CCP Controls & Automation Systems Flashcards
6 cards from real CCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CCP Controls & Automation Systems flashcards as text
What is the primary function of a Direct Digital Control (DDC) system in a commissioned building?
Answer: To automate control of building systems using digital logic and sensors
DDC systems use digital logic, sensors, and actuators to automatically control and monitor building systems such as HVAC, lighting, and access control.
During commissioning of a Building Automation System (BAS), what document defines the intended control sequences for each piece of equipment?
Answer: Sequence of Operations (SOO)
The Sequence of Operations defines exactly how each piece of equipment should respond to various conditions, serving as the basis for BAS programming verification.
A commissioning agent is verifying a variable air volume (VAV) box controller. Which sensor is most critical to verify for proper zone temperature control?
Answer: Zone temperature sensor
The zone temperature sensor provides feedback to the VAV controller to modulate airflow and maintain setpoint, making it the most critical sensor for zone temperature control.
What is PID control, and why is it commonly used in HVAC commissioning?
Answer: Proportional-Integral-Derivative; it minimizes control error by combining three correction methods
PID control combines proportional, integral, and derivative terms to minimize steady-state error and reduce oscillation, making it ideal for precise HVAC control loops.
During functional performance testing of a BAS, the Cx agent finds that the outside air damper fails to close during system shutdown. What is the most likely cause?
Answer: Actuator failure or incorrect control wiring
A damper that fails to close at shutdown typically indicates a failed actuator, loss of power to the actuator, or incorrect control wiring preventing the close signal from reaching the actuator.
What does 'trending' in a BAS context mean, and how is it used during commissioning?
Answer: Recording time-stamped data points from sensors/controllers to verify system performance over time
Trending logs time-stamped values from BAS points, allowing the Cx agent to verify that control sequences, setpoints, and responses perform correctly under real operating conditions.