The term used to describe a gas turbine in which air drawn from the atmosphere passes through the engine only once is which of the following?

Correct Answer: Option C — Open cycle.

An open cycle gas turbine draws ambient air into the compressor, where it is pressurized, heated in the combustor, expanded through the turbine, and finally exhausted back into the atmosphere. This single-pass process is the standard configuration for most marine propulsion gas turbines due to its simplicity and power density.