Which of the following transducer materials is the most efficient receiver of ultrasonic energy?

A plan view representation of a test piece is produced by which of the following?

A disadvantage of using natural quartz crystals in a search unit is that:

A common use of ultrasonic testing is:

An ultrasonic instrument control which is used to expand or contract the horizontal base line of an A scan display is called:

The ability to detect echoes from small reflectors is called:

Which of the following circuits converts electrical energy to ultrasonic energy?

An ultrasonic instrument control which allows moving A scan display to the left or right without changing the distance between any echoes displayed is called

Which type(s) of sound wave modes will propagate through liquids?

As transducer crystal thickness decreases:

A standard block which can be used to calibrate an instrument for an angle beam range calibration is:

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

Piezoelectric ability is the property of a material to:

Transducer focal lengths are normally specified as:

An ultrasonic wave in which particle displacement is 90 degrees to the direction of wave propagation is called a:

An instrument display in which the horizontal base line represents elapsed time and the vertical deflection represents signal amplitudes is called:

Which of the following is a true statement

Echo amplitude losses may be caused by:

Which of the following is true?

Most commercial ultrasonic testing is accomplished using frequencies between:

Which of the following circuits provides timing signals to the pulser?

All other factors being equal, which of the following modes of vibration has the greatest velocity?

A second name for Rayleigh waves is:

An advantage of using lithium sulphate in search units it that:

The three most common modes of sound vibration are: