đ Key Concepts
⢠Review how a normally open (NO) contact is drawn versus a normally closed (NC) contact in standard control schematics.
⢠Recall that a limit switch is a mechanically actuated switch (cam, lever, or plunger operated), and its symbol usually shows some kind of mechanical actuator next to the contact.
⢠Look at which symbols show a plain contact versus a contact that is positionâsensing / camâoperated, and note which of those is drawn in the open position.
đ Think About
⢠Among choices 5, 7, 12, and 13, first eliminate any symbol that clearly is not a contact (for example, one that looks like a heater or resistor rather than a switch).
⢠Of the remaining symbols that are contacts, decide which are simple NO contacts (like a basic pushbutton) and which show an actuating lever or cam that would make it a limit switch.
⢠Check which of those limitâtype symbols is drawn with the contacts separated (open) in the normal, unoperated position.
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Before You Answer
⢠Make sure the symbol you choose actually represents switch contacts, not a heater, resistor, or other device.
⢠Confirm that the contact is normally open â the line should be broken in the rest position, not touching.
⢠Verify that there is some indication of mechanical actuation (a lever, cam, or similar marking) to distinguish it as a limit switch, not just a regular NO pushbutton.