Alberta Boilers Safety Association (ABSA) Practice Test

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What type of dampers are used for precise flow control in systems?

  1. Variable drain inlet

  2. Parallel

  3. Opposed

  4. Pilot position

The correct answer is: Opposed

The type of dampers that are used for precise flow control in systems are opposed dampers. These dampers have blades that move in opposite directions to each other. This design allows for fine adjustments to the airflow, enabling operators to precisely regulate the amount of air or fluid passing through the system. By adjusting the damper position, it is possible to achieve specific flow rates and maintain optimal conditions for various applications. In contrast, variable drain inlet dampers primarily adjust the drainage flow rather than providing fine control for airflow. Parallel dampers provide more basic open/close functionality rather than precise flow modulation. Pilot position dampers are generally used in conjunction with other controls to manage settings but do not independently provide the level of precision that opposed dampers do.