Question

question 5 / 20
in order to maximize the life span of an articulated ladder, one should: select the best answer:
lubricate the ladders moving parts
clean ladder after each use
protect ladders from heat, weather and corrosive materials
all of the above
none of the above

Explanation:

Lubricating moving parts reduces friction - wear, cleaning after use removes dirt - debris that can cause damage, and protecting from heat, weather, and corrosive materials prevents deterioration. All these actions contribute to maximizing the life - span of an articulated ladder.

Answer:

All of the above