PAC is different than OFC in that PAC is an all electrical process.

• A. Not sure
• B. True
• C. False
• D. Partly

Answer: (B)

Plasma arc cutting uses electricity to create a plasma jet that cuts the metal. An electric arc ionizes a gas, and the resulting high-temperature plasma melts and blows away the metal. Because the heat comes from electrical energy turning into plasma, PAC is an all-electrical process.

Oxy-fuel cutting relies on a flame produced by burning fuel gas with oxygen. The heat from combustion melts the metal and the jet of oxygen blows the molten metal away. There’s no electric arc involved in the cutting action.

So the statement is true: PAC is different from OFC because PAC uses electrical energy to generate the cutting heat, while OFC uses chemical energy from combustion. The other options don’t fit because they’d contradict the clear energy-source difference.