Question 669Steam Plants - Assistant Engineer
70% to passThe purpose of the sentinel valve installed on a turbine casing is to _______________.
Avent excess steam to the main condenser
Bwarn the engineer of excessive pressure in the low-pressure turbine casing
Cwarn the engineer of backflow of steam from the exhaust trunk
Drelieve excess pressure to the turbine extraction points
AI Explanation
The correct answer is B) warn the engineer of excessive pressure in the low-pressure turbine casing. The sentinel valve is installed on the turbine casing to provide a warning to the engineer if excessive pressure builds up within the low-pressure turbine casing. This is an important safety feature, as high pressure in the turbine casing could indicate a problem that requires immediate attention, such as a blockage or malfunction that could potentially lead to a dangerous situation. The other answer choices do not accurately describe the purpose of the sentinel valve.
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