Free ASNT Ultrasonic Questions and Answers

Question 1

The indication on the instrument display that represents the far boundary of the material being tested is called:

Accepted Answer

The back surface reflection

Answer

Hash

Answer

The initial pause

Answer

The main bang

Question 2

In immersion testing, the position of the transducer is often varied to transmit sound into the test part at various angles to the front surface. Such a procedure is referred to as:

Accepted Answer

Angulation

Answer

Dispersion

Answer

Reflection testing

Answer

Refraction

Question 3

The cable that connects the ultrasonic instrument to the transducer is specially designed so that one conductor is centered inside another. The technical name for such a cable is:

Accepted Answer

Coaxial cable

Answer

BX cable

Answer

Conduit

Answer

Ultrasonic conductor cable-grade 20

Question 4

The process of comparing an instrument or device with a standard is called:

Accepted Answer

Calibration

Answer

Angulation

Answer

Attenuation

Answer

Correlation

Question 5

Another name for a compressional wave is:

Accepted Answer

Longitudinal wave

Answer

Lamb wave

Answer

Shear wave

Answer

Transverse wave

Question 6

Another name for Rayleigh wave is:

Accepted Answer

Surface waves

Answer

Shear waves

Answer

Longitudinal waves

Answer

Transverse waves

Question 7

A material used between the face of a transducer and the test surface to permit or improve the transmission of ultrasonic vibrations from the transducer to the material being tested is called:

Accepted Answer

A couplant

Answer

A wetting agent

Answer

An acoustic transmitter

Answer

A lubricant

Question 8

The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is called a:

Accepted Answer

Crystal

Answer

Backing material

Answer

Lucite wedge

Answer

Couplant

Question 9

The transducer that contains the thinnest piezoelectric crystal is a:

Accepted Answer

25 MHz transducer

Answer

1 MHz transducer

Answer

5 MHz transducer

Answer

15 MHz transducer

Question 10

A 25 MHz transducer would most likely be used during:

Accepted Answer

Immersion testing

Answer

Straight beam contact testing

Answer

Angle beam contact testing

Answer

Surface wave contact testing