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

1. Which of the following may result in a long narrow rod if the beam divergence results
in a reflection from a side of the test piece before the sound wave reaches the back
surface?

The ability to separate echos from reflectors close together in depth is called:

2. Acoustic energy propagates in different modes. Which of the following represent a
mode?

3. Which of the following would be considered application(s) of ultrasonic testing?

Greater depth of penetration in coarse grained material may be achieved using:

Lower frequency transducers produce:

4. Waves whose particle displacement is parallel to the direction of propagation are
called:

Sound waves with particle displacement transverse to the direction of wave travel are
known as:

Spurious indications might be caused by which of the following?

The portion of a test piece which is represented by the CRT screen area from zero to
the rightmost edge of the initial pulse is called:

The only sound waves which travel in liquids are:

A significant limitation of a lower frequency, single element transducer is:

The most important factor required for the proper interpretation of ultrasonic test results is:

Which of the following frequencies would probably result in the greatest ultrasonic attenuation losses?

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:

Attenuation is made up of:

 Which of the following is the least efficient generator of ultrasonic waves:

17. Which of the following is the least efficient receiver of ultrasonic Energy?

When a sound beam is incident on an acoustic interface at some angle other than normal incidence, which of the following occurs?