MAGNETIC PARTICLE TESTING (SPECIFIC) SET 1

1.      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

2.      According to ASTM E709-95 when dry particles are used magnetic particle testing shall not be performed on the surface of parts whose temperature exceeds:

• (a)      57ºC

• (b)      79ºC

• (c)      158ºC

• (d)      136ºC

3.      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

4.  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

5.  According to ASTM E709-95 in using prod technique on a 50 mm thickness plate with a prod spacing of 101 mm (4 inches), current shall be selected in the following range:

• (a)      300-450 A

• (b)      400-500 A

• (c)      500-625 A

• (d)      550-700 A

6.       According to ASMT E709-95 alternating current electromagnetic yokes should give a lifting force of at least:

• (a)      1.5 kg

• (b)      2.5 kg

• (c)      3.5 kg

• (d)      4.5 kg

7.      According to ASTM E709-95 direct current electromagnetic yokes should have a lifting force of at least:

• (a)      15 kg

• (b)      16 kg

• (c)      17 kg

• (d)      18 kg

8.   According to ASTM E709-95 the UV light shall be centred on (1 Å = 10-10m):

• (a)      3000 Å

• (b)      3250 Å

• (c)      3400 Å

• (d)      3650 Å

9.       According to ASTM E709-95 when fluorescent particles are used, the UV light intensity shall be above:

• (a)      700 µW/cm2

• (b)      800 µW/cm2

• (c)      900 µW/cm2

• (d)      1000 µW/cm2

10.       According to ASTM E709-95 when fluorescent particles are used, the bulb shall be warmed up prior to use for at least:

• (a)      1 min

• (b)      2 min

• (c)      3 min

• (d)      4 min

• (e)      5 min