Question 342Steam Plants - 1st Asst/Chief

The correct answer is A) It can be used to connect the main turbine to the high-speed pinion. This type of coupling, known as a flexible coupling, is commonly used to connect the main turbine to the high-speed pinion in marine propulsion systems. Flexible couplings are designed to accommodate minor misalignment and vibrations between the turbine and the gearbox, allowing for a smooth transfer of power. The other options are incorrect because: B) This type of coupling is not typically used between the first and second reduction gears, which often use a more rigid connection. C) Flexible couplings are not limited to small auxiliary turbines - they are widely used in larger main propulsion systems as well. D) While flexible couplings can accommodate some misalignment, their primary purpose is to connect the turbine to the high-speed pinion, not to allow for significant misalignment between the turbine and the second reduction gear.