Question

a daily check of track tension is performed ____. only on machines with metal tracks only on machines with rubber tracks only by a factory - trained technician on machines with metal and rubber tracks

Explanation:

Track - tension checks are important for both metal - and rubber - tracked machines to ensure proper operation and prevent premature wear. It is not exclusive to either type of track material and can be part of routine maintenance by trained personnel, not just factory - trained technicians.

Answer:

D. on machines with metal and rubber tracks