To transmit information, systems using power-line carrier technology make use of _____.
a. dead legs
b. wiring
c. the metal portion of a building’s structure
d. GFCI devices and ground wiring
b. wiring
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Thermal overload units are widely used on both the fractional and integral horsepower manual starters for protection of motors from sustained electrical overcurrents that could result from overloading of the driven machine or from ____.
a. excessively low line voltage b. excessively low power load c. excessively high line voltage d. excessively high power load
Answer the following statement(s) true (T) or false (F)
The band saw cuts with a revolving strip of metal that has teeth.
List seven items that should be included in a first aid kit carried in an HVAC technician's service truck.
What will be an ideal response?
In a simple pulse-timer circuit, a ____ is most commonly used to provide a pulse.
a. junction transistor b. triac c. capacitor d. unijunction transistor