Which is the following acronyms refers to the safety procedure that workers should use when performing maintenance or repair on machinery

The Answer is LOTO. LOTO stands for Lock out/Tag out. When preforming maintenance or repair on machinery it is important to use LOTO or Lock out/Tag out to insure that no one uses the machinery while it is under repair/maintenance. This is important because using a machine while under repair or maintenance could result in serious injury or even death.

yes, it can be both.

the aesthetic impact is that moment when you are relating spatially to the target. the "ai" occurs when you have an impression that includes both you and the target and is usually a spatial relationship.