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PT 2 > NDT Q A PT 2 PART 1 > Flashcards

NDT Q A PT 2 PART 1 Flashcards

1
Q
  1. Liquid Penetrant Testing is based on the principle of …
    a) Polarised sound waves in a liquid
    b) Magnetic domains
    c) Absorption of X-rays
    d) Capillary action
A

d) Capillary action

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2
Q
  1. When a small diameter tube is placed in a glass of water, water rises in the tube to a level above the adjacent surface. This phenomenon is due to …

a) Viscosity
b) Capillary action
c) Surface tension
d) Barometric testing

A

b) Capillary action

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3
Q
  1. A penetrant that contains an emulsifier is called …

a) Solvent removable
b) Water washable
c) Post-emulsified
d) Dual method

A

b) Water washable

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3
Q
  1. How is the size of a Liquid Penetrant indication, related to the discontinuity causing it …

a) Larger than
b) Smaller than
c) Equal to
d) Not related to

A

a) Larger than

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4
Q
  1. A penetrant process which employs an emulsifier as a separate step in the penetrant removal process is referred to as…

a) Solvent removable
b) Water washable
c) Post-emulsified
d) Dual method

A

c) Post-emulsified

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5
Q
  1. Which of the following statements is true regarding the capabilities of Liquid Penetrant Testing?

a) Liquid Penetrant Testing is useful for locating subsurface discontinuities in a test piece
b) Liquid Penetrant testing is for locating discontinuities in porous materials
c) Liquid Penetrant testing is useful for locating discontinuities which are open to the surface in non-porous materials
d) None of the above

A

c) Liquid Penetrant testing is useful for locating discontinuities which are open to the surface in non-porous materials

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5
Q
  1. Which of the following discontinuity types could typically be found with a Liquid Penetrant test?

a) Internal slag in a weld
b) Internal slag in a casting
c) Sensitisation in austenitic stainless steel
d) Fatigue cracks

A

d) Fatigue cracks

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6
Q
  1. A penetrant process in which excess penetrant is removed with an organic solvent wipe is called …

a) Solvent removable
b) Water washable
c) Post-emulsified
d) Dual method

A

a) Solvent removable

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7
Q
  1. Which of the following chemical elements are restricted to a minimum in Liquid Penetrant materials?

a) Sulphur
b) Oxygen
c) Carbon
d) Nitrogen

A

a) Sulphur

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8
Q
  1. Which of the following chemical elements are restricted to a minimum in Liquid Penetrant materials?

a) Hydrogen
b) Chlorine
c) Carbon
d) Oil

A

b) Chlorine

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9
Q
  1. Which of the following is the most efficient method of pre-cleaning a test piece prior to penetrant testing?

a) Sand blasting
b) Vapour degreasing
c) Emery cloth
d) Wire brushing

A

b) Vapour degreasing

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10
Q
  1. Which of the following pre-cleaning processes would not be recommended on
    an Aluminium test piece?

a) Detergent cleaning
b) Vapour degreasing
c) Shot blasting
d) Ultrasonic cleaning

A

c) Shot blasting

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11
Q
  1. A wire brush should be used for pre-cleaning …

a) When grease and oil must be removed
b) Only as a last resort
c) When rust is to be removed
d) When grinding burrs must be removed

A

b) Only as a last resort

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12
Q
  1. In a Liquid penetrant testing, a hydrometer is used to measure:

a) Penetrant viscosity
b) Specific gravity of water based wet developers
c) Penetrant specific gravity (water contamination)
d) Solvent Cleaner specific gravity

A

c) Penetrant specific gravity (water contamination)

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13
Q
  1. For adequate test results, the black light used in a fluorescent penetrant examination should provide what minimum black light intensity at the test surface. Which of the following are correct?

a) 100 foot candles per square centimetre
b) 1000 microwatts per square centimetre
c) 800 foot candles
d) 35 microwatts per square centimetre

A

b) 1000 microwatts per square centimetre

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14
Q
  1. What minimum warm up time is required for acceptable performance of a High pressure mercury vapour arc lamp?

a) None
b) 2 minutes
c) 5 minutes
d) 10 minutes

A

d) 10 minutes

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14
Q
  1. Visible contrast, solvent removable penetrants are most advantageous for:

a) inspecting parts with rough surfaces
b) Inspecting batches of small parts
c) Inspecting parts at with relatively smooth surfaces in remote locations
d) Inspecting parts with porous surfaces

