John wants to install a wall-mounted motion detector. What is the optimal height at which it should be installed?
A)Four feet
B)Two feet
C)One foot
D)Seven feet

Question

Quizplus · Accepted Answer

A wall-mounted motion detector should be placed seven feet from the ground.
Key Takeaway: A wall mounted motion sensor should be placed at any height between 5.5 to 10 feet. The justification behind this height is that the sensor should be able to detect an average person's height and the 5.5 to 10 feet provides the distance range of coverage of 35 feet in length.

John Wants to Install a Wall-Mounted Motion Detector