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1.

2. High amplitude events during the examination of fiberglass-reinforced pressure (FRP) vessels usually indicates:

 
 
 
 

2.

When an elastic material is stretched elastically, the stress is:

 
 
 
 

3.

1. According to Table T-1121 of ASME Section V, Article 11 (below), how much time must a pressure vessel, normally operated at 414 kPa (60 psig), be operated at 207 kPa (30 psig) before acoustic emission examination?
Table-T-1121.png

 
 
 
 

4.

Which of the following terms means a material’s ability to resist crack growth?

 
 
 
 

5.

A particular accelerometer has a resonant frequency of 30 kHz. When used to detect acoustic emission, it “rings” at this resonant frequency. The time between successive peaks (period) is:

 
 
 
 

6.

Detection of an acoustic emission signal depends on:

 
 
 
 

7.

A limitation of the acoustic emission applied to metals is that it:

 
 
 
 

8.

A major benefit of the acoustic emission method is that it:

 
 
 
 

9.

MARSE is:

 
 
 
 

10.

The concept that all, or nearly all, materials are capable of generating acoustic emission was first set forth in 1950 by:

 
 
 
 

11.

A typical source mechanism of acoustic emission is:

 
 
 
 

12.

The Felicity ratio is a quantitative measure best used to evaluate:

 
 
 
 

13.

When selecting the best sensor frequency for a particular acoustic emission test, it is important to consider all of the following  except:

 
 
 
 

14.

After an initial proof test, a defect grows during a year in service. Acoustic emission can often detect this defect during a second proof test. Dunegan’s reasoning for this phenomena is that  the:

 
 
 
 

15.

The positioning of sensors for acoustic emission testing of metal pressure vessels is commonly based on:

 
 
 
 

16.

Of the following components, which one is not considered to be part of a typical acoustic emission sensor?

 
 
 
 

17.

When performing source location, which of the following most directly affects the accuracy of computed location?

 
 
 
 

18.

In acoustic emission testing of fiberglass-reinforced pressure (FRP) tanks and pressure vessels, significant activity on low-frequency sensors and very little activity on high-frequency sensors normally indicate:

 
 
 
 

19.

In acoustic emission testing of fiberglass-reinforced pressure (FRP) tanks and pressure vessels, low-frequency sensors are used for:

 
 
 
 

20.

Which of the following factors tend to increase the amplitude of the acoustic emission response?

 
 
 
 

21.

If a crack is detected by AE during a pressure test, how can its existence be verified using AE?

 
 
 
 

22.

If rain starts falling on an uninsulated vessel during an AE test and produces significant background noise, the AE test operator should:

 
 
 
 

23.

AE generated during proof testing when the load is between the service load and the maximum proof load, is indicative of the damage experienced during the preceding working period. This is the basic idea put forth through:

 
 
 
 

24.

Attenuation in metals is due primarily to:

 
 
 
 

25.

AE produced by a liquid leaking through a valve is due primarily to:

 
 
 
 

26.

An additional source of background noise that is sometimes detected during AE testing of in-service metal storage tanks is:

 
 
 
 

27.

What is the main difference in testing spheres as compared to bullets and drums?

 
 
 
 

28.

AE testing of in-service vessels is aimed primarily at detecting service-related cracking. This cracking may be a result of:

 
 
 
 

29.

The size, shape, and orientation of defects detected by AE testing, are usually determined by:

 
 
 
 

30.

When testing in-service pressure vessels, the maximum test load is commonly based on the maximum operating pressure experienced:

 
 
 
 

31.

Why is it wise to start an AE test for an in-service pressure vessel at a load lower than required?

 
 
 
 

32.

During continuous monitoring of pressure boundaries, AE sources are stimulated by:

 
 
 
 

33.

During continuous monitoring of pressure boundaries per ASTM E 1139, AE system operation and data interpretation should be verified by a qualified AE specialist:

 
 
 
 

34.

During continuous monitoring of pressure boundaries per ASTM E 1139, a 0.3 mm, 2H pencil lead break at a distance of 300 mm (12 in.) should produce a signal-to-noise ratio of

 
 
 
 

35.

During continuous monitoring of pressure boundaries, signal detection sensitivity should be evaluated during normal operation:

 
 
 
 

36.

