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Flashcards in M8ss#2 Deck (52):
1

Smallest baseboard size

500w

2

What limits room thermostat to overshoot gas-fired

Anticipator Resistor

3

Max overcurrent 30kw furnace

175A
#1

4

What would cause overheat safety thermostat in heat exchanger to operate

Blower motor not running
Clogged filter

5

Two baseboard heaters amperage

15.6a

6

Electric heater with oil fired furnace is

Plenum heater

7

Max overcurrent supply two or more baseboard heaters

30A

8

Thermostat controlling baseboard heaters marked with off must be

Two pole type

9

Installing heating cable under floor Can you cut off extra?

This is not permitted.

10

Part of furnace that separates combustion from air is.

Heat exchanger.

11

Safety gas valve in furnace controlled by

Thermocouple voltage

12

Gas safety valve in furnace is

Normally Closed

13

Prevent ozone, electric furnace interlocked with

Blower motor.

14

Electronic air cleaner installed in

Return duct
Between main filter
and furnace

15

In HVAC the device used to regulate flow

Damper

16

Double airflow, HP would increase by

8 times

17

Parallel blade damper

Adjacent blades
Same direction

18

Two types of valves

Two way
Three way

19

Typical set point temp.

13 degrees

20

Device that prevents outside damper from closing.

MP

21

Economizer control works when

Outside air is warmer than return

22

Freeze stat is considered

Manual reset device

23

Low voltage max value

100va

24

Three way mixing valve hot water common port

Heat exchanger coil supply.

25

Typical energy management

Optimal start/stop program

26

Interfaces with DDC and phone

Modem

27

Feature of DDC turns off loads

Demand limiting

28

Traditionally LAN category

DATA

29

Network topology most commonly used

Star topology

30

Cable install, name given to system that connects work area

Horizontal cabling.

31

Cable that runs from equipment room to telecommunication

Backbone cables

32

Terminations of backbone cables found in

Telecommunication closets

33

What are codes purpose

Protection of life, health, property

34

Section of CEC to find CATV

54

35

Diff between UTP and SeTP

SeTP provides protection

36

Which coaxial cables is limited to 500'

RG-6

37

Category rating system cable uses Ethernet

5c

38

Which FT rating must communication cable have

Ft4
Ft6

39

Which FT rating does not develop a vertical

FT4

40

Work areas normally cover an area

10 square meters

41

Pathways for telecommunication cables in concrete

Underfloor duct

42

Installing telecommunication cables in ceiling spaces, vertical spacing

3"

43

Number of cables that could be bunched together

15-20

44

Recommended pulling tension for CAT 5

25lbs

45

Max separation distance near fluorescent lighting.

12"

46

UTP communication cable, twisting of wires protect against

Electromagnetic interference

47

Without special permission, what is max conductor size in cellular floor

#0 or smaller

48

Are we allowed to install underfloor raceways?

No

49

Which writing pattern is recommended?

T568A

50

Primary coating

D

51

Can non conductive optical fiber cable be installed with 1000v

Yes

52

Min depth heating cables under driveway

50mm