Question 68 ONC02 - Second Mate/Third Mate Unlimited Tonnage

The Correct Answer is B **Why option B ("G") is correct:** The component indicated by the letter 'G' is the tripping palm. In electrical and mechanical systems, particularly in circuit breakers or protective relays, the tripping palm is a crucial part of the trip mechanism. It is typically a small lever or projection that, when activated (e.g., by an overload, short circuit, or manual trigger), physically pushes or releases the latch holding the main contacts closed, thereby causing the device to trip and interrupt the current flow. **Why the other options are incorrect:** * **A) F:** The letter 'F' typically indicates the movable contact or the moving arm assembly that holds the movable contact in this type of illustration. It is not the tripping palm. * **C) H:** The letter 'H' points to the fixed contact, which remains stationary when the circuit is opened or closed. It is a part of the main current path but is not the tripping mechanism. * **D) J:** The letter 'J' often indicates the armature or the electromagnet core (or potentially a portion of the thermal element) in an overcurrent protection device. While this component interacts with the tripping palm, it is the actuator, not the palm itself.