Question 665Steam Plants - Assistant Engineer70% to pass
The jacking gear on main propulsion turbines can be used to _______________.
AI Explanation
The correct answer is A) provide reduction gear tooth inspection.
The jacking gear on main propulsion turbines is used to slowly rotate the turbine shaft to allow for inspection of the reduction gear teeth without the turbine running. This enables maintenance personnel to visually inspect the condition of the reduction gear teeth, which is an important part of routine maintenance on marine propulsion systems.
The other options are incorrect because the jacking gear is not used to provide propulsion in emergencies (B), reduce turbine speed during maneuvering (C), or lift the reduction gear casing (D). The primary purpose of the jacking gear is to facilitate inspection of the reduction gear, which is the correct answer (A).
Related Questions
#663 If a line shaft bearing begins to overheat, the shaft speed should be reduced. If overheating persists, you should then _______________.#664 Precautions to be observed prior to starting a turbine driven cargo pump should include _______________.#666 The jacking/turning gear mechanism of a main propulsion geared turbine installation is normally connected through mechanical linkage to the _______________.#667 Which of the devices listed is generally used to engage the main engine turning gear to the high-pressure turbine high-speed pinion? #668 The main propulsion shaft turning gear usually connects to the free end of the high- speed high-pressure pinion because the _______________.