A(n) __ prevents someone from powering up a machine while it is being serviced by someone else. Emergency stop Cycle halt Lockout Interlock

## Step 1<br />The problem is asking for the term that describes a safety measure that prevents someone from powering up a machine while it is being serviced by someone else. The options provided are "Emergency stop", "Cycle halt", "Lockout", and "Interlock".<br /><br />## Step 2<br />An "Emergency stop" is a mechanism that stops a machine immediately in case of an emergency. This does not necessarily prevent someone from powering up the machine while it is being serviced.<br /><br />## Step 3<br />A "Cycle halt" is a term used in programming to describe a situation where the execution of a program is stopped. This is not related to the context of the problem.<br /><br />## Step 4<br />A "Lockout" is a safety measure that prevents someone from powering up a machine while it is being serviced by someone else. This is done by locking the machine's controls, preventing unauthorized access.<br /><br />## Step 5<br />An "Interlock" is a system that ensures that certain conditions are met before a machine can operate. This does not necessarily prevent someone from powering up the machine while it is being serviced.