¿Cuál es la principal diferencia entre los cables NM y NMC?
a. Los cables NM son para ubicaciones expuestas; los cables NMC para ubicaciones
ocultas.
b. Los cables NM retardan las llamas, mientras que los NMC no.
c. Tienen una capacidad nominal diferente para la cantidad de conductores permitidos.
d. Los cables NM son para ambientes secos únicamente; los cables NMC son para
ubicaciones tanto secas como húmedas.
d. Los cables NM son para ambientes secos únicamente; los cables NMC son para
ubicaciones tanto secas como húmedas.
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a. neutral b. grounding conductor c. high leg d. ungrounded conductor
Lockout/tagout devices are meant to _____.
a. de-energize a faulty circuit b. ensure that equipment can't be started while it is being repaired c. notify maintenance that a tool needs to be repaired d. keep unauthorized personnel out of high-voltage hazard areas
The ____ method of heating uses a high-frequency electrical current to establish a corresponding current on the surface of the part.
A. furnace B. induction C. dip D. resistance
When electric strip heat is used with a heat pump, when is the electric strip heat energized?
A) the heat pump comes on in first stage and the strips in second stage B) both the heat pump and the strips come on in second stage C) both the heat pump and strips come on in first stage D) the electric strip heat comes on in first stage, and the heat pump in second stage