Which of the following is a precaution for curving/slip form rollers?

Keeping fingers clear of rollers and gears is essential for safety when working with curving or slip form rollers. These machines contain moving parts that can cause severe injuries if body parts come into contact with them. The risk of entrapment or crushing is significant, especially in high-speed operations. By ensuring that fingers and other body parts are kept at a safe distance, operators minimize the risk of accidents and maintain a safer work environment.

The other options present potential hazards or are not advisable practices when operating machinery. For instance, wearing loose clothing could lead to entanglement in the moving parts of the rollers. Utilizing steel hammers for adjustments carries risks of damaging equipment or causing injury if a hammer slips. Placing heavy items on the rollers could affect the machine's balance and lead to malfunctions or operator strain, compromising safety. Therefore, maintaining a clear distance from rollers and gears is the most prudent precaution.