In the United States, the utility electrical power transmission frequency is held at ___ Hz

AC power has three basic frequencies.

In the United States, the utility electrical power transmission/distribution frequency is held at ________ Hz.

In other countries, the utility electrical power transmission/distribution frequency may be held at ________ Hz.

The power distribution frequency for aircraft and naval equipment (aeroplanes and ships) is often held at ________ Hz.

A) 80 ; 50 ; 600
B) 20 ; 40 ; 400
C) 60 ; 50 ; 400
D) 100 ; 20 ; 500

Show Answer

Answer:C

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