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Question

What is the primary color used in warning signs to alert workers of potential hazards?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is

Yellow with black symbol or text

Warning signs in the industrial and construction sectors are crucial for alerting workers of potential hazards. The International Organization for Standardization (ISO) specifies standard colors for safety signs to ensure consistency and recognition worldwide. Among these standards:

  1. Yellow with black symbol or text: This is primarily used for warning signs to indicate caution. Yellow is a bright, attention-grabbing color that conveys the need for alertness due to potential hazards.
  2. Blue with white symbol or text: Generally used for mandatory instructions or actions that must be followed.
  3. Green with white symbol or text: Typically used to indicate safe conditions or the location of safety equipment.
  4. Red with white symbol or text: Primarily used for prohibitions and fire-related hazards or equipment.

In aligning with these standards, yellow with black symbol or text is specifically used for warning signs. This combination effectively alerts workers to exercise caution and be aware of potential safety risks.

Therefore, the correct answer is:

  • Yellow with black symbol or text

Conclusion: The correct choice for warning signs in the context of worker safety is yellow with black text or symbols, ensuring maximum visibility and effective communication of caution.

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