In immersion testing using the angle-beam technique, the specimen front-surface indication will be

When testing a spot weld with a sound beam that is the same size as the weld nugget, the CRT pattern from a good spot weld will show:

A general rule of thumb in determining the correct water distance to use in immersion testing is that the water distance should be:

When using the formula a = w (sin α) to determine a discontinuity’s physical location, the transducer wedge sound travel distance must be first determined before any calculations can be made as to discontinuity location.

Direct reading ultrasonic calculators can be used to locate discontinuities in plate when:

Which of the following materials is most likely to produce the greatest amount of sound attenuation over a given distance?

A gross check of plate or sheet consists of marking off a grid pattern on the material, either real or imaginary, and then using each grid square using:

In contact testing, shear waves may be produced in a test specimen by:

The first critical incident angle for longitudinal waves is the point at which

Loss of back-surface reflection is evidence that sound is not being returned to the:

An ultrasonic instrument operator can control the number of cycles of sound energy transmitted into a test specimen by adjusting pulse length. A short pulse length results in: (Choose two)

The acoustical impedance of an ideal couplant

Wetting agents are sometimes added to couplants to:

Large diameter, single crystal transducers are generally:

Angle-beam transducers are used to:

Skip distance will increase with:

Wave propagation in a material as the result of sound absorption and scattering is known as:

The velocity of shear waves is:

A major limitation of using a low test frequency is:

The length of the region near the face of the search unit where the intensity fluctuates depends on the:

The most commonly used method of producing shear waves in a test part when inspecting by the immersion method is:

The type of display that never shows the entrance surface reflections is:

The ultrasonic testing technique that uses two search units is the

Low frequency sound waves are not generally used to test thin materials because of

When using two separate transducers (one a transmitter, the other a receiver), the most efficient combination would be a:

In immersion testing, the accessory equipment to which the search cable and the transducer are attached is called a:

In general, discontinuities in wrought products tend to be oriented

The formula used to determine the angle of beam divergence of a quartz crystal is:

The resolving power of a transducer is directly proportional to its:

Thin sheet may be inspected with the ultrasonic wave directed normal to the surface by observing:

A diagram in which the entire circuit stage or sections are shown by geometric figures and the path of the signal or energy by lines and/or arrows is called a:

. A hole produced during the solidification of metal due to escaping gases is called:

Properties of shear or transverse waves used for ultrasonic testing include:

One of the most common applications of ultrasonic tests employing shear waves is for the:

. Significant errors in ultrasonic thickness measurement can occur if:

A testing technique in which the crystal or transducer is parallel to the test surface and ultrasonic waves enter the material being tested in a direction perpendicular to the test surface is:

The distance from a given point on an ultrasonic wave to the next corresponding point is referred to as:

The angle formed by an ultrasonic wave as it enters a medium of different velocity than the one from which it came and a line drawn perpendicular to the interface between the two media is called the angle of:

A primary purpose of a reference standard is:

. In an immersion test of a piece of steel or aluminum, the water distance appears on the display as a fairly wide space between the initial pulse and the front surface reflection of: