Which instruments and components are commonly used for drum level control, and what problems can affect them?

Which instruments and components are commonly used for drum level control, and what problems can affect them?

• A. Temperature sensors and flow meters used for level control.
• B. Level gauges, float or electronic transmitters, and control loops; problems include stuck gauge glass, sensor drift, wiring faults.
• C. Pressure gauges and relief devices.
• D. Safety valves and alarms.

Answer: (B)