FREE NDT Ultrasonic Testing Questions and Answers

Question 1

In a specific substance, the sound speed is:

Accepted Answer

Is constant

Answer

Increases with distance from the transducer

Answer

Decreases with distance from the transducer

Answer

None of the above

Question 2

The reflective surface of the discontinuity must have a diameter at least as long as ________ wavelength in order to provide a fair chance of being detected.

Accepted Answer

One-half

Answer

One

Answer

One-quarter

Answer

Two

Question 3

The term for the combined impact of absorption and dispersion is:

Accepted Answer

Attenuation

Answer

Propagation

Answer

Shear factor

Answer

Impedance

Question 4

The capacity to identify a tiny discontinuity is known as:

Accepted Answer

Sensitivity

Answer

Frequency

Answer

Wavelength

Answer

Resolution

Question 5

At a depth of roughly: Surface waves, also known as Rayleigh waves, travel along the surface of relatively thick solid materials.

Accepted Answer

One wavelength

Answer

Two wavelengths

Answer

Infinite wavelengths

Answer

Three wavelengths

Question 6

In the pulse echo mode, a single element transducer functions as follows:

Accepted Answer

Can not start receiving reflected signals until the element has stopped ringing from its transmit function

Answer

Needs to have a high pulse rate

Answer

Can only be made with lithium sulfate

Answer

Should be used in the dual mode

Question 7

In general, resolution rises:

Accepted Answer

With an increase in transducer frequency

Answer

With increased depth of a defect

Answer

With a decrease in the transducer frequency

Answer

When the transducer diameter is reduced

Question 8

DAC represents:

Accepted Answer

Distance Amplitude Correction

Answer

Divergence Application Couplant

Answer

Distance Application Code

Answer

Direct Amplitude Code

Question 9

Which kind of calibration block is utilized similarly to the small angle-beam block and looks a lot like it?

Accepted Answer

A DSC block

Answer

A shear wave calibration block

Answer

An IIW block

Answer

A rompus block

Question 10

Other names for longitudinal waves are:

Accepted Answer

Both Pressure waves and Compressional waves are correct

Answer

Compressional waves

Answer

Surface waves

Answer

Pressure waves