The arm in the relay is connected to what?

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Get ready for the Amtrak Signal Maintenance Training – Level 1 (SMT-1) Test. Study with flashcards and multiple choice questions, each question with hints and explanations. Ace your exam!

Multiple Choice

The arm in the relay is connected to what?

Explanation:
The moving arm works by swinging around a pivot, so it’s connected to a hinge. When the coil is energized, the magnetic field pulls the armature, and because the arm is mounted on a hinge, it can rotate to open or close the relay contacts. The coil provides the magnetic force, and the frame is the fixed support; neither is the connection that lets the arm move.

The moving arm works by swinging around a pivot, so it’s connected to a hinge. When the coil is energized, the magnetic field pulls the armature, and because the arm is mounted on a hinge, it can rotate to open or close the relay contacts. The coil provides the magnetic force, and the frame is the fixed support; neither is the connection that lets the arm move.

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