How should you use a voltmeter when you do not know the voltage available to the equipment being worked on?
What will be an ideal response?
When you do not know the voltage available to the equipment being worked on, you should start with the highest scale on the meter and then change the meter setting until the needle falls in the midrange of the voltage scale.
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Las cargas de muros grandes pueden distribuirse equitativa- mente en cabezales de pilo- tes, ataguías o zapatas ensanchadas con el uso de _____.
a. viguetas de cimentación b. cimientos flotantes c. alfombrilla de cimientos d. armadura
Why are two sets of contacts (one set normally open and one set normally closed) needed on an indoor fan
relay? a. To allow high-speed operation in heating. b. To allow low-speed operation in cooling. c. To allow high-speed operation after a time delay. d. To ensure only one motor speed winding is energized at a time.
The continuous change of both amplitude and polarity of the magnetic field causes currents to be induced into the metal core material. These currents are called ____ currents.
A. induction B. electromagnetic C. relay D. eddy
Conventional natural gas that is collected along with liquid petroleum is known as ____ and it makes up about 21% of the gas produced in the U.S
a. first gas c. top gas b. hydrocarbon gas d. wet gas