What must be done to side forms each time they are used for runways?

The choice that states side forms must be cleaned and oiled each time they are used for runways is correct because regularly cleaning and applying oil to side forms helps maintain their functionality and extends their life. Cleaning removes concrete residue, dirt, and debris that could affect the quality of the poured concrete and the integrity of the forms. Oiling the forms creates a barrier that prevents the concrete from sticking, facilitating easier removal of the forms after the concrete has set. This practice ensures smooth surfaces for the runways and prevents damage to both the forms and the concrete itself during the removal process.

Maintaining side forms in this manner is essential for achieving the desired finish and ensuring structural integrity in construction projects such as runways, where precision is crucial. This regular maintenance is key to avoiding issues that could arise from worn or malfunctioning forms, ultimately supporting efficient construction workflows and high-quality results.