A welding machine that produces an almost horizontal output slope is

A welding machine that produces an almost horizontal output slope is

• A. Constant Current Machine.
• B. Constant Voltage Machine.
• C. Rising Arc Voltage Machine.
• D. High Amperage Welding Machine.

Answer: (B)

In welding power sources, the shape of the output when you change current tells you how the voltage behaves. An almost horizontal output slope means the arc voltage stays nearly the same as you increase or decrease current. That is the hallmark of a constant voltage power source, which is designed to keep the arc voltage steady across a wide current range. A constant current machine, by contrast, holds the current constant and lets the arc voltage vary with arc length, so the voltage would not be flat as current changes. A machine described as rising arc voltage would show the voltage increasing with current, giving an upward slope. A high amperage machine describes capability, not how the voltage behaves with current.

In welding power sources, the shape of the output when you change current tells you how the voltage behaves. An almost horizontal output slope means the arc voltage stays nearly the same as you increase or decrease current. That is the hallmark of a constant voltage power source, which is designed to keep the arc voltage steady across a wide current range.

A constant current machine, by contrast, holds the current constant and lets the arc voltage vary with arc length, so the voltage would not be flat as current changes. A machine described as rising arc voltage would show the voltage increasing with current, giving an upward slope. A high amperage machine describes capability, not how the voltage behaves with current.