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School > M8ss#2 > Flashcards

M8ss#2 Flashcards

1
Q

Smallest baseboard size

A

500w

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2
Q

What limits room thermostat to overshoot gas-fired

A

Anticipator Resistor

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3
Q

Max overcurrent 30kw furnace

A 
175A
#1
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4
Q

What would cause overheat safety thermostat in heat exchanger to operate

A

Blower motor not running

Clogged filter

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5
Q

Two baseboard heaters amperage

A

15.6a

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6
Q

Electric heater with oil fired furnace is

A

Plenum heater

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7
Q

Max overcurrent supply two or more baseboard heaters

A

30A

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8
Q

Thermostat controlling baseboard heaters marked with off must be

A

Two pole type

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9
Q

Installing heating cable under floor Can you cut off extra?

A

This is not permitted.

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10
Q

Part of furnace that separates combustion from air is.

A

Heat exchanger.

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11
Q

Safety gas valve in furnace controlled by

A

Thermocouple voltage

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12
Q

Gas safety valve in furnace is

A

Normally Closed

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13
Q

Prevent ozone, electric furnace interlocked with

A

Blower motor.

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14
Q

Electronic air cleaner installed in

A

Return duct
Between main filter
and furnace

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15
Q

In HVAC the device used to regulate flow

A

Damper

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16
Q

Double airflow, HP would increase by

A

8 times

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17
Q

Parallel blade damper

A

Adjacent blades

Same direction

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18
Q

Two types of valves

A

Two way

Three way

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19
Q

Typical set point temp.

A

13 degrees

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20
Q

Device that prevents outside damper from closing.

A

MP

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21
Q

Economizer control works when

A

Outside air is warmer than return

22
Q

Freeze stat is considered

A

Manual reset device

23
Q

Low voltage max value

A

100va

24
Q

Three way mixing valve hot water common port

A

Heat exchanger coil supply.

25
Q

Typical energy management

A

Optimal start/stop program

26
Q

Interfaces with DDC and phone

A

Modem

27
Q

Feature of DDC turns off loads

A

Demand limiting

28
Q

Traditionally LAN category

A

DATA

29
Q

Network topology most commonly used

A

Star topology

30
Q

Cable install, name given to system that connects work area

A

Horizontal cabling.

31
Q

Cable that runs from equipment room to telecommunication

A

Backbone cables

32
Q

Terminations of backbone cables found in

A

Telecommunication closets

33
Q

What are codes purpose

A

Protection of life, health, property

34
Q

Section of CEC to find CATV

A

54

35
Q

Diff between UTP and SeTP

A

SeTP provides protection

36
Q

Which coaxial cables is limited to 500’

A

RG-6

37
Q

Category rating system cable uses Ethernet

A

5c

38
Q

Which FT rating must communication cable have

A

Ft4

Ft6

39
Q

Which FT rating does not develop a vertical

A

FT4

40
Q

Work areas normally cover an area

A

10 square meters

41
Q

Pathways for telecommunication cables in concrete

A

Underfloor duct

42
Q

Installing telecommunication cables in ceiling spaces, vertical spacing

A

3”

43
Q

Number of cables that could be bunched together

A

15-20

44
Q

Recommended pulling tension for CAT 5

A

25lbs

45
Q

Max separation distance near fluorescent lighting.

A

12”

46
Q

UTP communication cable, twisting of wires protect against

A

Electromagnetic interference

47
Q

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

A

0 or smaller

48
Q

Are we allowed to install underfloor raceways?

A

No

49
Q

Which writing pattern is recommended?

A

T568A

50
Q

Primary coating

A

D

51
Q

Can non conductive optical fiber cable be installed with 1000v

A

Yes

52
Q

Min depth heating cables under driveway

A

50mm

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