How much water may soldiers lose per hour in MOPP 4?

• A. 1 pint
• B. 2 quarts
• C. 1 quart or more
• D. 1 gallon

Answer: (C)

In MOPP 4, wearing the fully protective gear traps heat and makes cooling through evaporation less effective, so the body loses water quickly through sweating. The typical hourly water loss under these conditions is about a quart or more, which is why the best answer is that amount or more per hour. This baseline helps prevent dehydration and heat injury during prolonged operations. The other options underestimate or overstate the usual rate: a pint is not enough under heavy heat stress, two quarts can occur but the standard expectation is at least a quart per hour, and a gallon per hour is an overall excessive rate for normal field activity.