Which of the following is true concerning the class "A" air conditioning system shown in the illustration as used to condition the air of large public spaces? Illustration GS-RA-09 Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option C — The dry bulb room temperature is controlled by a steam heated reheater and its associated pneumatic control valve.

Class 'A' public space air conditioning systems utilize a steam-heated reheater and associated pneumatic control valves to precisely regulate room dry-bulb temperature after the air has been dehumidified by the cooling coil.