ETSI Daniel Gomez
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Test de Practica

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ETSI Daniel Gomez
Created by ETSI Daniel Gomez over 9 years ago
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Proyecto PT.1 (1-50)

Question 1 of 50

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1. Liquid penetrant testing is based on the principle of:

Select one of the following:

  • (a) Polarized sound waves in a liquid

  • (b) Magnetic domains

  • (c) Absorption of X rays

  • (d) Capillary action

Explanation

Question 2 of 50

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2. 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 is called:

Select one of the following:

  • (a) Viscosity

  • (b) Capillary action

  • (c) Surface tension

  • (d) Barometric testing

Explanation

Question 3 of 50

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3. How is the size of a liquid penetrant indication usually related to the discontinuity it represents:

Select one of the following:

  • (a) Larger than

  • (b) Smaller than

  • (c) Equal to

  • (d) Not related to

Explanation

Question 4 of 50

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4. A penetrant that is self-emulsifying is called:

Select one of the following:

  • (a) Solvent removable

  • (b) Water washable

  • (c) Post-emulsified

  • (d) Dual sensitivity method

Explanation

Question 5 of 50

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5. A penetrant process which employs an emulsifier as a separate step in the penetrant removal process is called:

Select one of the following:

  • (a) Solvent removable

  • (b) Water washable

  • (c) Post-emulsified

  • (d) Dual sensitivity method

Explanation

Question 6 of 50

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6. A penetrant process in which excess penetrant is removed with an organic solvent is called:

Select one of the following:

  • (a) Solvent removable

  • (b) Water washable

  • (c) Post-emulsified

  • (d) Dual method

Explanation

Question 7 of 50

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7. Which of the following statements accurately describes the capabilities of liquid penetrant testing?

Select one of the following:

  • (a) Liquid penetrant testing is useful for locating subsurface discontinuities in a test piece

  • (b) Liquid penetrant testing is useful 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

Explanation

Question 8 of 50

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8. Which of the following discontinuity types could typically be found with a liquid penetrant test?

Select one of the following:

  • (a) Internal slag in a weld

  • (b) Internal slag in a casting

  • (c) Sensitization in austenitic stainless steel

  • (d) Fatigue cracks

Explanation

Question 9 of 50

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9. Which of the following chemical elements are normally held to a minimum in liquid penetrant materials, when testing stainless steel and titanium?

Select one of the following:

  • (a) Hydrogen

  • (b) Chlorine

  • (c) Carbon

  • (d) Oil

Explanation

Question 10 of 50

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10. Which of the following chemical elements are normally held to a minimum in liquid penetrant materials when testing nickel based alloys?

Select one of the following:

  • (a) Sulphur

  • (b) Oxygen

  • (c) Carbon

  • (d) Nitrogen

Explanation

Question 11 of 50

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11. Which of the following is the most desirable method of pre-cleaning a test piece prior to penetrant testing?

Select one of the following:

  • (a) Sand blasting

  • (b) Vapour degreasing

  • (c) Emery cloth

  • (d) Wire brushing

Explanation

Question 12 of 50

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12. Which of the following pre-cleaning processes is not recommended?

Select one of the following:

  • (a) Detergent cleaning

  • (b) Vapour degreasing

  • (c) Shot blasting

  • (d) Ultrasonic cleaning

Explanation

Question 13 of 50

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13. A wire brush should be used for pre-cleaning:

Select one of the following:

  • (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

Explanation

Question 14 of 50

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14. A hydrometer is used to measure:

Select one of the following:

  • (a) Penetrant viscosity

  • (b) Specific gravity of water based wet developers

  • (c) Penetrant specific gravity

  • (d) Cleaner specific gravity

Explanation

Question 15 of 50

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15. Visible, solvent removable penetrants are most advantageous for:

Select one of the following:

  • (a) Inspecting parts with rough surfaces

  • (b) Inspecting batches of small parts

  • (c) Inspecting parts at remote locations

  • (d) Inspecting parts with porous surfaces

Explanation

Question 16 of 50

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16. For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface?

Select one of the following:

  • (a) 100 foot candles per square centimetre

  • (b) 1000 microwatts per square centimetre

  • (c) 800 foot candles

  • (d) 35 microwatts per square centimetre

Explanation

Question 17 of 50

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17. What minimum warm-up time is required for acceptable performance of a mercury Vapour arc black light?

