Lesson 4 UT Flashcards

1
Q

When mechanical pressure is applied to piezoelectric materials, the crystalline structure:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When an electric field is applied to piezoelectric materials, the structure_____, producing dimensional charges in the material.

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Piezoelectricity refers to a re4versible phenomenon where by a crystal, when vibrated:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When an electric current is applied to the piezoelectric crystal, it:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Ultrasonic pulsed vibrations propagate through the test object with a velocity that depends mainly on the _________ and ______ of test material.

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The transducer is a device that converts energy from one form to:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In material with a given velocity, when frequency is increased, the wavelength will:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Most commercial ultrasonic testing is performed using frequencies between:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

It has been proven that ________ distinct zones are always present within the sonic beam.

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Sensitivity is related to wavelength as follows:

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The phrase” uneven intensities of the energy wave not related to distance of travel within the material” specifically relates to the physics of the :

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The length of the near field is dependent on:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The length of the near field can be computed using which formula?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The peak point exits at the:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Beam spread begins at the:

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The degree of beam spread can be computed to a specific:

A
17
Q

As relating to beam spread, the larger the crystal, the ________ the beam.

A
18
Q
A