M8ss#2 Flashcards

(52 cards)

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

24
Q

Three way mixing valve hot water common port

A

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