Question 121Steam Plants - QMED

The correct answer is A) Within the low pressure turbine. The astern staging is typically located within the low pressure turbine section of a main propulsion turbine set on a merchant ship. This is because the low pressure turbine is the largest and most powerful section, and it provides the best location to generate the necessary astern thrust to reverse the direction of the ship's propeller. The other turbine sections, such as the intermediate pressure and high pressure turbines, are not well-suited for the astern operation due to their smaller size and lower power output. The other answer choices are incorrect because: B) The intermediate pressure turbine is not the optimal location for the astern staging; C) A separate astern turbine is not a common configuration for merchant ship propulsion systems; and D) The high pressure turbine is too small and not powerful enough to effectively provide the necessary astern thrust.