Question

Air lines on a combination vehicle are often colored to keep from getting them mixed up. The emergency line is (blank)

A) Red
B) Black
C) Blue

Answer 1

The emergency line on a combination vehicle is usually colored red to differentiate it from other lines.

Step-by-step explanation:

In the context of air lines on a combination vehicle, the emergency line is usually colored red to differentiate it from other lines.

This helps prevent confusion and ensures that the emergency line is easily identified and accessed in case of an emergency.