Conventional MPI Question & Answers_Specific

1. MAGNETIC PARTICLE TESTING
LEVEL-II
SPECIFIC
(Solve question 1 to 5 according to given documents)
1. According to Article 7 method of examination should be done by :
a. Residual magnetism
b. Continuous magnetism
c. Partially magnetism
d. Any of the above
2. The article 7 describes the testing done by:
a. Only with wet fluorescent particles
b. Only with dry particles
c. Either wet or dry and may be either fluorescent or non-fluorescent
d. None of the above
3. By article 7 , each piece of magnetizing equipment with an ammeter shall be
calibrated at least :
a. One time per six months
b. Every week
c. Once year or whenever equipment has been subjected to major electric
repair, periodic overhaul or damage
d. Every month
4. According to appendix 6 examiner should have vision capability of
a. Reading Jaeger type No. 1 ,from distance not less than 12 inch
b. Reading Jaeger type No. 2 ,from distance not less than 12 inch
c. Reading Jaeger type No. 1 ,from distance not less than 15 inch
d. Reading Jaeger type No. 2 ,from distance not less than 15 inch
e. None of the above
5. Examiner found three relevant rounded indications distance between each
indication is 1.4 mm, according to appendix 6 this indication is:
a. Accepted
b. Rejected
c. Accepted if indication is below the surface
d. More information required
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2. MAGNETIC PARTICLE TESTING
LEVEL-II
6. When carrying out magnetic particle inspection, flux density is generated into the
ferromagnetic material being inspected. One unit of flux density is the gauss. How
many Weber per square meter equal one gauss?
a. 0.72
b. 10-4
c. 2 x 10-6
d. 0.00072
7. The right hand rule shows which of the following relationships?
a. Electron flow from negative to positive with a magnetic field parallel
to the current flow
b. Current flow from negative to positive with a magnetic field
perpendicular to the current flow
c. Electron flow from positive to negative with a magnetic field parallel
to the current flow
d. Current flow from positive to negative with a magnetic field
perpendicular to the current flow
8. A ferromagnetic material with a steep initial curve will have which of the
following properties?
a. Low permeability
b. Low coercivity
c. High reluctance
d. The material will have all of the above properties
9. When magnetizing with alternating current, a lagging effect occurs where by the
magnetic flux density within the material lags behind the applied magnetizing
force. What is this phenomena called?
a. Retentivity
b. Reluctance
c. Hysteresis
d. Permeability
10. Direct induction will always generate which of the following types of magnetic
field?
a. Circular
b. Longitudinal
c. Vectored
d. All the above could be generated
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3. MAGNETIC PARTICLE TESTING
LEVEL-II
11. The Curie point is the temperature at which a ferromagnetic material will become
paramagnetic and as such loose its high susceptibility to magnetization. What is
the Curie point temperature for cobalt?
a. 770 Degrees Fahrenheit
b. 1130 Degrees Fahrenheit
c. 770 Degrees Celsius
d. 1130 Degrees Celsius
12. The magnetic flux lines which flow through a bar magnet form closed loops but
can be broken by which of the following?
a. A change in permeability
b. A non metallic inclusion
c. A crack
d. None of the above will cause a break in a flux line
13. The earth itself has a magnetic effect which can affect ferromagnetic materials.
Which of the following best describes this magnetic effect?
a. Mono-Polar
b. Bi-Polar
c. Multi-Polar
d. Circular Magnetic Fields
14. A fault in magnetized material will best be detected when it lies in which of the
following directions?
a. Parallel to the magnetic field
b. Perpendicular to the magnetic field
c. Parallel to the magnetizing current
d. Perpendicular to the magnetizing force
e. Both parallel to the magnetic field and perpendicular to the
magnetizing force
f. Both perpendicular to the magnetic field and parallel to the
magnetizing current
15. A change in which property of between the material being inspected and the
discontinuity to be detected generates flux leakage?
a. Conductivity
b. Permeability
c. Oxidization
d. Hysteresis
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4. MAGNETIC PARTICLE TESTING
LEVEL-II
16. Which of the following materials would be considered to be having permeability
much greater than that of air?
a. Aluminium
b. Bismuth
c. Zinc
d. Gadolinium
e. None of the above have a permeability much greater than air
17. Which of the following flux leakage curvatures will have the greatest attraction
for magnetic particles?
a. Low Curvature
b. No Curvature
c. Highly curved
d. Curvature has no effect on magnetic particle attraction
18. A discontinuity which generates flux leakage on the surface of a ferromagnetic
material will have a high factor for which of the following properties?
a. Permeability
b. Reluctance
c. Retentivity
d. Both reluctance and Retentivity
19. Which of the following describes a Hall Effect Element Sensor?
a. Two coils placed mutually perpendicular
b. A P-N junction within a semi-conductor
c. Current carrying semi-conductor crystals
d. Coils wound around cylindrical ferrite
20. Which of the following materials will have the largest relative permeability value?
a. 0.9% Carbon
b. Nickel (99% annealed)
c. Cobalt (99% annealed)
d. Aluminium
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5. MAGNETIC PARTICLE TESTING
LEVEL-II
1. b 11. d
2. c 12. d
3. c 13. b
4. b 14. f
5. b 15. b
6. b 16. d
7. b 17. c
8. b 18. b
9. c 19. c
10. a 20. b
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6. MAGNETIC PARTICLE TESTING
LEVEL-II
1. b 11. d
2. c 12. d
3. c 13. b
4. b 14. f
5. b 15. b
6. b 16. d
7. b 17. c
8. b 18. b
9. c 19. c
10. a 20. b
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