Question 156Steam Plants - QMED70% to pass
Under what circumstances would a propulsion steam turbine turning (jacking) gear most likely be used?
AI Explanation
The correct answer is A) Warming-through the main turbines prior to maneuvering.
The propulsion steam turbine turning (jacking) gear is used to slowly rotate the main turbines before starting the engine to gradually warm up the turbine components. This is a critical step to prevent thermal shock and potential damage to the turbine blades and other parts. The jacking gear is not used for reverse thrust, astern operations, or additional power while underway, which makes options B, C, and D incorrect.
Related Questions
#154 Which of the conditions listed should be immediately reported to the engineering officer on watch? #155 The jacking gear on main propulsion turbines can be used to _______________.#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 _______________.#159 What statement is true concerning a propulsion steam turbine turning (jacking) gear?