When outdoor receptacles are installed where a cord will be plugged in permanently, such as for decorative lighting, the box cover ____ maintain weatherproof integrity when the cord is plugged in.
A) must
B) need not

Question

Quizplus · Accepted Answer

The use of the word "permanently" implies that the cord will not be unplugged frequently, which means that the weatherproof integrity of the box cover must be maintained at all times. Therefore, choice A, "must," is the best option.

When Outdoor Receptacles Are Installed Where a Cord Will Be