Select one of the following:

  • (a) None

  • (b) 2 minutes

  • (c) 5 minutes

  • (d) 10 minutes

Explanation

Question 18 of 50

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18. Which of the following penetrants contains an emulsifying agent?

Select one of the following:

  • (a) Solvent removable

  • (b) Water washable

  • (c) Post emulsifiable

  • (d) Fluorescent

Explanation

Question 19 of 50

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19. Which of the following penetrants must be treated with an emulsifier prior to water removal?

Select one of the following:

  • (a) Solvent removable

  • (b) Water washable

  • (c) Post emulsifiable

  • (d) Fluorescent

Explanation

Question 20 of 50

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20. What is the function of an emulsifier?

Select one of the following:

  • (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 post emulsifiable penetrant water washable

Explanation

Question 21 of 50

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21. An oil based emulsifier is called:

Select one of the following:

  • (a) Hydrophilic

  • (b) Hydrophobic

  • (c) Lipophilic

  • (d) Fluoroscopic

Explanation

Question 22 of 50

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22. A water based emulsifier is called:

Select one of the following:

  • (a) Hydrophilic

  • (b) Hydrophobic

  • (c) Lipophilic

  • (d) Fluoroscopic

Explanation

Question 23 of 50

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23. Methylene chloride, isopropyl, alcohol, naptha and mineral spirits are examples of:

Select one of the following:

  • (a) Emulsifiers

  • (b) Developers

  • (c) Solvent removers

  • (d) None of the above

Explanation

Question 24 of 50

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24. What type of solvent removers may be used with a solvent removable penetrant?

Select one of the following:

  • (a) Any organic solvent

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

  • (c) Any alcohol based solvents

  • (d) Only chlorinated hydrocarbons

Explanation

Question 25 of 50

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25. Which of the following is a prerequisite for a penetrant test?

Select one of the following:

  • (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

Explanation

Question 26 of 50

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26. Which of the following types of pre-cleaning processes may be used for liquid penetrant testing?

Select one of the following:

  • (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

Explanation

Question 27 of 50

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27. What is the likely result of incomplete removal of all excess penetrant from the test piece surface?

Select one of the following:

  • (a) Formation of false indications

  • (b) Formation of relevant indications

  • (c) Exaggeration of the size of relevant indications

  • (d) None of the above

Explanation

Question 28 of 50

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28. What is the preferred pre-cleaning process for removal of oil and grease :

Select one of the following:

  • (a) Steam cleaning with a added acid

  • (b) Vapour degreasing

  • (c) Steam cleaning

  • (d) Ultrasonic cleaning

Explanation

Question 29 of 50

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29. Which pre-cleaning method may be used with either a solvent or a detergent solution?

Select one of the following:

  • (a) Ultrasonic cleaning

  • (b) Steam cleaning

  • (c) Detergent wash

  • (d) Vapour degreasing

Explanation

Question 30 of 50

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30. What is the danger associated with using a wire brush during pre-cleaning?

Select one of the following:

  • (a) Bristles from the wire brush may cause false indications

  • (b) Contaminants from the wire brush may cause delayed hydrogen cracking of high carbon steels

  • (c) The wire brush may not adequately remove organic soils

  • (d) The wire brush may close or smear metal over

Explanation

Question 31 of 50

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31. What is the preferred method of removing paint prior to performing a penetrant testing?

Select one of the following:

  • (a) Sand blast

  • (b) Chemical removers

  • (c) Power wire brush

  • (d) Shot blast

Explanation

Question 32 of 50

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32. What additional surface preparation or cleaning must be performed on a machined or ground aluminium casting prior to penetrant testing?

Select one of the following:

  • (a) Vapour degreasing

  • (b) Etching

  • (c) Detergent wash

  • (d) Nothing

Explanation

Question 33 of 50

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33. Acceptable methods of penetrant application are:

Select one of the following:

  • (a) Spraying

  • (b) Dipping

  • (c) Brushing

  • (d) All of the above

Explanation

Question 34 of 50

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34. The time period during which penetrant remains on the surface of the test piece is called:

Select one of the following:

  • (a) Dwell time

  • (b) Soaking time

  • (c) Fixing time

  • (d) Development time

Explanation

Question 35 of 50

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35. Excess penetrant removal is a two step process with which of the following penetrant methods?

