AE Level 1 :: Acoustic Emission Testing MCQ’s Part-1| Quiz Practice for ASNT/NDT Exam Questions

Non-Destructive Testing: Total 66′ Questions for Conduct of Examinations at NDT IRT Level-1. (Quiz Part-1 66′ .).

Acoustic Emission Testing Level -1 (AT) General Examination Quiz

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AT Level 1 ASNT / NDT Test 1. This is a quiz over the various topics covered throughout the Acoustic Emission Testing Level 1 section to test your understanding. Click “below button ‘or ‘Scroll down” to start your test.

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AT Level 1 :: NDT Acoustic Emission Testing MCQ’s Part-1

1.

The most common frequency range of acoustic emission testing is:

 
 
 
 

2.

The kaiser effect is useful in distinguishing:

 
 
 
 

3.

What did Hsu-Nielsen invent?

 
 
 
 

4.

The felicity effect is useful in evaluating:

 
 
 
 

5.

AE sensors may be mounted directly to painted surfaces if:

 
 
 
 

6.

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

 
 
 
 

7.

The founder of modern acoustic emission technology was:

 
 
 
 

8.

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

 
 
 
 

9.

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

 
 
 
 

10.

Which of the following methods of NDT requires leak proofing of casting before inspection?

 
 
 
 

11.

Attenuation of a wave is best defined by which statement?

 
 
 
 

12.

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

 
 
 
 

13.

The Kaiser effect refers to:

 
 
 
 

14.

One microvolt is the same as:

 
 
 
 

15.

What kind of signal is generated by a crack?

 
 
 
 

16.

What can AE not be used for?

 
 
 
 

17.

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:

 
 
 
 

18.

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

 
 
 
 

19.

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

 
 
 
 

20.

Impact test for detection of defects in the casting is the most crude and unreliable method of non-destructive testing.

 
 

21.

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

 
 
 
 

22.

How many transducers are used to record the acoustic waves?

 
 
 
 

23.

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

 
 
 
 

24.

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

 
 
 
 

25.

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

 
 
 
 

26.

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

 
 
 
 

27.

The total energy loss of a propagating wave is called:

 
 
 
 

28.

Background noise can be reduced by:

 
 
 
 

29.

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

 
 
 
 

30.

What is an important wave mode in AE testing?

 
 
 
 

31.

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

 
 
 
 

32.

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

 
 
 
 

33.

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

 
 
 
 

34.

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

 
 
 
 

35.

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

 
 
 
 

36.

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

 
 
 
 

37.

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

 
 
 
 

38.

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

 
 
 
 

39.

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?

 
 
 
 

40.

What is the Kaiser effect?

 
 
 
 

41.

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

 
 
 
 

42.

Threshold settings are determined by the:

 
 
 
 

43.

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

 
 
 
 

44.

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

 
 
 
 

45.

What generates the acoustic waves?

 
 
 
 

46.

In what acoustic frequency range works AE testing usually?

 
 
 
 

47.

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

 
 
 
 

48.

The founder of modern acoustic emission technology was:

 
 
 
 

49.

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:

 
 
 
 

50.

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

 
 
 
 

51.

What effect appears first when loading a material?

 
 
 
 

52.

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

 
 
 
 

53.

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

 
 
 
 

54.

The term “counts” refers to the:

 
 
 
 

55.

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

 
 
 
 

56.

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:

 
 
 
 

57.

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

 
 
 
 

58.

What is a guard sensor?

 
 
 
 

59.

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

 
 
 
 

60.

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

 
 
 
 

61.

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

 
 
 
 

62.

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 ?V
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?

 
 
 
 

63.

The acoustic emission signal amplitude is related to:

 
 
 
 

64.

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

 
 
 
 

65.

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

 
 
 
 

66.

In non-destructive testing, sound test used is a very fine and accurate method of detecting flaws in the castings

 
 

Question 1 of 66

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