DDC Final Study Guide

_____ maintenance is the monitoring of wear conditions and equipment and comparing them to a predetermine tolerance.

If there is insufficient fresh air circulated within the occupied building space, _____ and _____ may build.

A device that changes the state of a controlled device in response to a command from a building automation controller

Has the high priority of the control strategies

_____ is the process of adjusting and balancing a HVAC system for maximum efficiency

A DDDC system is a control system that has _____ at the controller level and is able to perform close loop controls.

A _____ control system is a control system that uses electricity (24 VAC or higher) to operate the devices in the system

A triac is a solid-state device used to switch ___

Incorporates low-impedance drivers and receivers providing high tolerance to noise/polarity- sensitive.

Network communication module is a controller that coordinates communication from _____ to _____ .

The economizer cycle refers to _____.

_____ is a control technique in which a sequence of short pulses are used to position an actuator

_____ are used in hybrid control systems as an interface between different control system technologie

A _____ is a resistor made of a material for which the electrical resistance is a known function of the temperature.

Applications that require a temperature, pressure, or humidity to not exceed a programmed values.

Open loop control is control in which _____ occurs between the controller, sensor, and controlled device.

Offset is the difference between a(n) _____ and a(n) _____.

The requirements for comfort include the proper control of temperature, humidity, ventilation, filtration, and _____.

A thermostat is a _____.

A current-sensing relay is a device which surrounds a wire and detects the _____ due to electricity passing through the

Specialized analog input sensors used to sense indoor air quality (IAQ) issues due to occupant activity would include __

A common device for building automation lighting loads which requires a short pulse to energize the load On/OFF

A device that senses such as temp pressure, or hum and causes a proportional electrical system change at the controller.

In a(n) _____ control system, the controller that is connected over the web is the network controller or supervisor.

A(n) _____ controller is a controller designed to control most HVAC equipment.

Proper control of the humidity level in a commercial building will provide _____.

A(n) _____ control system is a control system in which the power supply voltages are commonly 10 VDC, 12 VDC, or 18 VDC.

Setup is the _____ setpoint.

The _____ is the actual value that a control system experiences at any given time.

A(n) _____ is the desired value to be maintained by a building automation system.

A control system in which clean, oil-free, dry, compressed air, at the correct pressure, is used to provide power.

Global data is data required by _____ in a network

Closed loop control is control in which _____ occurs between the controller, sensor, and controlled devic

_____ are used in package unit applications such as fan coils, heat pumps, split systems, and ,rooftop units.

__ is the downloading of the proper response times into the controller and checking the response of the control system

Data is divided into _____ before being transmitted in an ethernet network.

_____ is the creation of software.

A _____ is the combination of putting together a building survey, documentation equipment and planning stages of upgrade