Select one of the following:

  • (a) Water washable

  • (b) Post emulsifiable

  • (c) Solvent removable

  • (d) Liquid oxygen applications

Explanation

Question 36 of 50

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36. A developer aids penetrant bleed out because of:

Select one of the following:

  • (a) Adequate removal of the excess penetrant

  • (b) Providing a contrasting background for visible dye indications

  • (c) Capillary action

  • (d) Proper emulsifier action

Explanation

Question 37 of 50

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37. In the solvent removable penetrant process, excess penetrant is removed with:

Select one of the following:

  • (a) A water spray

  • (b) A hydrophilic scrubber

  • (c) A solvent spray

  • (d) Clean, lint free towels slightly moistened with solvent

Explanation

Question 38 of 50

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38. Water based wet developer is applied:

Select one of the following:

  • (a) Immediately before removal of excess penetrant

  • (b) Immediately after removal of excess penetrant

  • (c) After a drying period following removal of excess penetrant

  • (d) For maximum sensitivity results

Explanation

Question 39 of 50

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39. Non-aqueous wet developer is applied:

Select one of the following:

  • (a) Immediately before removal of excess penetrant

  • (b) Immediately after removal of excess penetrant

  • (c) After the excess penetrant is removed and part surface is dried

  • (d) For maximum sensitivity results

Explanation

Question 40 of 50

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40. Dry developer is applied:

Select one of the following:

  • (a) Immediately before removal of excess penetrant

  • (b) Immediately after removal of excess penetrant

  • (c) After drying of the part

  • (d) For maximum sensitivity results

Explanation

Question 41 of 50

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41. Typical ranges of emulsifier dwell times are:

Select one of the following:

  • (a) 5 to 10 minutes

  • (b) 30 seconds to 1 minute

  • (c) 1 to 3 minutes

  • (d) 5 to 10 minutes

Explanation

Question 42 of 50

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42. Actual emulsification times are determined by:

Select one of the following:

  • (a) Experiment, during technique qualification

  • (b) Manufacturer's recommendations

  • (c) Code requirements

  • (d) None of the above

Explanation

Question 43 of 50

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43. The colour of fluorescent penetrant under the presence of a UV light is:

Select one of the following:

  • (a) Yellow-green

  • (b) Red

  • (c) Blue

  • (d) Green

Explanation

Question 44 of 50

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44. What action is necessary if the penetrant is inadvertently allowed to dry on the test piece?

Select one of the following:

  • (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

Explanation

Question 45 of 50

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45. What maximum water rinse pressure is considered safe for removal of excess penetrant in the water washable penetrant process?

Select one of the following:

  • (a) As low a pressure as possible, 50 PSI maximum

  • (b) to 200 PSI

  • (c) PSI maximum

  • (d) to 500 PSI

Explanation

Question 46 of 50

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46. During the water rinse step of the water washable penetrant process, what is the desired angle of the spray to the surface?

Select one of the following:

  • (a) Normal

  • (b) 30 degrees

  • (c) 45 degrees

  • (d) 75 degrees

Explanation

Question 47 of 50

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47. Which type of emulsifier is designed to be used as a ‘scrubber’?

Select one of the following:

  • (a) Hydrophilic

  • (b) Hydrophobic

  • (c) Lipophilic

  • (d) Fluoroscopic

Explanation

Question 48 of 50

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48. Post cleaning is especially important when:

Select one of the following:

  • (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

Explanation

Question 49 of 50

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49. When using a hydrophilic emulsifier, the amount of penetrant removed is most affected by:

Select one of the following:

  • (a) Solution strength and time of spray

  • (b) Penetrant dwell time

  • (c) Emulsifier dwell time

  • (d) Adequacy of pre-clean

Explanation

Question 50 of 50

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50. If a mercury vapour arc black light is inadvertently turned off, how soon may it be restarted?

Select one of the following:

  • (a) Immediately

  • (b) 5 minutes

  • (c) 10 minutes

  • (d) 15 minutes

Explanation