Question 510Steam Plants - Assistant Engineer

The correct answer is A) Babbitt lined split shell. Babbitt lined split shell bearings are commonly used for the reduction gears in a marine steam turbine installation. These bearings are designed to handle the high loads and speeds associated with marine reduction gears. The split shell design allows for easy installation and maintenance of the bearings. Babbitt, a soft metal alloy, is used as the lining material as it provides good lubrication and wear properties. The other options are not typically used for marine steam turbine reduction gears. Sintered bronze bushings (B) may be used in lower-speed, lower-load applications. Lignum vitae lined precision bearings (C) are an older technology not commonly used in modern marine installations. Bronze lined cutless bearings (D) are primarily used for propeller shaft applications, not reduction gears.