Question 155Steam Plants - QMED70% to pass
The jacking gear on main propulsion turbines can be used to _______________.
AI Explanation
The correct answer is C) provide reduction gear tooth inspection.
The jacking gear on main propulsion turbines is used to slowly rotate the turbine shaft, allowing for visual inspection of the reduction gear teeth. This allows the engineer to check the condition of the gear teeth without the turbine running at full speed. The jacking gear does not provide propulsion in emergencies (B), nor is it used to lift the reduction gear casing (A) or reduce turbine speed during maneuvering (D). The primary purpose of the jacking gear is to facilitate routine inspection and maintenance of the reduction gears, which is a critical safety requirement for the proper operation of the main propulsion system.
Related Questions
#153 In a pressure type main propulsion turbine lubrication system, the lube oil service pumps normally take suction from the main sump and discharge directly to the _______________.#154 Which of the conditions listed should be immediately reported to the engineering officer on watch? #156 Under what circumstances would a propulsion steam turbine turning (jacking) gear most likely be used? #157 What statement concerning the operation of a propulsion steam turbine turning (jacking) gear is true? #158 The jacking gear must be engaged as quickly as possible when securing the main turbines in order to _______________.