UL define los dispositivos de Clase A como aquéllos que se disparan cuando la corriente de pérdida a tierra sea de _____ o superior.

a. 6mA
b. 8mA
c. 10mA
d. 15mA


a. 6mA

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In a string array system, there are a number of ____ in the or on the building of the installation.

a. grid-based tools b. circle inverters c. grid-tied inverters d. square inverters

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When steel is exposed to moisture and air, ____________________ occurs

Fill in the blank(s) with the appropriate word(s).

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?What should the gun angle and travel direction be for making a 1G weld from the 1:30 to 10:30 positions?

A. ?A 45°forehand angle in the direction of travel. B. ?A 14° to 20° forehand angle in the direction of travel. C. ?A 30° to 90° backhand angle in the direction of travel. D. ?A 60° backhand angle in the opposite direction of travel.

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What is NOT a duty of a general service technician?

A) Have the customer sign the work order B) Perform vehicle repair procedures C) Diagnose the customer's concern D) Order the parts needed

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