Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ASNT Study Guide - Chapter 4 > Liquid Penetrant Testing (PT) Review Questions > Flashcards

Liquid Penetrant Testing (PT) Review Questions Flashcards

1
Q
  1. The tendency of a liquid penetrant to enter a discontinuity is primarily related to:
    A. The viscosity of the penetrant
    B. Capillary forces
    C. The chemical internet’s of the penetrant
    D. The specific gravity of the penetrant
A

B. Capillary forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. Liquid penetrant testing is a nondestructive method that can be used for:
    A. Locating and evaluating all types of discontinuities in a test specimen
    B. Locating and determining the length, width and depth of discontinuities
    C. Determining the tensile strength of a test specimen
    D. Locating discontinuities open to the surface
A

D. Locating discontinuities open to the surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. Which of the following is not a characteristic that applies to liquid penetrant testing?
    A. This method can accurately measure the depth of a crack or discontinuity
    B. This method can be used for on-site testing of large parts
    C. This method can be used to find shallow surface discontinuities
    D. This method can be made more or less sensitive by using different penetrant materials
A

A. This method can accurately measure the depth of a crack or discontinuitiy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q 
4. The property of a dye used in penetrant materials to emit light in the range of wavelengths different from the wavelength of light that excites the emission is called:
A. Emissivity
B. Irradiation
C. Spectrum blocking 
D. Fluorescence
A

D. Fluorescence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q 
5. When using a fluorescent, post-emulsified penetrant, the length of time the emulsifier is allowed to remain on the part is critical for detecting shallow discontinuities.  The optimum length of time should be:
A. 10 seconds
B. 5 seconds
C. 2-3 minutes
D. Determined by experimentation
A

D. Determined by experimentation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. A red penetrant indication against white background is most likely to be seen when:
    A. Dry developers are used
    B. Visible dye penetrants are used
    C. Fluorescent post-emulsified penetrant are used
    D. Ultraviolet light is used with visible dye penetrant
A

B. Visible dye penetrants are used

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. The most widely accepted method for removing excessive water-washable penetrant from the surface of a test specimen is by:
    A. Using a wet rag
    B. Using a water spray rinse
    C. Washing the part directly under water running from a tap
    D. Immersing the part in water
A

B. Using a water spray rinse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q 
8. Which of the following penetrant systems is generally considered the least sensitive?
A. Water-washable: Visible dye
B. Solvent-removable: Visible dye
C. Water-washable: Fluorescent 
D. Post-emulsified: Visible dye
A

A. Water-washable: Visible dye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. When performing a liquid penetrant test using solvent-removable visible dye penetrant, there are several ways to remove excess penetrant from the surface of the part. Which of the methods listed is generally regarded as most suitable for giving accurate test results?
    A. Squirting solvent over the surface with no more than 10 psi pressure
    B. Wiping the solvent-soaked cloth, then wiping with a dry cloth
    C. Wiping with solvent-dampened cloth, then wiping with dry cloth
    D. Wiping with dry wipes, then wiping with a solvent-dampened cloth and finally wiping with a dry cloth
A

D. Wiping with dry wipes, then wiping with a solvent-dampened cloth and finally wiping with a dry cloth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. A problem with retesting a specimen that has been previously tested using liquid penetrant is that the:
    A. Penetrant may form beads on the surface
    B. Penetrant residue left in discontinuities may not readily dissolve and the retest may be misleading
    C. Penetrant will lose a great deal of its color brilliance
    D. Added penetrant will intensify the penetrant residue, making indications larger than normal
A

B. Penetrant residue left in the discontinuities may not readily dissolve and the retest may be misleading

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. A commonly used method of checkin the overall performance of a penetrant material system is to:
    A. Determine the viscosity of the penetrant
    B. Measure the wet-ability of the penetrant
    C. Compare two sections of artificially cracked specimens
    D. Check the penetrant containment levels
A

C. Compare two sections of artificially cracked specimens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. The function of emulsifier in the post-emulsified penetrant process is to:
    A. More rapidly drive the penetrant into deep, thighs cracks
    B. React with the surface penetrant to make the penetrant water-washable
    C. Add fluorescent dye or pigment to the penetrant
    D. Emulsify surface oils and greases to facilitate their removal
A

