How does a weighted average meter measure alternating current?
A) It calculates the root mean square value of the current.
B) It reads the current at the test point and applies an averaging factor.
C) It takes an average over a short period of time.
D) It measures the current's ability to lift a small weight inside the meter.
C
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La coordinación selectiva garantiza que:
a. sólo queda fuera de servicio la parte del sistema que ha fallado. b. el sistema entero queda fuera de servicio cuando se detecta un fallo. c. el fusible de servicio principal tiene el tiempo de apertura más corto. d. el dispositivo contra sobrecorriente del alimentador elimina un fallo en un circuito derivado.
A system that can be used to give instructions to building occupants in the event of an emergency is called a(n) _____.
a. analog addressable system b. addressable system c. intelligent system d. voice evacuation system
Which of the following is not a method used to develop an extruded object?
a. Following a path b. Perpendicular to its plane c. Between two cross sections d. In a specified direction
__________ is also very popular in home building where termites and water damage are known to be problems.
A. Wood framing B. Metal framing C. Balloon framing D. Platform framing