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?

During the manufacturing of a casting, the purpose of a riser is:

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. Most commercial ultrasonic testing is performed at frequencies between:

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

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

2. For a transducer with any given Q, resolution increases with:

3. Resolving power of a transducer is directly proportional to its:

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:

4. The term is used to refer to the product of wave velocity and density is:

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

Lower frequency transducers produce:

5. For an ultrasonic beam with normal incidence, the reflection coefficient is given by:

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?

6. For an ultrasonic beam with normal incidence the transmission coefficient is given
by:

The only sound waves which travel in liquids are:

7. Snell’s law is given by which of the following:

In steel, the velocity of sound is greatest in which of the following modes of
vibration?

8. Snell’s law is used to calculate:

The scattering of the rays of an ultrasonic beam due to reflection from a highly
irregular surface is called:

Acoustic impedance is a material’s:

9. Calculate the refracted shear wave angle in steel [VS = 0.323cm/microsec] for an
incident longitudinal wave of 37.9 degrees in Plexiglas [VL = 0.267cm/microsec]

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

10. Calculate the refracted shear wave angle in steel [VS = 0.323cm/microsec] for an
incident longitudinal wave of 45.7 degrees in Plexiglas [VL = 0.267cm/microsec]

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:

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

Attenuation is made up of:

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

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