Question 348Steam Plants - 1st Asst/Chief70% to pass
Prior to rolling the main turbines in preparation for getting underway, you should _______________.
AI Explanation
The correct answer is D) disengage the turning gear.
Before starting the main propulsion turbines, the turning gear must be disengaged. The turning gear is used to slowly rotate the main shafts when the ship is not underway, to prevent sagging or distortion of the bearings and gears. Engaging the turning gear while the turbines are running would cause damage to the turning gear mechanism. The other options are not directly related to preparing the propulsion system for getting underway.
Related Questions
#346 After properly lining up the main propulsion turbine for warm up, steam should first be admitted to the rotor through the _______________.#347 With vacuum up and the main propulsion turbine standing by while awaiting engine orders, it is necessary to roll the unit alternately ahead and astern every five minutes to _______________.#349 Before placing the jacking gear in operation on a main turbine unit, you must always insure that _______________.#350 To stop the rotor of a main turbine while underway at sea you should _______________.#351 When a turbine rotor is not rotating during maneuvering, the heat tends to be concentrated at the _______________.