Según OSHA, las herramientas y los aparatos portátiles no deben conectarse a tierra:

a. si tienen un sistema aprobado de doble aislamiento.
b. si van a desecharse. De otra manera, todas las herramientas y los aparatos portátiles siempre deben conectarse a tierra.
c. si tienen aislamiento.
d. si consumen menos de 10 amperios de corriente.


a. si tienen un sistema aprobado de doble aislamiento.

Trades & Technology

You might also like to view...

The angle of a piping offset with a run of 9-1/2 inches and a set of 11 inches is _____ degrees.

a. 49 b. 51 c. 64 d. 87

Trades & Technology

Ground straps are used to:

A. Provide a return path to the battery between insulated components. B. Suppress electromagnetic induction. C. All of these choices. D. None of these choices.

Trades & Technology

What type of orbit do geostationary orbits use?

A. Equatorial orbit B. Polar orbit C. Inclined orbit D. Subsatellite orbit

Trades & Technology

Using a stretcher course and a rowlock course to form each step, how many standard-size bricks are needed to face the surfaces of a flight of 5 concrete stairs if each tread measures 12" deep by 40" wide?  (Refer to the diagram on page 65 in the book.)

What will be an ideal response?

Trades & Technology