Sample Specification Questions Wet Magnetic Particle Testing Method Flashcards
- The magnetic particles suspended in the bath shall have:
a. high red iron oxide content
b. low retentivity and low permeability
c. low retentivity and high permeability
d. high permeability and low coerciveness
c. low retentivity and high permeability
- The ammeter is used to:
a. determine the polarity of magnetization
b. determine the amperage being used
c. ensure that the part has been demagnetized
d. measure amp-turns
b. determine the amperage being used
- The field meter is used to determine:
a. magnetic polarity and amperage
b. the comparative strength of field and if
demagnetization is effective
c. retentivity and magnetic permeability
d. both a and b
b. the comparative strength of field and if
demagnetization is effective
- Demagnetization is required:
a. as soon as the part has been cleaned
b. prior to magnetic particle inspection
c. for all parts which are inspected
d. where residual magnetism will interfere with
subsequent processes or usage
d. where residual magnetism will interfere with
subsequent processes or usage
- Part position is varied in the coil when the part
is:
a. over 46 cm (18 in.) in length
b. over 31 cm (12 in.) in length
c. square
d. round
a. over 46 cm (18 in.) in length
- Inspected parts requiring repair must be:
a. reinspected using a sampling plan
b. reinspected following repair
c. inspected with another NDT method
d. made to follow the original fabrication plan
after defect removal is checked and reworked
b. reinspected following repair
- Ultraviolet light intensity requirements specify:
a. a minimum of five minute warm-up
b. that a darkened room be used
c. a minimum of 800 pWIcm2 at the inspection
surface
d. all of the above
c. a minimum of 800 uW/cm2 at the inspection
surface
- The ammeter shall be checked against a
calibration shunt meter:
a. prior to each use
b. at the start of the shift
c. per Procedure M-1
d. per Procedure M-4
c. per Procedure M-1
- Pam will be demagnetized by:
a. banging with a hammer
b. placing within a demagnetizing coil for 30 seconds
c. holding within the demagnetizing mil while
the stepdown transformer moves through its
descending order of amperage shots
d. setting the demagnetizing current at an
amperage higher than the original magnetizing
current and slowly passing the part through the coil
d. setting the demagnetizing current at an amperage higher than the original magnetizing
current and slowly passing the part through the coil
- When magnetizing a part, 31 cm (12 in.) long by 64 mm (2.5 in.) diameter, by placing it within the head stocks and passing an electric current through it, the ammeter should be set at:
a. 900A
b. 1750A
c. 1875A
d. 2200A
d. 2200A
- For demagnetization, the maximum “on” period
should seldom be more than:
a. 5 seconds
b. 30 seconds
c. 120 seconds
d. 240 seconds
b. 30 seconds
- If a pan cannot be fully inspected as required by the drawing:
a. a drawing revision must be issued
b. the part must be scrapped
c. a nonconformance report must be issued
d. the part must be marked with red paint
pending disposition
c. a nonconformance report must be issued
- The sequence of “shots” shall be determined by:
a. accessibility of areas
b. descending order of current
c. ascending order of current
d. this is not an important consideration
c. ascending order of current
- Unless otherwise specified, magnetic particle inspection shall be performed by:
a. the residual method
b. the continuous method
c. both a and b
d. none of the above
b. the continuous method
- Unless otherwise specified, the final magnetic particle inspection shall be performed on parts:
a. prior to final machining but after final heat
treatment
b. after final machining but before final heat
treatment
c. after final machining and beat treatment
d. any time prior to final heat treatment
c. after final machining and beat treatment
- The extent of magnetic particle inspection should
be specified:
a. in the procedure
b. in the drawings and in the purchase order
c. in the acceptance standard
d. by normal shop practice
b. in the drawings and in the purchase order
- The technique sheet shall be approved by:
a. a Level II
b. a Level III
c. no one; techniques used do not need to be
approved
d. a Level II and the client
b. a Level III
- If the magnetizing current is not specified, the magnetizing current should be determined by:
a. experimentation and then recorded on the
technique sheet
b. the cognizant engineer
c. the client
d. the technician’s experience
a. experimentation and then recorded on the
technique sheet
- Nonrelevant indications:
a. have no bearing on the suitability of the part
for service
b. shall be reexamined to determine whether an
actual defect exists
c. must be completely removed
d. both a and b must be considered
d. both a and b must be considered
- The intensity of the ultraviolet light shall be
measured using a:
a. Light meter with a 10X multiplier disc
b. Light meter with an amber field filter
c. light meter set at 343 nm (3425 A)
d. light meter with an M2 rating
a. Light meter with a 10X multiplier disc
- A part being demagnetized should be slowly
removed from the magnetic field in a straight line for a distance of:
a. 31 cm (1 ft)
b. 61 cm (2 ft)
c. 122 cm (4 ft)
d. the distance is not important
c. 122 cm (4 ft)
- Records of inspection shall be maintained:
a. for the life of the part
b. for 40 years
c. for 7 years
d. until the client accepts the part
c. for 7 years
- A field indicator shall be used to determine the :
a. amount of residual magnetism remaining in a Part
b. orientation of the magnetic field
c. overall vector component of the magnetic field
d. outer limit of magnetic field
a. amount of residual magnetism remaining in a Part
- The part shall be post-cleaned:
a. by rinsing it with acetone
b. by wiping it with a dry cloth
c. by wiping it with a cloth soaked in base oil
“c”
d. this is not a provision of the procedure
c. by wiping it with a cloth soaked in base oil
“c”
- Demagnetization may often be improved by the use of:
a. the DC surge technique
b. insulated paramagnetic rails
c. the ‘Transient Current Method”
d. a booster-type demagnetizer
c. the ‘Transient Current Method”
