Question 714Steam Plants - Assistant Engineer

You are correct, the answer B) the main lube oil system is operating is the correct answer. Before placing the jacking gear in operation on a main turbine unit, it is crucial to ensure that the main lube oil system is operating. This is because the jacking gear is used to slowly rotate the turbine rotor during maintenance or overhaul, and the main lube oil system is responsible for providing lubrication to the turbine bearings and other critical components. If the main lube oil system is not operating, the jacking gear operation could cause damage to the turbine due to inadequate lubrication. The other answer choices are incorrect because they do not directly relate to the safe operation of the jacking gear. The gland seal steam system, condensate system, and main salt water circulating pump are important systems for the overall operation of the main turbine unit, but they are not directly related to the jacking gear's safe operation.