A

c) Inspecting parts at with relatively smooth surfaces in remote locations

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15
Q
  1. What is the function of an emulsifier?

a) To remove the excess penetrant
b) To develop indications with a post emulsifiable penetrant system
c) To assist penetration with a post emulsifiable penetrant system
d) To make a solvent removable penetrant water washable

A

d) To make a solvent removable penetrant water washable

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15
Q
  1. If a mercury vapour lamp black light is inadvertently turned off, how soon may it be restarted?

a) Immediately, but wait 15 min before full intensity is reached.
b) 5 minutes
c) 10 minutes
d) 15 minutes

A

d) 15 minutes

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16
Q
  1. The usual colour of fluorescent penetrants …

a) Yellow-green
b) Red
c) Blue
d) Green

A

a) Yellow-green

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17
Q
  1. An oil based emulsifier is called:

a) Hydrophilic
b) Hydrophobic
c) Lipophilic
d) Fluoroscopic

A

c) Lipophilic

18
Q
  1. A water based emulsifier is called …

a) Hydrophilic
b) Hydrophobic
c) Lipophilic
d) Fluoroscopic

A

a) Hydrophilic

19
Q
  1. Which type of emulsifier is designed to be used as a “scrubber”?

a) Hydrophilic
b) Hydrophobic
c) Lipophilic
d) Fluoroscopic

A

a) Hydrophilic

20
Q
  1. Methylene chloride, isopropyl, alcohol, naphtha, trichloroethylene and mineral spirits are examples of …a) Emulsifiers
    b) Developers
    c) Solvent removers
    d) Penetrant base materials
A

c) Solvent removers

21
Q
  1. Which of the following types of solvent removers may be used to clean off excess penetrant when using a solvent removable penetrant?

a) Any organic solvent
b) Only the cleaner recommended by the manufacturer of the penetrant
c) Any alcohol based solvent
d) Only chlorinated hydrocarbon solvents

A

b) Only the cleaner recommended by the manufacturer of the penetrant

22
Q
  1. The most sensitive type developer for detecting fine discontinuities is …

a) Water soluble
b) Nonaqueous wet
c) Dry
d) Water suspendable

A

b) Nonaqueous wet

23
Q
  1. Which of the following is the most sensitive developer in descending order?

a) Dry, water soluble, water suspendable
b) Nonaqueous wet, water soluble, water suspendable, dry
c) Nonaqueous wet, dry, water soluble
d) Water suspendable, water soluble, non aqueous wet

A

b) Nonaqueous wet, water soluble, water suspendable, dry

24
Q
  1. Low sulphur and low chlorine penetrant materials could be used for testing…

a) Aluminium, steel and plastics
b) Tool steels, chrome canadium steel and ferritic stainless steels
c) Austenitic stainless steels, nickel alloys and titanium
d) Magnetic materials

A

a) Aluminium, steel and plastics

25
Q
  1. Which of the following is a pre requirement for penetrant testing?

a) Developer must be applied in a thin, even coat
b) Any surface coatings or soils must be completely removed
c) All traces of penetrant materials should be removed after testing is complete
d) The test object must be non-magnetic

A

b) Any surface coatings or soils must be completely removed

26
Q
  1. Post cleaning is especially important when …a) Post emulsified penetrants are used
    b) Phosphate containing detergents are used
    c) Chlorinated hydrocarbons are used
    d) The test object will be used in a liquid oxygen environment
A

c) Chlorinated hydrocarbons are used

27
Q
  1. Which of the following types of precleaning processes may be used for Liquid Penetrant Testing?

a) Wire brushing only
b) Detergent and water only
c) Vapour degreasing only
d) Any process that leaves the part clean and dry, does not harm the part and is compatible with the penetrant materials

A

d) Any process that leaves the part clean and dry, does not harm the part and is compatible with the penetrant materials

28
Q
  1. Which of the following is the most efficient pre-cleaning process for removal of
    organic soils?
    a) Detergent wash
    b) Vapour degreasing
    c) Steam cleaning
    d) Ultrasonic cleaning
A

d) Ultrasonic cleaning

29
Q
  1. Which of the following pre-cleaning methods may be used with either a solvent or a detergent solution?

a) Ultrasonic cleaning
b) Steam cleaning
c) Detergent wash
d) Vapour degreasing

A

d) Vapour degreasing

30
Q
  1. Which of the following is the danger associated with using a wire brush during
    precleaning?

a) Bristles from the wire brush may cause false indications
b) The wire brush may not adequately remove organic soils
c) The wire brush may close-up or smear metal, especially Aluminium
d) All of the above

