Engine 2014: Steam Plants

1. A lubricant film thickness during start-up is considerably less than the dimensions of gear surface irregularities
2. B differential expansion can result from the temperature difference between the rotor and rotor casing
3. C the danger of blade erosion damage from dry steam impingement is greater during start-up
4. D harmonic vibrations associated with critical speed can easily be reached during start-up

Tip: press A-D to answer