The gate width control: (Choose two)

The alarm sensitivity control in a flaw-alarm / gating circuit:

The DAC (Distance Amplitude Correction) control adjusts the instrument sensitivity so that discontinuities of the same size will generate pips of the same height, regardless of the depth of the discontinuity in the specimen.

The test system which relies on reflected energy to find discontinuities is called:

The test system that uses either pulsed or continuous sound and indicates discontinuities as a reduction in received energy magnitude is called:

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)

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:

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 testing each grid square using:

The revolution indication found on a CRT screen when testing pipe represents

Generally, the best ultrasonic testing method for detecting discontinuities oriented along the fusion zero in a welded plate is:

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:

An unbonded condition can best be detected when the materials involved give a good coupling when bonded.

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

An ultrasonic test instrument that displays pulses representing the amplitude of reflected sound as a function of time and distance is said to display:

The line of light that appears across the face of a CRT screen is called the: (Choose two)

The metal distance of a standard reference block is defined as the distance between the:

The Alcoa, Series A, area amplitude blocks have flat-bottomed holes:

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 higher the frequency of a transducer, the:

Large diameter, single crystal transducers are generally:

Angle beam transducers are used to

Contact angle- beam transducers are generally identified by the:

The mode of vibration in steel that has the greatest sound velocity is the:

The A-scan displays information of a discontinuity’s depth and its:

The factor that determines the amount of reflection at the interface of two dissimilar materials is the:

Where might microshrinkage occur in a casting?

Greater beam spread occurs in search units with:

A standing wave in resonance testing is established by adjusting the :

Using the through transmission technique, the quality of an object is determined by the

Discontinuities in rolled product forms are most likely oriented:

The major difference between immersion and contact search units is their:

In immersion testing, the angle formed by the ultrasound beam and a line perpendicular to the component surface