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.

What is an important wave mode in AE testing?

 
 
 
 

2.

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

 
 
 
 

3.

The acoustic emission signal amplitude is related to:

 
 
 
 

4.

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

 
 
 
 

5.

The most common frequency range of acoustic emission testing is:

 
 
 
 

6.

The total energy loss of a propagating wave is called:

 
 
 
 

7.

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

 
 
 
 

8.

Threshold settings are determined by the:

 
 
 
 

9.

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

 
 
 
 

10.

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

 
 
 
 

11.

Also Read:  Temp - Reduction in Subsize Specimen for Charpy Impact Test

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

 
 
 
 

12.

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?

 
 
 
 

13.

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

 
 
 
 

14.

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

 
 
 
 

15.

In what acoustic frequency range works AE testing usually?

 
 
 
 

16.

The felicity effect is useful in evaluating:

 
 
 
 

17.

What can AE not be used for?

 
 
 
 

18.

What did Hsu-Nielsen invent?

 
 
 
 

19.

The founder of modern acoustic emission technology was:

 
 
 
 

20.

One microvolt is the same as:

 
 
 
 

21.

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

 
 

22.

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

 
 
 
 

23.

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?

 
 
 
 

24.

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

 
 
 
 

25.

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

 
 
 
 

26.

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

 
 
 
 

27.

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

 
 
 
 

28.

The kaiser effect is useful in distinguishing:

 
 
 
 

29.

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

 
 
 
 

31.

The Kaiser effect refers to:

 
 
 
 

32.

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

 
 
 
 

33.

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

 
 
 
 

34.

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

 
 
 
 

35.

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

 
 
 
 

36.

What is the Kaiser effect?

 
 
 
 

37.

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

 
 
 
 

38.

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

 
 
 
 

39.

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

 
 
 
 

40.

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

 
 
 
 

41.

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

 
 
 
 

42.

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

 
 
 
 

43.

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

 
 
 
 

44.

How many transducers are used to record the acoustic waves?

 
 
 
 

45.

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

 
 
 
 

46.

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

 
 
 
 

47.

Background noise can be reduced by:

 
 
 
 

48.

What effect appears first when loading a material?

 
 
 
 

50.

AE sensors may be mounted directly to painted surfaces if:

 
 
 
 

51.

What kind of signal is generated by a crack?

 
 
 
 

52.

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

 
 
 
 

53.

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

 
 
 
 

54.

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:

 
 
 
 

55.

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

 
 
 
 

56.

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

 
 
 
 

57.

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

 
 
 
 

58.

What generates the acoustic waves?

 
 
 
 

59.

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:

 
 
 
 

60.

The term “counts” refers to the:

 
 
 
 

61.

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

 
 
 
 

62.

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

 
 
 
 

63.

The founder of modern acoustic emission technology was:

 
 
 
 

64.

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:

 
 
 
 

65.

What is a guard sensor?

 
 
 
 

66.

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

 
 

Question 1 of 66

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