Final answer:
The main reason a trackman should observe the condition of his tools is to ensure safety and effectiveness.
Step-by-step explanation:
The main reason a trackman should observe the condition of his tools is to ensure their safety and effectiveness. Trackmen work with various tools and equipment, such as gauge bars, alignment devices, and measurement instruments, to inspect and maintain railroad tracks. By regularly checking the condition of these tools, trackmen can identify any defects or issues that may affect their performance, preventing accidents or errors in their work.