Article - 7 (MT) Flashcards Preview

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Flashcards in Article - 7 (MT) Deck (8):
1

PROD TECHNIQUE:
Direct or rectified magnetizing current shall be used. The current shall be 1 0 0 ( m i n i mu m ) a m p / i n . t o 125 (maximum) amp/in. of prod spacing for sections ____________

3/4 in. (19 mm) thick or greater

2

PROD TECHNIQUE:
Direct or rectified magnetizing current shall be used. The current shall be 90 ( m i n i mu m ) a m p / i n . t o 110 (maximum) amp/in. of prod spacing for sections ____________

less than 3/4 in. (19 mm) thick

3

Prod spacing shall not exceed ______, but prod spacings of less than _____ due to banding of the particles around the prods

8 in.
3 in.

4

Magnetizing equipment with an ammeter shall be calibrated at least ___________________

once a year

5

Each alternating current electromagnetic yoke shall
have a lifting power of at least _______ at the maximum pole spacing that will be used.

10 lb

6

Each direct current or permanent magnetic yoke
shall have a lifting power of at least __________ at the
maximum pole spacing that will be used.

40 lb

7

Direct visual examination may usually be made when access is sufficient to place the eye within _______of the surface to be examined and at an angle not less than ________ to the surface to be examined

24 in.
30 deg

8

AC yokes must be able to lift______pounds at a maximum spacing of_______.

10 lb
8 in. or 1 1/2 feet