7. Pushing the e-stop: a. Causes an emergency in the tunnel. b. Disengages the conveyor c. Stops all equipment in the tunnel. d. Is a safety measure. e.b,c,and d

## Step 1<br />The problem is about understanding the function of the "e-stop" in a tunnel system. The "e-stop" is a safety feature that is used to stop all equipment in the tunnel in case of an emergency.<br /><br />## Step 2<br />Option a, "Causes an emergency in the tunnel", is not correct. The "e-stop" is a safety feature, not a cause of emergencies.<br /><br />## Step 3<br />Option b, "Disengages the conveyor", is correct. The "e-stop" can be used to disengage the conveyor, which is a piece of equipment in the tunnel.<br /><br />## Step 4<br />Option c, "Stops all equipment in the tunnel", is also correct. The "e-stop" is designed to stop all equipment in the tunnel in case of an emergency.<br /><br />## Step 5<br />Option d, "Is a safety measure", is correct. The "e-stop" is a safety feature that is used to stop all equipment in the tunnel in case of an emergency.<br /><br />## Step 6<br />Option e, "b, c, and d", is correct. It includes all the correct options b, c, and d.