Which heat-stress control is aimed at reducing external heat gain?

Which heat-stress control is aimed at reducing external heat gain?

• A. Shielding
• B. Reducing external heat gain
• C. Active cooling
• D. Administrative controls

Answer: (B)

Shielding directly lowers external heat gain by blocking radiant heat from outside sources from entering the space. When you put up shade, reflective barriers, or other physical shields, you prevent a large portion of solar and other external heat from reaching workers and surfaces. That reduces the heat load before it becomes an indoor problem, which is why shielding is the heat-stress control aimed at cutting external heat gain. Active cooling, by contrast, removes heat after it’s already inside, and administrative controls change work practices or timing rather than the heat entering the space.

Shielding directly lowers external heat gain by blocking radiant heat from outside sources from entering the space. When you put up shade, reflective barriers, or other physical shields, you prevent a large portion of solar and other external heat from reaching workers and surfaces. That reduces the heat load before it becomes an indoor problem, which is why shielding is the heat-stress control aimed at cutting external heat gain.

Active cooling, by contrast, removes heat after it’s already inside, and administrative controls change work practices or timing rather than the heat entering the space.