 20% FSH. calculate the dB needed to increase the signal to 100% FSH

received signals on the display screen deemed to be not from discontinuities, rather from electrical interference, mode conversion, geometry, etc., are called a:

a discontinuity with size, shape, orientation, or location, that makes it detrimental to useful service of the part is called a:

which of the following techniques is best to detect discontinuities perpendicular to the test surface?

_______ can be used to focus the sound beam in at a desired angle or depth in the test object.

small diameter round bar stock is ultrasonically inspected the best using the:

what is the following formula used to find?

at the second critical angle, there is ________ refracted wave remaining in the test object.

reference or calibration standards are used in ultrasonic testing to:

surface roughness only affects reflectivity if greater than ____ of a wavelength

the internet institute of welding (IIW) reference block is capable of:

lamb waves have an infinite number of modes that the wave may attain, dependent on the following factor:

in the ultrasonic flaw detector, the sweep circuit ________.

a 5 step wedge block can be used to establish _______ for an ultrasonic straight beam examination.

how do you identify a 6160 aluminum, distance amplitude block that is 25mm long, including a 19mm long x 2mm diameter FBH.

What type of wave modes are most sensitive to finger damping and surface contaminants?

what performance check is completed to confirm linearity of the gain control over the entire vertical scale of the display screen?

in ultrasonic testing, a piezoelectric material is used to:

the range control, on the ultrasonic testing instrument can

Shear waves can detect discontinuities about ____ the size when compared to longitudinal waves.

a 5-point DAC curve is built using a set of 2mm distance-amplitude reference blocks. During testing, a response from a discontinuity peaks below the DAC curve. which of the following is correct?

the ________ permits slabs and billets to be reduced into plates, and if the process is continued, the plate can be made into sheets.

The velocity of shear waves are roughly _____ that of longitudinal waves in most materials.

what are the main causes of attenuation in a material

which of the following ultrasonic techniques positions pairs of ultrasonic transducers together

the maximum pressure intensity of a sound beam is

the process by which a sound wave of a given mode of propagation is caused to generate other wave modes of propagation by refraction or reflection is called:

which type of discontinuity could be detected using ultrasonic angle beam testing?