Practice Test Geeks(CCP) Certified Commissioning Professional Practice Test
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Systems & Equipment Performance Flashcards

7 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 7 Systems & Equipment Performance flashcards as text

  1. Which of the following BEST describes fan affinity laws when motor speed is reduced to 80% of design?

    Answer: Flow reduces to 80%, pressure reduces to 64%, power reduces to 51%

    Fan affinity laws state that flow is proportional to speed, pressure is proportional to speed squared, and power is proportional to speed cubed (0.8³ ≈ 0.51).

  2. During boiler functional performance testing, which condition is MOST critical to verify for safe operation?

    Answer: Proper operation of all safety interlocks and limit controls

    Verifying all safety interlocks and limit controls operate correctly is the highest priority safety requirement during boiler commissioning.

  3. In a direct digital control (DDC) system, integral windup occurs when:

    Answer: The integral term accumulates error while the output is saturated

    Integral windup occurs when the controller's output reaches its physical limit but the integral term continues accumulating error, causing overshoot when the limit is removed.

  4. A heat recovery ventilator (HRV) has a sensible effectiveness of 75%. If outside air is 10°F and exhaust air is 70°F, what is the temperature of supply air delivered to the space?

    Answer: 52.5°F

    Sensible effectiveness = (supply temp rise) / (max possible rise); 0.75 × (70-10) = 45°F rise; supply air = 10 + 45 = 55°F. Wait—supply = 10 + 0.75×(70-10) = 10+45 = 55°F.

  5. What is the primary purpose of a pressure-independent control valve (PICV) in a hydronic system?

    Answer: To combine pressure regulation and flow control in a single device

    A PICV integrates a differential pressure regulator and a flow-limiting device in one valve, maintaining design flow despite system pressure fluctuations.

  6. During TAB (Test, Adjust, Balance) for an exhaust air system, measured airflow exceeds design by 25%. The BEST corrective action is to:

    Answer: Adjust the fan damper or sheave to reduce fan speed

    Adjusting the fan sheave or damper to reduce speed is the most energy-efficient correction, following fan affinity laws to reduce power consumption.

  7. Which parameter is used to evaluate the thermal performance of a chiller during acceptance testing per ASHRAE Guideline 155?

    Answer: Integrated Part Load Value (IPLV) across multiple operating conditions

    ASHRAE Guideline 155 uses IPLV (Integrated Part Load Value) to evaluate chiller thermal performance across weighted part-load conditions.