The ideal OFF resistance of a relay is
A) 0 ?. B) 1 M?. C) infinite ?. D) 10 ?.
C
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In OA welding and TB, a high-temperature flame is produced at the torch tip by burning oxygen and a fuel ____________________.
Fill in the blank(s) with the appropriate word(s).
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Compared to the stator's magnetic field, the rotor's magnetic field is:
A) Opposite in polarity. B) Similar in polarity. C) Fixed instead of varying. D) Much stronger.
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On a bearing that has been shock loaded, the race of the bearing can be dented. This type of bearing failure is called _______
A) Arcing B) Fluting C) Brinelling D) Spalling
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What type of fire extinguisher would be used on an electric motor that has overheated and caught fire?