During continuous monitoring of pressure boundaries, the distance at which an AE source can be detected is maximized by using a recommended low monitoring frequency of:

 
 
 
 

37.

During continuous monitoring of pressure boundaries, an AE system can perform leak detection if:

 
 
 
 

38.

For continuous monitoring of pressure boundaries, source location can be performed using:

 
 
 
 

39.

During continuous monitoring of pressure boundaries, leaks are indicated by

 
 
 
 

40.

What characteristic of a part best determines whether a test piece should be considered a large part or a small part for AE testing purposes?

 
 
 
 

41.

Of the following situations, which is the most appropriate for using only a single AE sensor?

 
 
 
 

42.

For checking zonal location sensitivity, what is the minimum number of AE sensors that shall detect a simulated source at any given position on the structure?

 
 
 
 

43.

When monitoring a source of AE, the acoustic activity (as measured by event count or emission count) does not increase with increasing stimuli. Which of the following classifications apply to this source?

 
 
 
 

44.

When monitoring a source of AE, the acoustic activity (as measured by event count or emission count) increases with increasing stimuli. Which of the following classifications apply to this source? Note: for this question, the rate of acoustic activity is not increasing with increasing stimuli.

 
 
 
 

45.

When monitoring a source of AE, the rate of acoustic activity (as measured by event count or emission count) increases with increasing stimuli. Which of the following classifications apply to this source?

 
 
 
 

46.

46. When monitoring a source of AE, both of the following are found to be true: the acoustic activity (as measured by event count or emission count) increases with increasing stimuli; the intensity (as measured by average energy per event or average emission count per event or average amplitude per event) exceeds the average intensity by a fixed level.
Which of the following classifications should be used to describe this source?

 
 
 
 

47.

While there are no set criteria for acceptable limits on sensor degradation, what levels of discrepancy warrant further action?

 
 
 
 

48.

High amplitude events during the examination of fiberglass-reinforced pressure (FRP) vessels usually indicate:

 
 
 
 

49.

When an elastic material is stretched elastically, the stress is:

 
 
 
 

50.

A limitation of the acoustic emission method applied to metals is that it:

 
 
 
 

51.

Which of the following terms means a material’s ability to resist crack growth?

 
 
 
 

52.

A limitation of the acoustic emission method applied to metals is that it:

 
 
 
 

53.

A major benefit of the acoustic emission method is that it:

 
 
 
 

54.

MARSE is:

 
 
 
 

55.

The concept that all, or nearly all, materials are capable of generating acoustic emission was first set forth in 1950 by:

 
 
 
 

56.

A typical source mechanism of acoustic emission is:

 
 
 
 

57.

The felicity ratio is a quantitative measure best used to evaluate:

 
 
 
 

58.

When selecting the best sensor frequency for a particular acoustic emission test, it is important to consider all of the following except:

 
 
 
 

59.

After an initial proof test, a defect grows during a year in service. Acoustic emission can often detect this defect during a second proof test. Dunegan’s reasoning for this phenomena is that the:

 
 
 
 

60.

The positioning of sensors for acoustic emission testing of metal pressure vessels is commonly based on:

 
 
 
 

61.

Of the following components, which one is A not considered to be part of a typical acoustic emission sensor?

 
 
 
 

62.

When performing source location, which of the following most directly affects the accuracy of computed location?

 
 
 
 

63.

In acoustic emission testing of fiberglass-reinforced pressure (FRP) tanks and pressure vessels. significant activity on low-frequency sensors and very little activity on high frequency sensors normally indicate:

 
 
 
 

64.

In acoustic emission testing of fiberglass-reinforced pressure (FRP) tanks and pressure vessels, low-frequency sensors are used for:

 
 
 
 

65.

Which of the following factors tends to increase the amplitude of the acoustic emission response?

 
 
 
 

66.

One of the two major differences in the acoustic emission method from other forms of NOT is that:

 
 
 
 

67.

One advantage of using acoustic emission over other forms of NOT is that acoustic emission can:

 
 
 
 

68.

Which of the following facilitates the transmission of acoustic waves into a typical sensor

 
 
 
 

69.

When should a system performance evaluation* be performed?
A performance evaluation in this case is a simulated AE, such as a pencil lead break, in the test structure to verify that the AE system registers the appropriate level of AE.

 
 
 
 

Question 1 of 69

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