Which propulsion powers SSN submarines?

Which propulsion powers SSN submarines?

• A. Diesel-electric propulsion.
• B. Nuclear reactor.
• C. Coal-fired steam propulsion.
• D. Solar-powered electric motors.

Answer: (B)

SSN submarines are powered by a nuclear reactor that provides the heat to run steam turbines which drive the propeller. This setup lets the submarine stay submerged for long periods and maintain high speeds because it does not need air or frequent refueling to operate. Diesel-electric propulsion, while used by some other submarine types, relies on diesel engines that burn fuel and require air, so it can’t sustain long periods underwater without surfacing or snorkeling to recharge batteries. Coal-fired steam propulsion is outdated for submarines and would require continuous access to oxygen and bulky fuel handling, which isn’t feasible underwater. Solar-powered systems aren’t practical underwater, since sunlight doesn’t penetrate to the depths these vessels operate.

SSN submarines are powered by a nuclear reactor that provides the heat to run steam turbines which drive the propeller. This setup lets the submarine stay submerged for long periods and maintain high speeds because it does not need air or frequent refueling to operate. Diesel-electric propulsion, while used by some other submarine types, relies on diesel engines that burn fuel and require air, so it can’t sustain long periods underwater without surfacing or snorkeling to recharge batteries. Coal-fired steam propulsion is outdated for submarines and would require continuous access to oxygen and bulky fuel handling, which isn’t feasible underwater. Solar-powered systems aren’t practical underwater, since sunlight doesn’t penetrate to the depths these vessels operate.