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RCDD > TDMM Chapter 14 > Flashcards

TDMM Chapter 14 Flashcards

1
Q

AHU

A

Air Handling Unit

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2
Q

BAS

A

Building Automation System

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3
Q

BIM

A

Building Information Modeling

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4
Q

BMS

A

Building Management System

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5
Q

CP

A

Consolidation Point

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6
Q

DDC

A

Direct Digital Control

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7
Q

EAC

A

Electronic Access Control

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8
Q

ESS

A

Electronic Safety and Security

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9
Q

EMS

A

Energy Management System

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10
Q

EOLR

A

End of Line Resistor
A resistor that permits active monitoring of a two wire circuit by using low level current to etect a short or break

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11
Q

HC (FD)

A

Horizontal Cross Connect (Floor Distributor)

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12
Q

HCP

A

Horizontal Connection Point
A device in a BAS system that allows coverage area connections to be reconfigured

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13
Q

IB

A

Intelligent Building

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14
Q

IP

A

Internet Protocal

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15
Q

MC (CD)

A

Main Cross Connect (Campus Distributor)

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16
Q

MPTL

A

Modular Plug Terminated Link
A copper cable with an RJ45 jack on ine end and plug on the other

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17
Q

ROI

A

Return on Investment

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18
Q

SCADA System

A

Supervisory Control and Data Acquisition System
A control system, consists of programmable logic controllers (plc), data input and software

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19
Q

TCP

A

Transmission Control Protocol

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20
Q

Name the two systems that are the basis of an intelligent building (IB)

A
  • Building Automation System (BAS)
  • Building Management System (BMS)
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21
Q

Name six functions of the BAS

A
  • HVAC
  • EMS
  • Lighting Control
  • Window and Shade Control
  • Digital Signage
  • Security
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22
Q

Name two benefits of using a common cabling system for voice, data and BAS systems

A
  • Reduces construction and operating costs
  • Creates an opportunity for IB (Intelligent Building)
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23
Q

Name four features that power limited (low voltage) systems have in common

A
  • Telecom cabling
  • Transmission characteristics
  • Pathway requirements
  • Common codes/standards
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24
Q

How often are BAS products and technologies typically updated?

A

Every five to seven years

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25
Q

What is the typical life cycle of a building structure?

A

Forty plus years

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26
Q

What is the typical life cycle of an office automation system?

A

One to three years

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27
Q

What is the typical life cycle of the telecom infrastructure in a building?

A

Three to five years

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28
Q

Name three important considerations when selecting a BAS

A
  • Flexibility
  • Scalability
  • Functionality
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29
Q

Name four standard features of a BAS

A
  • Common Interface
  • Open system standards
  • Internet technology
  • Advanced Integration
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30
Q

How much can a total systems integration approach reduce the costs of cabling related changes?

A

By 25 to 40 percent

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31
Q

Name three benefits of ICT technologies

A
  • Easier software updates
  • Reduced maintenance
  • Local operation requires only a browser
32
Q

Name two operational benefits of EAC/BAS integration

A
  • Sharing database records
  • Having only one cabling system to administer
33
Q

Name five benefits of a correctly designed HVAC control system

A
  • Comfortable environment
  • Optimized energy consumption
  • Improved employee productivity
  • Control of smoke in case of fire
  • Supports better operations of telecom equipment
34
Q

What does digital in digital device control (DDC) reference?

A

The digital processing of data

35
Q

Name five common strategies used by EMCs to control and monitor power

A
  • Scheduling
  • Peak demand load shedding
  • Event initiated control
  • Energy consumption and demand monitoring
  • Optimal starting and stopping of equipment
36
Q

Name two items utility companies use as the basis of the monthly electricity charges for commercial facilities

A
  • Consumption
  • Demand
37
Q

What is the basis of a consumption charge?

A

The total amount of electricity used during the monthly period

38
Q

How do most companies calculate demand?

A

By measuring the electricity being used during any fifteen minute interval during the monthly billing period

39
Q

Which EMS program minimizes HVAC operating time by calculating how to achieve occupancy temperature at the start of the day?

A

Optimum Start

40
Q

What is the purpose of an optimum stop program for an EMS?

