John Dewey was the American educator who wrote the very influential book, Democracy and Education
Lock out is a energy isolating device which is used to prevent works from being injured when working on or near an electrical device.
Explanation:
- The lock out device physically locks the device from the system in a safe mode.
- It is a device to control hazardous energy emitted from various electrical instruments.
- The lockout device should be durable enough to withstand workplace condition and should be standardized according to color,shape and size
The answer is <span>a. Henry Clay</span>