Which protective measure is most effective against primary blast effects?

• A. Shielding behind a barrier.
• B. Standoff distances.
• C. Heat resistant gloves.
• D. Bright lighting.

Answer: (B)

Primary blast effects come from the initial shock wave, so the key protection is reducing the energy reaching you. The pressure from a blast decays very quickly with distance, so increasing your standoff from the source dramatically lowers both the peak overpressure and the impulse you experience. Barriers can sometimes block or redirect part of the energy, but waves can wrap around and reflections can still produce dangerous pressures, making distance a more reliable safeguard. Heat-resistant gloves protect against thermal hazards, not the pressure wave, and bright lighting offers no protection against blast effects. So, maximizing distance from the blast source is the most effective protective measure against primary blast.