A

To minimize HVAC operating time by calculating how long stored energy can maintain occupancy temperature at the end of the day

41
Q

How do night cycle programs maintain temperature limits during periods when the facility is unoccupied

A

By closing outside dampers and cycling ai r handling units

42
Q

What does a night purge program use to pre cool the building before the mechanical system is turned on?

A

Cool night outside air

43
Q

Which program ensures that only the minimum amount of cooling or heating is used?

A

Load reset

44
Q

Describe how a zero energy band program works in an EMS

A

It creates a dead band where neither heating or cooling is used

45
Q

Lighting may account for up to what percent of the electrical operating costs in a commercial building?

A

Forty percent

46
Q

Name two advantages associated with using low voltage timers for a lighting control system

A
  • Safer than high voltage timers
  • More cost effective than high voltage timers
47
Q

What is one of the simplest forms of lighting control

A

Fixed power reduction

48
Q

What is an important safety consideration when using occupancy based lighting control?

A

Should be easily controlled in entry and exit areas after work hours

49
Q

Why do vacancy sensors save more energy than occupancy sensors?

A

Because occupants determine when lighting is needed

50
Q

Where is daylight harvesting typically used?

A

In new buildings

51
Q

What is an advantage of using demand limiting

A

Provides a kilowatt reduction directionally proportional to amount of lights dimmed and is unnoticeable by occupants

52
Q

What is the objective of BAS?

A

To centralize and simplify building monitoring, control, operation and management

53
Q

Name the three hierarchical levels of microprocessor based BAS controllers

A
  • Field level controllers
  • System level controllers
  • Management level processors
54
Q

Why are field level controllers networked on a bus?

A

So information can be shared with processors at the system and management levels

55
Q

How do system level controllers respond if the communications bus is lost?

A

The controller will operate in standalone mode to provide system survivability

56
Q

What are the primary tasks performed by the management level processor?

A

Collect, store and process historical data that provide a tool for the long term management and use of a facility

57
Q

What does BAS software determine?

A
  • How the data interaction takes place
  • How the data is displayed
  • How printer output is formatted
58
Q

Why are communications protocols an essential element of BAS configuration?

A
  • Because of the amount of data being transferred from ome point to another
59
Q

What type of communications protocol did early BAS use?

A

Poll response protocols

60
Q

What type of communications protocol do most BAS use today?

A

Peer protocols

61
Q

Name four types of signals transmitted and received by BAS controllers

A
  • Analog inputs
  • Analog outputs
  • Digital inputs
  • Digital outputs
62
Q

What type of sensor sends a two state, on-off, or two position signal to a controller?

A

Digital input

63
Q

How does a BAS device control a specific function?

A

By using input from a device and output from a controller

64
Q

Which sections of the specifications have traditionally been used to specify cabling for the BAS?

A

The mechanical and electrical sections

65
Q

Name three met hods for connecting a BAS device to the horizontal cabling in a star topology

A
  • A coverage area cable and a BAS outlet
  • A coverage area cable and an HCP
  • The horizontal link terminated directly to the BAS connector
66
Q

What is the typical size of a coverage area in a commercial building?

A

~ 23 sqm (248 sqft)

67
Q

What is the typical size of a coverage area in a commercial indoor parking area?

A

One coverage area every 50sq m (538sqft)

68
Q

What is the typical size of a coverage area in a mechanical room?

A

One cover area every 5sq m (54sqft)

69
Q

What is the purpose of an HCP?

A

To allow a coverage area connections to be reconfigured

70
Q

How many HCPs should be placed in a horizontal link?

A

No more than one

71
Q

True or False
The functions of a CP/HCP can be combined within the same zone box

A

True

72
Q

How many links should an HCP serve?

A

A maximum of twelve

73
Q

Should BAS signals share the same horizontal cable as telecommunications signals?

A

No, they should not share the same cable

74
Q

Can BAS and telecom signals share the same backbone cable?

A

Yes, but should not be in the same binder in a multipair cable

75
Q

Name three factors that are used to calculate BAS backbone distribution system requirements

A
  • Number of pairs required for each device or branch
  • Number of systems to be integrated with a minimum of one binder group for each system
  • Distance limitations of the devices
76
Q

What type of intelligence do most modern BAS use?

A

Distributed Intelligence

77
Q

Hoe should balanced twisted pair cross connections for BAS services be indentified?

A

With a different colored conductor than voice or data

RCDD (17 decks)

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