The operator of electrical motors should keep a constant check on the loads they carry because （）<br>A:low loads necessitate frequent insulation cleaning<br>B:exceeding nameplate values shortens useful life<br>C:energy is wasted if full loading is not utilized<br>D:power factor correction methods are load dependent

The operator of electrical motors should keep a constant check on the loads they carry because （）
A:low loads necessitate frequent insulation cleaning
B:exceeding nameplate values shortens useful life
C:energy is wasted if full loading is not utilized
D:power factor correction methods are load dependent

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