What shall all belt conveyors be inspected for daily?

Daily inspections of belt conveyors are crucial for operational safety and efficiency. The correct choice highlights the importance of checking for potential hazards that could lead to accidents or equipment failure. Inspecting for frozen rollers, rock falls, and fires addresses multiple critical safety concerns. For instance, frozen rollers can cause the conveyor system to jam, which may lead to further operational issues or mechanical breakdowns. Rock falls pose a direct risk to workers and can hinder the conveyor's function, while fire hazards need to be checked to prevent catastrophic events that could jeopardize safety.

Other options do not encompass the wide range of critical safety checks necessary for daily inspections. While wear and tear, dust accumulation, and electrical malfunctions are important aspects of equipment maintenance, they do not cover the immediate and potentially dangerous issues that could arise and affect the conveyor's operation and the safety of personnel working around them. Thus, the comprehensive approach of daily inspections focusing on various potential hazards is essential for maintaining a safe working environment.