IDA-101 Chapter 2 — Control Concepts Building Controls

A(n) ___ is used for monitoring or changing system variables, making control decisions, and interfacing with other types of systems.

• relay

• actuator

• temperature sensor

• control device

Human-machine interfaces are either hardware-based or ___-based.

• open-loop

• closed-loop

• software

• derivative

A control point is a(n) ___ in a control system.

• constant

• center point

• virtual point

• actual value

In a(n) ___ control system, decisions are made based only on the current state of the system and a model of how it should work.

• open-loop

• closed-loop

• HVAC

• proportional

___ is the adjustment of control parameters for the desired control response.

• Virtual variables

• Tweaking

• Tuning

• Realigning

A(n) ___ is a sequence of instructions for producing the optimal result to a problem.

• algorithm
• building automation system

• protocol

• relay

____ is especially used in commercial buildings that have a large number of electric baseboard heaters or small exhaust fans.

• Optimum start/stop control

• Life safety control

• Temporary scheduling

• Duty cycling

____ alarms are reported immediately to multiple maintenance personnel for a quick response.

• Critical

• Noncritical

• Minor

• Preventive maintenance

A ____ control can be used to prevent a water temperature from exceeding 210°F.

• setback

• lead/lag

• high-limit

• reset

____ is an oscillation of output resulting from feedback that changes from positive to negative.

• Surging

• Hunting

• Gathering

• Shorting