Welding Polarity — Definition Check A DC welding setup is said to have reversed polarity when the work is connected to the negative terminal and the electrode holder to the positive terminal. Choose the correct response.

Introduction / Context:
In direct-current (DC) arc welding, polarity affects heat distribution and penetration because electrons flow from negative (cathode) to positive (anode). Correct identification of “straight” versus “reverse” polarity is crucial for electrode and job selection.

Given Data / Assumptions:

• DC welding power source is used.
• Work connection and electrode connection are specified.
• Standard terminology: DCEN and DCEP.

Concept / Approach:
DC straight polarity (DCEN) means electrode negative, work positive. DC reverse polarity (DCEP) means electrode positive, work negative. In DCEP, about two-thirds of the heat is at the positive terminal (electrode), influencing bead shape and penetration differently than DCEN.

Step-by-Step Solution:
Identify given connection: work negative, electrode positive.Map to terminology: electrode positive → DCEP.DCEP is conventionally called reversed polarity.Therefore, the statement is correct.

Verification / Alternative check:
Electrode manufacturer datasheets specify whether to use DCEN or DCEP for optimal arc characteristics; DCEP corresponds to reversed polarity.

Why Other Options Are Wrong:
Disagree: contradicts accepted welding terminology.AC: polarity alternates; “reverse” is a DC concept.TIG/cellulose-only qualifiers are unnecessary; the definition is general for DC arc welding.

Common Pitfalls:
Confusing heat concentration at positive terminal with penetration trends for specific processes and electrodes.

Final Answer:
Agree