List two examples of situations where disconnecting the power to perform electrical work may create an additional or increased hazard.________________________________________________________________________
What will be an ideal response?
Life support equipment
Emergency alarm systems
Ventilation systems in hazardous locations
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Refer to the accompanying figure. Basic electrical theory of a DC motor-generator, variable speed control system. Briefly explain how speeds above the motor base speed (nameplate speed) and speeds below the motor base speed are obtained.
What will be an ideal response?
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The clustering of soil particles into various shapes is called:
a. soil field capacity c. soil salinity b. soil structure d. soil texture
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The most common welding process is _____
a. GMAW b. SMAW c. GTAW d. TMAW
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A continuity tester may be used to determine whether a conductor is properly grounded or has a break in the circuit.