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

 
 
 
 

2.

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

 
 

3.

One microvolt is the same as:

 
 
 
 

4.

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:

 
 
 
 

5.

The Kaiser effect refers to:

 
 
 
 

6.

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

 
 
 
 

7.

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

 
 
 
 

9.

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

 
 
 
 

10.

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

 
 
 
 

11.

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

 
 
 
 

12.

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

 
 
 
 

13.

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?

 
 
 
 

14.

The most common frequency range of acoustic emission testing is:

 
 
 
 

15.

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

 
 
 
 

16.

The kaiser effect is useful in distinguishing:

 
 
 
 

17.

The felicity effect is useful in evaluating:

 
 
 
 

18.

How many transducers are used to record the acoustic waves?

 
 
 
 

19.

What is the Kaiser effect?

 
 
 
 

20.

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

 
 
 
 

21.

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

 
 
 
 

22.

The founder of modern acoustic emission technology was:

 
 
 
 

23.

What is a guard sensor?

 
 
 
 

24.

The acoustic emission signal amplitude is related to:

 
 
 
 

25.

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

 
 
 
 

26.

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

 
 
 
 

27.

What generates the acoustic waves?

 
 
 
 

28.

What is an important wave mode in AE testing?

 
 
 
 

29.

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

 
 
 
 

31.

What did Hsu-Nielsen invent?

 
 
 
 

32.

Background noise can be reduced by:

 
 
 
 

33.

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

 
 
 
 

34.

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

 
 
 
 

35.

Attenuation of a wave is best defined by which statement?

 
 
 
 

36.

The founder of modern acoustic emission technology was:

 
 
 
 

37.

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

 
 
 
 

38.

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

 
 
 
 

39.

In what acoustic frequency range works AE testing usually?

 
 
 
 

40.

The total energy loss of a propagating wave is called:

 
 
 
 

41.

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

 
 
 
 

42.

The term “counts” refers to the:

 
 
 
 

43.

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

 
 

44.

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

 
 
 
 

45.

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

 
 
 
 

46.

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:

 
 
 
 

47.

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

 
 
 
 

48.

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

 
 
 
 

49.

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

 
 
 
 

50.

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

 
 
 
 

52.

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

 
 
 
 

53.

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

 
 
 
 

54.

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

 
 
 
 

55.

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

 
 
 
 

56.

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

 
 
 
 

57.

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

 
 
 
 

58.

AE sensors may be mounted directly to painted surfaces if:

 
 
 
 

59.

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

 
 
 
 

60.

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

 
 
 
 

61.

Threshold settings are determined by the:

 
 
 
 

62.

What effect appears first when loading a material?

 
 
 
 

63.

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?

 
 
 
 

64.

What kind of signal is generated by a crack?

 
 
 
 

65.

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

 
 
 
 

66.

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:

 
 
 
 

Question 1 of 66

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