Question 301Steam Plants - 1st Asst/Chief

The correct answer is A) A steam deflector is provided between the astern element and the ahead stages of the LP turbine. This is correct because the illustration shows a typical marine steam turbine design, where a steam deflector is commonly used to direct the steam flow from the astern element to the ahead stages of the low-pressure (LP) turbine. This arrangement helps to improve the efficiency of the turbine by minimizing losses during the transition from astern to ahead operation. The other answer choices are incorrect because: B) The ahead rotor is more likely a reaction type turbine, not a Parsons type; C) The astern element is typically a single-stage Curtis type, not two three-row stages; and D) The LP turbine is indeed designed with reaction type stages, not the statement in the question.