Which device adjusts pump performance in the propeller anti-icing system?

Which device adjusts pump performance in the propeller anti-icing system?

• A. Rheostat
• B. Temperature sensor
• C. Flow meter
• D. Pressure relief valve

Answer: (A)

The device that adjusts pump performance is a rheostat. A rheostat acts as a variable resistor in the pump circuit, changing the electrical current to the pump motor. By increasing or decreasing resistance, it speeds up or slows down the pump, thereby controlling the flow rate of the anti-icing fluid to the propeller. This direct adjustment is essential to dial in the right amount of fluid under different conditions. The other components serve different roles: a temperature sensor monitors conditions but doesn’t regulate pump speed, a flow meter shows how much fluid is flowing but doesn’t control the pump, and a pressure relief valve protects the system from overpressure without changing pump output.

The device that adjusts pump performance is a rheostat. A rheostat acts as a variable resistor in the pump circuit, changing the electrical current to the pump motor. By increasing or decreasing resistance, it speeds up or slows down the pump, thereby controlling the flow rate of the anti-icing fluid to the propeller. This direct adjustment is essential to dial in the right amount of fluid under different conditions. The other components serve different roles: a temperature sensor monitors conditions but doesn’t regulate pump speed, a flow meter shows how much fluid is flowing but doesn’t control the pump, and a pressure relief valve protects the system from overpressure without changing pump output.