A

c) The wire brush may close-up or smear metal, especially Aluminium

31
Q
  1. Which of the following is the preferred method of removing paint prior to performing a Penetrant Test?

a) Sand blast
b) Chemical removers
c) Power wire brush with steel bristles
d) Shot blast

A

b) Chemical removers

32
Q
  1. What additional surface preparation or cleaning must be performed on a machined or ground aluminium casting prior to Penetrant Testing?

a) Vapour degreasing
b) Chemical Etching
c) Detergent wash
d) Nothing

A

b) Chemical Etching

33
Q
  1. Acceptable methods of penetrant application are …a) Spraying
    b) dipping
    c) brushing
    d) All of the above
A

d) All of the above

34
Q
  1. Typical ranges of hydrophilic emulsifier contact times are …

a) 5 to 10 minutes
b) 30 seconds to 2 minutes
c) 1 to 3 minutes
d) 5 to 10 minutes

A

b) 30 seconds to 2 minutes

35
Q
  1. The time period during which penetrant remains on the surface of the test piece is referred to as …

a) Dwell time
b) Soaking time
c) Fixing time
d) Development time

A

a) Dwell time

36
Q
  1. Which of the following is the likely result of incomplete removal of all excess penetrant from the test piece surface?

a) Pooling of the developer in localised areas
b) Formation of non-relevant indications, like background
c) Exaggeration of the size of relevant indications
d) Savings on cleaning materials

A

b) Formation of non-relevant indications, like background

37
Q
  1. Typical ranges of Lipophilic emulsifier contact times are …
    a) 5 to 10 minutes
    b) 5 seconds to 30 seconds
    c) 1 to 3 minutes
    d) 5 to 10 minutes
A

b) 5 seconds to 30 seconds

38
Q
  1. Emulsification times are determined by …

a) Experiment, during technique qualification
b) Manufacturer’s recommendations
c) Both of the above
d) None of the above

A

c) Both of the above

39
Q
  1. Which action is necessary if the penetrant is inadvertently allowed to dry on the test piece?

a) Repeat the test, beginning with the pre-cleaning operation
b) Re-wet the penetrant, begin dwell time again and continue
c) Clean the penetrant off the surface and develop normally
d) Clean the penetrant off the surface, wait 5 minutes and develop normally

A

a) Repeat the test, beginning with the pre-cleaning operation

40
Q
  1. The objective during the excess penetrant removal step is to…

a) Remove all penetrant from the test piece
b) Thoroughly clean the test piece so penetrant material residues do not interfere with the intended use of the piece
c) Remove all penetrant from the test piece surface while leaving penetrant which might be in discontinuities
d) All of the above

A

c) Remove all penetrant from the test piece surface while leaving penetrant which might be in discontinuities

41
Q
  1. During the excess penetrant removal stage of the water washable penetrant process, which of the following is the desired angle of water spray to the test surface?

a) Normal
b) 30 degrees
c) 45 degrees
d) 75 degrees

A

c) 45 degrees

41
Q
  1. Which of the following is the maximum water rinse pressure considered safe for removal of excess penetrant in the water washable penetrant process, without removing any penetrant trapped inside discontinuities?a) 280 kPa for water wash.
    b) 170 kPa for hydro air wash
    c) Both of the above
    d) None of the above
A

c) Both of the above

42
Q
  1. When using a hydrophilic emulsifier, the amount of penetrant removed is most affected by …

a) Solution strength and emulsifier contact time
b) Penetrant dwell time
c) Developer dwell time
d) Adequacy of preclean

A

a) Solution strength and emulsifier contact time

43
Q
  1. Excess penetrant removal is a two step process with, which of the following penetrant methods?

a) Water washable
b) Post emulsifiable
c) Solvent removable
d) Liquid oxygen applications

A

b) Post emulsifiable

44
Q
  1. In the solvent removable penetrant process, excess penetrant is removed with:

a) A water spray
b) A hydrophilic scrubber
c) A solvent spray
d) Clean, lint free towels moistened with solvent

A

d) Clean, lint free towels moistened with solvent

45
Q
  1. Which of the following is normally prohibited as a method of removing excess penetrant from the test surface, when using the solvent removable penetrant process?

a) A water spray
b) A hydrophilic scrubber
c) A solvent spray
d) Clean, lint free towels moistened with solvent

A

c) A solvent spray

PT 2 (8 decks)

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