C7 Energy Management & Building Automation 2

Question 1

In a BAS, what does the term 'setpoint' refer to?

Accepted Answer

The target value a control system attempts to maintain

Answer

A setpoint is the desired target value (e.g., temperature, humidity) that a building automation controller regulates toward.

Question 2

Which protocol is most commonly used for peer-to-peer communication between BAS field controllers over a twisted-pair network?

Accepted Answer

BACnet MS/TP

Answer

BACnet MS/TP (Master-Slave/Token-Passing) is widely used for field-level controller communication over RS-485 twisted-pair wiring.

Question 3

A demand-controlled ventilation (DCV) system modulates outdoor airflow based on readings from which sensor type?

Accepted Answer

CO2 concentration sensors

Answer

DCV systems use CO2 sensors as a proxy for occupancy to adjust outdoor air damper positions and maintain acceptable indoor air quality.

Question 4

What is the primary purpose of a 'dead band' in HVAC control logic?

Accepted Answer

To create a neutral zone where neither heating nor cooling is active

Answer

A dead band is a range between heating and cooling setpoints where no conditioning occurs, preventing equipment short-cycling.

Question 5

Under California Title 24 Part 6, automatic daylighting controls must turn off or reduce electric lighting when daylight levels are sufficient in which type of spaces?

Accepted Answer

Primary sidelighted and toplit areas

Answer

Title 24 Part 6 requires automatic daylighting controls in primary sidelighted and toplit areas to reduce energy consumption from electric lighting.

(C7) California C7 Low Voltage Systems Contractor Certification Practice Test

(C7) California C7 Low Voltage Systems Contractor Certification Practice Test

C7 Energy Management & Building Automation 2