Chapter 14

Question 1

John would like to use an HVAC control system. Which of the following is not a function of an HVAC control system?

a. provides safe operation of equipment
b. establishes a final condition
c. increases the need for ongoing personnel attention
d. ensures economical operation

Answer 1

c. increases the need for ongoing personnel attention

Question 2

In learning about HVAC control systems, Meredith discovers that ______ are devices that transmit a signal by way of pneumatics, electronics, or resistance to control a damper or valve.

Answer 2

sensors

Question 3

Tony, a facilities manager, explained to the building owner that the building's control system uses compressed air to modulate the device being controlled. Which category of control system does this describe?
a electronic
b. BAS
c. DDC
d. pneumatic

Answer 3

pneumatic

Question 4

Proportional control of a ______, located close to either the chiller or the cooling tower, ensures that enough water is sent to the tower to achieve the desired cooling result.

a. bypass valve
b. fan
c. damper
d. combination of bypass valve, fan, and damper

Answer 4

a. bypass valve

Question 5

In order to keep building occupants comfortable, Jake knows that air volume at a specific temperature must be controlled. If the volume of the air-steam fluctuates, and the air is controlled at a relatively constant temperature and moisture content, what type of air volume system is being used.

a. variable-air-volume
b. constant-air-volume
c. controlled-air-volume
d. continuous-air-volume

Answer 5

a. variable-air-volume

Question 6

jan knows that automated control systems have progressed a long way since their inception, and she would like to use the most up-to-date system in her new building. Jan would most likely select a

a. energy management system.
b. seperate, automated system with centralized, automated monitoring.
c. environmental management system.
d. intelligent building system.

Answer 6

d. intelligent building system

Question 7

DDC systems can monitor how fast the temperature in a given zone is changing or drifting from the design temperature, enabling the CPU to calculate when corrections will be needed and to initiate them sooner. This is an example of which advantage of DDC over analog systems?

a. direct signal reading
b. better control
c. user-friendliness
d. ability to anticipate

Answer 7

d. ability to anticipate

Question 8

Within the building’s HVAC control system, a property mangaer can monitor the controls of one manufacturer from the system of another, but canot operate them. This demonstrates:

a. connectivity only
b. interoperability only
c. both connectivity and interoperability
d. neither connectivity or interoperability

Answer 8

a. connectivity only

Question 9

By using the _______ feature, a facilities manager may have the ability to create saving on electric bills by shedding deferrable loads.

a. OST
b. duty cycling
c. demand limiting
d. VAV

Answer 9

c. demand limiting

Question 10

Frank is looking for an energy-savings process that discontinues the operation of the mechanical cooling system when the outdoor temperature falls below a predetermined temperature setting. What optimal HVAC control feature should Frank use?
a. duty cycling
b. economizer switchover cycle
c. demand limiting
d supply-air reset

Answer 10

b. economizer switchover cycle

Question 11

DDc systems can provide detailed information about specific aspects of the facility. This is an example of which DDC feature?

a. summaries
b. alarm reporting
c. trending
d. Totalization

Answer 11

a. Summaries