Which of the following is the horsepower equivalent of 746 watts?

The horsepower equivalent of 746 watts is indeed 1 HP. Horsepower is a unit of measurement for power, commonly used to describe the output of engines and motors. In specific terms, one mechanical horsepower is defined as exactly 746 watts.

This equivalence is significant because it allows for the conversion of power ratings in different contexts, such as in mechanical systems, where power might be expressed in watts or horsepower depending on industry standards. Therefore, any reference to 746 watts is directly related to the definition of 1 HP, which is why that choice is the correct answer in this context.

The other choices represent different values of horsepower. For instance, 0.5 HP would equal 373 watts, 2 HP would equal 1492 watts, and 3 HP would equal 2238 watts. These values demonstrate a clear relationship where they are either fractions or multiples of the defined 746 watts per horsepower, which underscores that 1 HP is uniquely defined by this wattage.