The two basic types of acoustical lenses used are:

The best surface resolution can be obtained using a:

Two single transducers, one a transmitter and one a receiver, mounted in a common case but separated by a sound barrier are called:

Double transducer testing reduces the so called “dead zone” found near the front surface of a specimen.

The acoustical impedance of an ideal couplant:

Wetting agents are sometimes added to couplants to:

Standard reference blocks are used to:

The front-and-back-surface reflection signals are eliminated from the C-scan recording by:

The carriage (bridge) on an immersion testing tank provides for the _______________ and _____________ motion of the transducer.

The test method where both the transducer and the test specimen are placed in a tank filled with a liquid (water) is called:

The requirement that the transmitting and receiving transducers have to be precisely aligned on the test specimen is a disadvantage of:

Which of the following actors is an advantage of contact testing over immersion testing? (Choose two)

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:

Plate waves may be used to test:

With reference to single-transducer pulse-echo testing, two-transducer pulse-echo testing has better:

Ultrasonic testing of castings is often not possible because of:

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

In immersion testing, the transducer will be transmitting its sound beam perpendicular to the test surface when the following indication is received on the CRT:

During immersion testing, it is often necessary to angulate the transducer when a discontinuity is located to:

In immersion testing and with reference to straight-beam testing where no facilities exist for automatic scanning and recording, the angle-beam technique is generally the more rapid scanning technique to use.

An ultrasonic equipment operator should primarily look for indications appearing to the left of the back-surface reflection because:

The wave mode that has multiple or varying wave velocities is:

Which of the following would be considered application(s) of ultrasonic techniques?

The only significant sound wave mode that travels through a liquid is a:

The acoustic impedance of a material is used to determine the:

When angle beam contact testing a test piece, increasing the incident angle until the second critical angle is reached results in:

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

It is possible for a discontinuity smaller than the transducer to produce indications of fluctuating amplitude as the transducer is moved laterally if testing is being performed in the:

In immersion testing, the near field effects of a transducer may be eliminated by:

In the far field of a uniform ultrasonic beam, sound intensity is ___________ the beam centerline.

Where does beam divergence occur?

As frequency increases in ultrasonic testing, the angle of beam divergence of a given diameter crystal:

What law can be used to calculate the angle of refraction within a metal for both longitudinal and shear waves?

At an interface between two different materials, an impedance difference results in:

In the immersion technique, the distance between the face of the transducer and the test surface (water path) is usually adjusted so that the time required to send the sound beam through the water:

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

Of the following scan types, which one can be used to produce a recording of flaw areas superimposed over a plan view of the test piece?

A set of standard reference blocks with the same geometrical configuration and dimensions other than the size of the calibration reflectors, e.g., flat bottom holes, is called a set of:

The angle at which 90 degrees refraction of a longitudinal sound wave is reached is called: