What do general requirements for machine guards include?

General requirements for machine guards are designed to enhance worker safety by addressing multiple aspects of machine operation and maintenance. The comprehensive nature of these requirements leads to the conclusion that all options listed are important considerations.

Preventing contact and ensuring that guards are secured to the machine is fundamental because guards must effectively block access to moving parts to prevent injuries. This ensures that workers cannot inadvertently make contact with dangerous components while the machine is in operation.

Ensuring that no objects can fall into moving parts is critical for preventing accidents that could occur from loose items or debris getting caught in machinery, which can lead to mechanical failure or injury.

Creating no new hazards is essential as well; guards should not inadvertently create additional risks for workers. For instance, if a guard blocks a necessary control or worker pathway, it could lead to dangerous situations.

Furthermore, it's vital that machine guards do not interfere with normal machine operation. Guards should be designed to allow the machinery to function optimally while still providing the necessary protection to workers.

Thus, the correct answer encompasses all of these requirements, emphasizing that all elements are integral to ensuring safety around machines.