An ultrasonic test using a straight beam contact transducer is being conducted through the thickness of a flat part such as a plate. This test should detect:

When testing by the surface wave method, patches of oil or dirt on the surface may:

In immersion testing, verification that the transducer is normal to a flat entry surface is indicated by:

On many ultrasonic testing instruments, an operator conducting an immersion test can remove that portion of the display presentation that represents water distance by adjusting a:

The presence of a discontinuity will not produce a specific discontinuity indication on the ultrasonic instrument display when using the:

Which of the following discontinuities located 152 mm (6 in.) from the entry surface results in the largest display indication if all factors except discontinuity surface condition and orientation are the same?

Circuits that electronically amplify return signals from the receiving transducer and often modify the signals into a form suitable for display are called

A circuit that coordinates electronic operation of the entire ultrasonic instrument system is called:

In addition to other functions, a transducer manipulator in a mechanical immersion-scanning unit permits:

An amplitude type gate is necessary for all:

In straight beam pulse echo testing, a discontinuity with a rough reflecting surface perpendicular to the incident wave has what effect on the detected signal in comparison to a smooth flat bottom hole of the same size?

If a 5 MHz transducer is substituted for a 2.25 MHz transducer, the effect on the wavelength of a longitudinal mode wave produced in the test specimen is that:

The proper interpretation and evaluation of the presented defects signals are essential to any nondestructive test. A common method for the estimation of defect size is the use of:

The pulser circuit in an ultrasonic instrument is used to:

The variable in distance amplitude calibration block construction is the:

In immersion testing, when the sound beam strikes a concave surface, the sound beam tends to: