Quiz 3

Question 1

1)

A polar diagram plots the ultrasonic beam with relation to distance and intensity?

Question 2

2)

The maximum sound pressure in an ultrasonic beam does not lie on the beam axis?

Question 3

3)

Side lobes occur in an ultrasonic beam?

Question 4

4)

Crystal diameter does not affect the shape of the polar diagram?

Question 5

5)

Rapid variations in sound pressure at the crystal face does not affect the ultrasonic beam?

Question 6

6)

The Fresnel zone is the far zone and the Fraunhofer zone is the near zone?

Question 7

7)

The ultrasonic beam has a near zone which is changed by changing probe frequency?

Question 8

8)

Flaws cannot be sized if the assesment is carried out in the near zone?

Question 9

9)

Unable to insert equation // refer to quiz 3 in the books

Question 10

10)

The DGS (AVG) system relates flaw distance, attenuator value and flaw size?

Question 11

11)

Flat bottomed holes of the same diameter at different distances from the probe is used to produce a DAC curve?

Question 12

12)

The distance of the near zone is a critical value when using the DGS (AVG) system?

Question 13

13)

The DGS (AVG) system and the DAC system will accurately measure flaw size?

Question 14

14)

The maximum amplitude 6 and 20 dB systems may be used to size flaws?