¿Cuántos diodos se necesitan para convertir alimentación de CA trifásica en alimentación de CD de alta eficiencia?
a. Dos
b. Cuatro
c. Seis
d. Ocho
c. Seis
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The type of survey that divides a plot of land into a checkerboard is known as a:
a. Radial survey b. Control point survey c. Grid survey d. Geodetic survey
A mobile crane configured for personnel hoisting should have all of the following features except _____.
a. one allowing freewheeling of the hoist drum b. boom-length indicator on a telescopic boom c. boom-angle indicator d. positive-locking outriggers
Gray iron is a popular casting material for ____.
A. automotive cylinder blocks B. agricultural implements C. cast iron pipe D. machine tools E. all of the above
Before using a voltage tester, check to make sure it is functioning correctly by _____
a. touching the leads together b. connecting it to a known energized source c. grounding the leads d. checking it with a multimeter