Top 80+ Solved Magnetic Particle Testing Level 2 MCQ Questions Answer
Q. A leakage field is strongest when a discontinuity interrupts the magnetic flux lines atan angle of:
a. 0o
b. 45o
c. 90o
d. 180o
Q. A common rule of thumb to use for current required in circular magnetisation:
a. 1000 amps/25 mm of diameter
b. 1000 ampere-turns/25 mm of diameter
c. 1000 amps/25 mm of prod spacing
d. None of the above
Q. The formula, NI = 45000/(L/D), is used to calculate the proper magnetising currentfor:
a. Prod magnetisation
b. A head shot
c. A central conductor
d. Coil magnetization
Q. For direct contact magnetising methods, the magnetic field is oriented in whatdirection relative to the current direction?
a. Parallel
b. At 45o
c. At 90o
d. At 180o
Q. For direct contact magnetising methods, current should be flowing in what directionrelative to expected discontinuities?
a. Parallel
b. At 45o
c. At 90o
d. At 180o
Q. What is the magnetic field strength at the surface of a 25 mm diameter bar as comparedto that at the surface of a 50 mm diameter bar, each carrying 1000 amps of current?
a. Twice
b. One half
c. One quarter
d. Four times
Q. Demagnetization, ASTM E709-95 recommends a coil of ampere-turns:
a. 1000 to 3000
b. 3000 to 5000
c. 5000 to 10000
d. 10000 to 15000
Q. According to ASTM E709-95 in using prod technique, prod spacing shall not exceed:
a. 50 mm
b. 100 mm
c. 150 mm
d. 200 mm
Q. According to ASTM E709-95, the UV intensity shall not be less than:
a. 600 µW/cm2
b. 700 µW/cm2
c. 800 µW/cm2
d. 900 µW/cm2
Q. According to ASTM E709-95 in using prod technique on a 50 mm thickness plate witha prod spacing of 101 mm (4 inches), current shall be selected in the following range:
a. 300-450A
b. 400-500 A
c. 500-625A
d. 550-700 A
Q. According to ASMT E709-95 alternating current electromagnetic yokes should give alifting force of at least:
a. 1.5 kg
b. 2.5 kg
c. 3.5 kg
d. 4.5 kg
Q. According to ASTM E709-95 direct current electromagnetic yokes should have a liftingforce of at least:
a. 15 kg
b. 16 kg
c. 17 kg
d. 18 kg
Q. According to ASTM E709-95 the UV light shall be centred on (1 Å = 10-10m):
a. 3000Å
b. 3250 Å
c. 3400Å
d. 3650 Å
Q. According to ASTM E709-95 when fluorescent particles are used, the UV lightintensity shall be above:
a. 700 µW/cm2
b. 800 µW/cm2
c. 900 µW/cm2
d. 1000 µW/cm2