Question 97Steam Plants - 1st Asst/Chief
70% to passMaintaining low pressure in a condensing turbine exhaust trunk _______________.
Aenables better utilization of available heat energy to perform work
Beliminates creep problems in the exhaust trunk during maneuvering
Creduces condensate depression with low seawater temperature
Dprevents steam turbulence in the exhaust trunk due to steam laning
AI Explanation
The correct answer is A) enables better utilization of available heat energy to perform work. Maintaining low pressure in a condensing turbine exhaust trunk allows the turbine to extract more energy from the steam, as the lower pressure increases the temperature difference between the steam and the cooling medium (typically seawater). This greater temperature difference enables more efficient heat transfer and better utilization of the available thermal energy to perform work and generate power. The other options are incorrect because they do not directly address the primary purpose of maintaining low pressure in the exhaust trunk, which is to improve the overall efficiency of the turbine system.
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