A solid blue circle safety sign denotes which category of instruction?

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Multiple Choice

A solid blue circle safety sign denotes which category of instruction?

Explanation:
In safety signs, color and shape indicate the type of instruction. A solid blue circle represents a mandatory instruction—something you must do to stay safe. The blue color signals an obligation, and the circular shape shows it’s a required action (for example, wear the designated PPE or follow a specified procedure). This is different from warning signs, which are typically yellow and indicate hazards, and from prohibition signs, which use red to show actions you must not take.

In safety signs, color and shape indicate the type of instruction. A solid blue circle represents a mandatory instruction—something you must do to stay safe. The blue color signals an obligation, and the circular shape shows it’s a required action (for example, wear the designated PPE or follow a specified procedure). This is different from warning signs, which are typically yellow and indicate hazards, and from prohibition signs, which use red to show actions you must not take.

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