New York State Master Electrician Practice Exam

Which appliance requires the highest power in kW as listed in the multi-family building example?

1. Washing Machine

2. Water Heater

3. Range

4. A/C (3 hp)

The correct answer is: Range

In the context of appliances used in a multi-family building, the range typically requires the highest power, particularly when considering its cooking capabilities. Ranges often have several burners, an oven, and sometimes additional features like broilers, all of which can draw significant electrical power when used. When analyzing the others, the washing machine generally operates on a lower power level, typically around 0.5 to 2 kW depending on its efficiency and features. Water heaters, while they can consume a considerable amount of power, usually operate at approximately 3 to 4 kW. The A/C unit, rated at 3 hp, translates to around 2.2 kW; although this is substantial, it is often less than what a fully loaded electric range can demand. The range's ability to simultaneously utilize multiple elements and the oven makes its power requirements quite high. Therefore, when evaluating all the appliances listed, the range is justified as the one requiring the highest power in kW.