DDC Exam3 (NEW STUDY). With 100%
Correct Answers 2023 Update
timed override - ANS-A Time based supervisory control strategy which occupants
change a
... [Show More] zone from unoccupied to occupied mode temporary occupancy
high-priority load - ANS-Important to the operation of a building and shed last when
electrical demand goes up and re-energized first when electrical demand drops
economizer - ANS-An HVAC system that uses outside air for cooling
ALL (reduce operating and maintenance costs, enable more sophisticated control
strategies) - ANS-A retrofit may be desired to ?
Estimation - ANS-control is a control method that uses latest building temperature data
to estimate the actual start time to heat or cool a building before occupancy
Life safety supervisory control - ANS-A control strategy for life safety issues and has the
highest priority of all control strategies
Reset control - ANS-A direct digital control feature in which a primary setpoint is reset
automatically as another value changes
Optimum start - ANS-A supervisory control strategy in which the HVAC load is turned
ON as late as possible to obtain proper building space temperature at the beginning of
building occupancy
Tuning - ANS-The downloading of the proper response times into the controller and
checking the response of the control system
Commissioning - ANS-The process of adjusting and balancing an HVAC system for
maximum efficiency
above - ANS-Low limit control ensures that a controlled variable remains
____________a programmed value
Preventive - ANS-Maintenance is scheduled inspection and work required to maintain
equipment in peak operating condition
microprocessor panel - ANS-Most of todays new chillers come equipped from the
factory with a _________to be used as either an interface with a building automation
system or as a "stand alone" system
15 min, 30 min - ANS-Optimum stop is commonly limited to a specific length of time,
such as _________or__________
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