HOLT Electricians Practice Exam

Which motor is considered the highest rated among the following options?

1. 10 horsepower, 3 phase, 208 volts

2. 5 horsepower, single-phase, 208 volts

3. 3 horsepower, single phase, 120 volts

4. 1 horsepower, single phase, 120 volts

The correct answer is: 3 horsepower, single phase, 120 volts

The highest rated motor in this scenario is indeed the 10 horsepower, 3 phase, 208 volts option. When assessing motors, the power rating measured in horsepower is crucial because it indicates the motor's output power. The 10 horsepower motor has the highest rating among the options listed, significantly surpassing the others in terms of power output. A 3 phase motor is also typically able to handle larger loads and operate more efficiently than single-phase motors, which often have limitations on the load they can manage. In contrast, the remaining options—5 horsepower, 3 horsepower, and 1 horsepower—are all lower in terms of horsepower ratings. The difference in power output directly impacts the motor's application in industrial or commercial settings; therefore, the 10 horsepower motor is appropriate for larger tasks requiring substantial electrical motor capabilities. Evaluating the provided choices, it is evident that the motor rated at 10 horsepower is the superior option for high-performance needs.