Define duty cycle and continuous duty as used in portable power tools
What will be an ideal response?
Duty cycle refers to the amount of time a motor can run versus the time it needs to cool off.
Continuous duty means a tool can be used all the time for a 6- or 8-hour workday.
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Answer the following statement(s) true (T) or false (F)
1. The external wiring diagram is used to locate problems and failures in the operation of the controller. 2. One of the most advantageous characteristics of the motor-generator set drive is its inherent capability to regenerate. 3. Electrically controlled, variable speed motor drives offer a wide choice of speed ranges, torque, and horsepower characteristics. 4. For some machinery with precise requirements, AC motors provide characteristics that are not available on DC motors. 5. Static DC drives utilize moving parts in the power conversion equipment that converts (rectifies) and controls the AC power.
List the four general types of curves.
What will be an ideal response?
_____ vocalizations sound more like a series of chirps than croaks
a. Chorus frog b. Northern cricket frog c. Tree frog d. Green frog
What type of measurements require a true RMS meter to obtain accurate results?
A) Nonlinear, electronic switching loads B) Strip heater current C) Linear alternating current loads D) Shaded-pole motor current