B. React with the surface penetrant to make the penetrant water-washable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. Which of the following statements does not apply to developers used during penetrant testing?
    A. Developers are normally highly fluorescent
    B. Some developers furnish a contrasting background during inspection
    C. Developers absorb or blot the penetrant that remains in discontinuities after the excess penetrant has been removed
    D. Non aqueous developers are better suited for detecting fine cracks
A

A. Developers are normally highly fluorescent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. The penetrant indication for a cold shut on the surface of a casting will normally be:
    A. A dotted line
    B. A large bulbous indication
    C. A smooth continuous line
    D. Undetectable since cold shuts are closed over on the surface
A

C. A smooth continuous line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. A crack-type discontinuities will generally appear as:
    A. A rounded indication
    B. A continuous line, either straight or jagged
    C. A broad, fuzzy indication
    D. Random round or elongated holes
A

B. A continuous line, either straight or jagged

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q 
16. In a penetrant test, scattered round indications on the surface of a part could be indicative of:
A. Fatigue cracks
B. Porosity
C. Weld laps
D. Hot tears
A

B. Porosity

17
Q
  1. Which of the following are typical non-relevant indications found in penetrant testing?
    A. Indications due to part geometry or part design configuations
    B. Nonmagnetic indications
    C. Nonlinear indications
    D. Indications on low-stressed areas of the part
A

A. Indications due to part geometry or part design configurations

18
Q
  1. Which of the statements below best states the results of sandblasting for cleaning surfaces to be penetrant tested?
    A. Discontinuities may be closed
    B. Oil contaminants might be sealed in the discontinuities
    C. The sand used in the sandblasting operation may be forced into the discontinuity
    D. The sandblasting operation may introduce discontinuities into the part
A

A. Discontinuities bay be closed

19
Q 
19. The penetrant indication of a forging lap will normally be a:
A. Round or nearly round indication 
B. Cluster of indications
C. Thin continuous line
D. Dotted line
A

C. Thin continuous line

20
Q
  1. Aluminum alloy test specimens that have been tested by the liquid penetrant method should be throughly cleaned after testing because:
    A. Acid in the penetrant may cause sever corrosion
    B. The alkaline in wet developers and most emulsifiers could cause surface pitting, particularly in moist atmosphers
    C. The oily residue from the test will severely inhibit the application of paint on aluminum alloys
    D. A chemical reaction between the penetrant and aluminum could cause a fire
A

B. The alkaline in wet developers and most emulsifiers could cause surface bitting, particularly in moist atmosphers

21
Q
  1. Which of the following statements is true when using penetrants for leak detection?
    A. Surfaces do not have to be clean
    B. Only one side has to be accessible
    C. Penetrant can be diluted in water for hydro testing
    D. Only visible penetrants can be used
A

C. Penetrant can be diluted in water for hydro testin

22
Q 
22. Which of the following is a discontinuity that might be found in rolled bar stock?
A. Blow holes
B. Shrinkage laps
C. Cracks or seams
D. Insufficient penetration
A

C. Cracks or seams

23
Q
  1. Anodized surfaces are usually considered poor candidates for high sensitive liquid penetrant examination because the anodizing process produces a conversion layer that:
    A. Is extremely smooth and slick
    B. Has a multitude of extremely small pores
    C. May have alkaline residue that “quenches” the penetrant
    D. Cannot be cleaned by ordinary processes
A

B. Has a multitude of extremely small pores

24
Q
  1. Which of the following penetrant methods does not normally require a source of electricity to properly conduct a test?
    A. Water-washable fluorescent penetrant method
    B. Post-emulsified fluorescent penetrant method
    C. Visible dye penetrant method
    D. Hydrophilic Fluorescent penetrant method
A

C. Visible dye penetrant method

25
Q
  1. Which of the following statements is true concerning penetrant testing of welds with rough surfaces?
    A. The post-emulsified process offers advantages of the water-washable process
    B. Welds with rough surfaces may need to be ground smooth prior to penetrant testing
    C. If the solvent removal process is used, the best developer would be an aqueous suspension.
    D. Welds with rough surfaces cannot be successfully tested by any penetrant method
A

B. Welds with rough surfaces may need to be ground smooth prior to penetrant testing

ASNT Study Guide - Chapter 4 (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions