Which statement about the purpose of a two-wire continuity test is correct?

• A. To measure the signal strength of the line.
• B. To verify the line's insulation resistance.
• C. To confirm the circuit is intact.
• D. To determine the color coding of wires.

Answer: (C)

Two-wire continuity testing is about whether there is a complete conductive path between the two conductors. When the path is intact, current can flow and the tester shows continuity (a beep or a low resistance). If there’s a break or open in the line, the circuit isn’t closed and the tester indicates no continuity.

This is why it’s the right purpose: it directly confirms that the circuit is intact and capable of carrying a signal. It’s not about measuring how strong a signal is, nor about checking insulation resistance (that’s a different test, usually with higher voltage to detect leakage), and it doesn’t determine wire color coding—that’s for identification and wiring diagrams.