Turbine DCS Operator Interview Questions and Answers

Vibration in turbines can occur due to unbalance, misalignment, resonance, or mechanical looseness.

• Unbalance in rotating parts

• Misalignment of shafts or bearings

• Resonance with natural frequencies

• Mechanical looseness in components

Impulse and reaction turbines differ in the way they convert fluid energy into mechanical energy.

• Impulse turbines use high-velocity jets of steam or water to rotate the blades, while reaction turbines use the pressure of the fluid to rotate the blades.

• Impulse turbines have fixed nozzles that direct the fluid onto the blades, while reaction turbines have moving blades that rotate as the fluid flows over them.

• Examples of impulse turbines include Pelton and Turgo turbines, while...read more

Parameters such as flow rate, steam pressure, and feedwater temperature are maintained to ensure proper operation of the turbine DCS system.

• Flow rate of steam must be controlled to maintain desired turbine speed and power output.

• Steam pressure needs to be regulated to prevent damage to turbine components.

• Feedwater temperature must be monitored to ensure efficient heat transfer in the boiler.

• Maintaining proper temperature and pressure helps prevent overheating and equipment fa...read more

Types of bearings used in turbines include journal bearings, thrust bearings, and tilting pad bearings.

• Journal bearings are commonly used in turbines to support rotating shafts.

• Thrust bearings are used to handle axial loads in turbines.

• Tilting pad bearings are designed to provide stability and reduce vibration in turbines.