In addition to starting, stopping and controlling the speed of a motor, the controller may be required to respond to a number of conditions. List four examples of these conditions.
What will be an ideal response?
Relays have been designed to respond to one or more of the following conditions: voltage, overvoltage, undervoltage, current, overcurrent, undercurrent, current direction, differential current, power (watts), power direction, volt-amperes, frequency, phase angle, power factor, phase rotation, phase failure, impedance, speed, or temperature.
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A ____________________ has four independently controllable outputs.
Fill in the blank(s) with the appropriate word(s).
Wound rotor type motors and synchronous motors generally use autotransformer starters.
Answer the following statement true (T) or false (F)
A ____ is a point of designated elevation that is accessible at all times during the construction.
a.target b.baseline c.reference d.benchmark
____ means finding ways to reduce the size of the product, to reduce the amount of material used in the product, or to use materials that are more environmentally friendly.
A. Technology B. Waste prevention C. Recycling D. Composting