While working in a hot engine room, what is your best protection against heat exhaustion?

Correct Answer: Option C — Drinking plenty of a commercial beverage consisting of water, salt, and carbohydrates.

To prevent heat exhaustion, it is critical to replace both fluids and electrolytes lost through perspiration. Commercial electrolyte beverages containing water, salt, and carbohydrates are superior to plain water, as they facilitate faster absorption and help maintain the body's osmotic balance during strenuous work in hot environments.