Take A Free ASNT NDT AE Level 1 Exam Practice Test – Quiz Course

1.

Which of the following can be a significant source of background noise?

2.

The elastic energy that is released by materials when they undergo deformation is called:

3.

One of the two major differences in the acoustic emission method from other forms of NDT is that

4.

One advantage of using acoustic emission over other forms of NDT is that acoustic emission can:

5.

During loading, a metallic structure emits throughout the test period. When the load is reduced and then reapplied, no emissions are noted until the previous stress level was exceeded. This phenomenon is an example of the:

6.

The founder of modern acoustic emission technology was:

7.

Hold periods at high loads during fiberglass-reinforced pressure (FRP) vessel examinations using ASME Article 11 are necessary to:

8.

In acoustic emission testing per ASME Section V, Article 11, sensor spacing on fiberglass-reinforced pressure (FRP) pressure vessels is governed by:

9.

How can an examiner be assured that proper contact has been made between the sensor and the vessel?

10.

The source of the energy of the acoustic emission wave during crack growth is the:

11.

The test most often performed on a structure to determine maximum sensor spacing is called:

12.

The use of a couplant between the acoustic emission sensor and the surface of the material being tested is to provide:

13.

During a pressure vessel test, there is a rapidly (exponentially) increasing count rate. There are several possible causes. The operator’s first priority is to examine the possibility that:

14.

In order for an acoustic emission (AE) system to detect an active AE source in a material, the AE sensor must be placed:

15.

Which of the following is measured in meters per second (m/s)?

16.

A sensor is positioned 3 m from an acoustic emission (AE) source. If a particular component of the AE wave travels at 3000 m/s, how long will it take this? component to travel from source to sensor?

17.

One of the major differences in the acoustic emission NDT method. compared to most other NDT methods is that:

18.

Which of the following facilitates the transmission of acoustic waves to a typical sensor?

19.

The signal amplitude (in decibels) is given as
A = 20 log10 (V/V0)- Gp

where:
v = Signal Amplitude at the preamp output, in microvolts
Vo = Reference Voltage= 1.0 μV
Gp= Preamplifier Gain = 40 dB
What is the signal amplitude (in decibels) of an AE signal captured at the preamplifier output on an oscilloscope and measuring 1.0 V?

20.

One microvolt is the same as:

21.

Raising the detection threshold (or lowering the gain) to reduce background noise is not desired because it can lead to:

22.

The active element inside an AE sensor that senses surface displacements is usually:

23.

When should a waveguide be used in place of an adhesive for coupling an AE transducer to a text object?

24.

AE sensors may be mounted directly to painted surfaces if:

25.

The most common way of attaching AE sensors to carbon steel vessels that operate at low to medium temperatures is:

26.

The most common artificial source of AE used to verify sensor coupling is:

27.

ASTM E 1139-02 applies to metal pressure boundaries in industrial systems such as:

28.

What information should be recorded about background noise during a test?

29.

Which of the following is recommended for monitoring and recording of the applied load in an AE test?

30.

A qualitative description of the sustained signal level produced by rapidly occurring acoustic emission events is the accepted term for:

31.

Attenuation of a wave is best defined by which statement?

32.

The number of times the acoustic emission signal exceeds a preset threshold during any selected portion of a test is called the acoustic emission ______________.

33.

The most common frequency range of acoustic emission testing is:

34.

Discontinuities that are not readily detectable by acoustic emission testing are:

35.

The total energy loss of a propagating wave is called:

36.

Hold periods at high loads during fiberglass-reinforced pressure (FRP) vessel examinations using ASME Article 11 are necessary to:

37.

In acoustic emission testing per ASME Section V, Article 11, sensor spacing on fiberglass-reinforced pressure (FRP) vessels is governed by:

38.

How can an examiner be assured that proper contact has been made between the sensor and the vessel?

39.

The source of the energy of the acoustic emission wave during crack growth is the:

40.

Which of the following can be a significant source of background noise?

41.

The elastic energy that is released by materials when they undergo deformation is called:

42.

During loading, a metallic structure emits throughout the test period. When the load is reduced and then reapplied, no emissions are noted until the previous stress level was exceeded. This is an example of:

43.

The Kaiser effect refers to:

44.

The founder of modern acoustic emission technology was:

45.

The felicity effect is useful in evaluating:

46.

The kaiser effect is useful in distinguishing:

47.

The term “counts” refers to the:

48.

The acoustic emission signal amplitude is related to:

49.

Threshold settings are determined by the:

50.

Background noise can be reduced by:

51.

In what acoustic frequency range works AE testing usually?

52.

What generates the acoustic waves?

53.

How many transducers are used to record the acoustic waves?

54.

What kind of signal is generated by a crack?

55.

What is a guard sensor?

56.

What did Hsu-Nielsen invent?

57.

What is the Kaiser effect?

58.

What effect appears first when loading a material?

59.

What can AE not be used for?

60.

What is an important wave mode in AE testing?

61.

A qualitative description of the sustained signal level produced by rapidly occurring acoustic emission events is the accepted definition for:

62.

The attenuation of a wave is best defined by which statement?

63.

The number of times the acoustic emission signal exceeds a preset threshold during any selected portion of a test is called the: