High torque motors are of this duty type.

• A. Intermittent
• B. Continuous
• C. Unlimited
• D. Heavy-duty

Answer: (A)

High torque requires a high current, which means more heat generated in the motor windings. To avoid overheating, motors that deliver peak torque are used in short bursts with a cooling period in between. This pattern is what “intermittent duty” describes: high torque for a limited time, then a rest phase to allow cooling. Running at high torque continuously would push the motor past its thermal limits, so continuous or unlimited duty isn’t suitable. Heavy-duty isn’t a standard duty type for this behavior, so the concept that fits best is intermittent duty.