Another name for a compressional wave is

A material used between the face of a search unit and test surface to permit or improve the transmission of ultrasonic vibrations from the search unit to the material being tested is called:

The amount of beam divergence from a crystal is primarily dependent on the:

When an ultrasonic beam passes through the interface between two dissimilar materials at an angle, a new angle of sound travel takes place in the second material due to:

The boundary between two different materials which are in contact with each other is called

All other factors being equal, which of the following modes of vibration has the greatest velocity

A piezoelectric material can

???What is the DEPTH and PROJECTION(surface) distance of the defect for the following data: Plate thickness = 25 mm, probe angle = 60 deg. Beam path distance = 40 mm Skip = 0 - 1 skip.

High frequency probes will produce

Attenuation is the loss of the ultrasonic wave energy during the course of propagation in the material due to:

In contact testing, the entry surface indication is sometimes referred to as:

Metal blocks, which contain one or more drilled holes to simulate discontinuities, are called:

A test method in which the parts to be inspected are placed in a water bath or some other liquid couplant is called

A plan view display or recording of a part under examination is called

If a discontinuity is oriented at an angle other than 90 degrees to the sound beam, the results may be a:

The thickness of the crystal is related to frequency by

When the incident angle is chosen to be between the first and second critical angles, the ultrasonic wave mode within the part will be a:

???When the PZT crystal thickness is 0.9 mm, the frequency is (VpZT = 4000m/s)

The thickness range of UT resonance thickness gages can be increased by:

A typical application of shear waves in ultrasonic

Generation of ultrasound can be done with the following technology

Which of the following transducer materials makes the best transmitter:

Some information on the shape of a flaw may be given by:

Rough surfaces cause the echo amplitude from discontinuities within the part to:

The dB difference between 20% and 80% echo is

Sensitivity is defined as

The temperature at which the crystal losses its piezo electric nature is

Figure illustrates an immersion test of a 76 mm (3 in.) block of aluminum with a discontinuity located 51 mm (2 in.) below the surface. The display pattern is shown also. What does indication A represent? Assume no sweep delay is used.

In the figure, indication B represents the:

In the figure, indication C represents the:

In the figure, indication D represents the:

In the figure, the distance between indications A and B represents:

On an A-scan display, the “dead zone” refers to

In ultrasonic testing, the time duration of the transmitted pulse is referred to as:

In a plate, skip distance can be calculated from which of the following formulas where (t = plate thickness, θ = angle of sound beam refraction, and V = sound velocity):

The difference between a compression and shear wave is

The shortest wavelength pulse is produced by a frequency of

In contact testing, the entry surface indication is sometimes referred to as:

Of the transducer materials listed below, the most efficient receiver is:

The advantage of immersion testing include