Question 709Steam Plants - Assistant Engineer70% to pass
Operating a steam turbine propulsion unit at medium-speed, in an area with extremely cold sea water and the main circulating pump providing full cooling water flow to the condenser will result in _______________.
AI Explanation
The correct answer is A) increased condensate aeration due to the inability of the air ejectors to remove excessive air accumulation from the condenser.
Explanation:
1. Confirmation of correct answer: A is the correct answer.
2. Explanation of reasoning: In an area with extremely cold sea water, the main circulating pump providing full cooling water flow to the condenser will result in increased condensation, which can lead to increased air accumulation in the condenser. This excessive air buildup can overwhelm the air ejectors, causing increased condensate aeration and reducing the effectiveness of the condenser.
3. Explanation of incorrect answers: Options B, C, and D are incorrect because they do not accurately describe the effects of operating a steam turbine propulsion unit in these conditions. The increased air accumulation would not improve the air ejectors' effectiveness, increase plant efficiency, or result in higher attainable vacuum.
Related Questions
#707 The main propulsion turbine should be operated with the _______________.#708 During normal operation of a main propulsion turbine, the lube oil supply temperature to the bearings should be maintained at approximately _______________.#710 The most critical period of main turbine operation is during cold start-up, rather than hot shutdown because _______________.#711 After properly lining up the main propulsion turbine for warm up, steam should first be admitted to the rotor through the _______________.#712 Which of the listed procedures should be followed when raising vacuum on the main propulsion plant prior to getting underway?