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Int. > Alarms > Flashcards

Alarms Flashcards

(72 cards)

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1
Q

Sprinklers systems that have more then ____ sprinklers must be supervised

A

20

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2
Q

What is the minimum flow to generate an alarm

A

Flow equal to the smallest orifice in the system (1 sprinkler)

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3
Q

After sprinkler flow, alarm must activate within

A

5 minutes

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4
Q

Local alarm is for

A

Sprinkler system has operated

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5
Q

WMG pipe size

A

3/4 non corrosive pipe

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6
Q

Max height for WMG

A

20 feet

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7
Q

WMG Max horizontal distance

A

75 feet

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8
Q

Paddle type water flow devices should be ____ from a control valve and drain

A

24”

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9
Q

Paddle type water flow devices should be ____ from a change in direction

A

6”

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10
Q

Paddle flow switches are to be set too

A

Lowest possible time to avoid false alarms

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11
Q

Alarm test bypass is fed from

A

Below the clapper

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12
Q

Excess pressure pumps are

A

Positive displacement pumps

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13
Q

What kind of postive displacement pump are excess pressure pumps

A

External rotary gear pump

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14
Q

Max differential for excess pressure pump

A

75psi

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15
Q

What size is the relief valve and what is it set too on excess pressure pump

A

1/4” & 130psi

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16
Q

3 conditions on panel are

A

-Alarm
-Supervisory
-Trouble

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17
Q

Annunciators are installed at

A

Every entrance available to the fire department

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18
Q

Resistors are measured in

A

Ohms

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19
Q

Max amount of of sprinkler systems to be attached to one WMG

A

3

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20
Q

What is the limit of sprinkler systems to be attached to electronic gong

A

No limit

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21
Q

Paddle slow switch is set to approx. ____ from the factory

A

15 seconds

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22
Q

Minimum flow to activate paddle flow switch

A

10gpm

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23
Q

What is the max delay of a paddle flow switch

A

2 minutes

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24
Q

Clearance required for a paddle flow on horizontal pipe

A

12 inches + the size of pipe (mounted on TOP of pipe)

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25
Annunciator panel shall be located
At ground level, at the normal point the fire Dept. can access
26
Water level supervisory have ___ of fall and ____ rise
3 inches fall and 3 inches rise
27
Test and drain assemblies must have what size orifice installed in them
The equivalent to the smallest k factor head on the system
28
PS120 is typically installed as and on what system
Low pressure, wet system
29
PS40 is installed generally as what and on what system
Low air pressure, dry
30
PS10 is generally used as
Alarm switch
31
Gravity tanks do not require
High water level switch
32
Room temperature of valve room minimum is
40F
33
Water temp switch installed
24” below water level
34
Min and max for water temp switch
40F min Temp, 140F max temp
35
What water coloumn device automatically drains the water from the riser
Auto water column device
36
Minimum temperature for water reservoirs is
42F
37
Gravity tanks must have water level device installed ____ below the water
9 inches
38
Flow switch’s can be used on pipe 1-2” if you use
An adapter
39
Central Station signaling systems transmit a signal too
A constantly attended location located away from the property being supervised
40
Proprietary signal system sends alarm too
Constantly attended location that is on the property being supervised (something like a strip mall)
41
Auxiliary signal system sends alarm directly too
Fire department
42
Restoration signal is given from a valve when
The valve is Returned to its normal open position
43
When filing out a stem for a tamper switch, how deep is the groove
1/8”
44
What size and pipe thread is installed in a tank for the water level switch
1 1/2 National pipe thread
45
What kind of thermostat is in a water temperature switch
Bimettalic thermostat
46
Water temp device is to be installed how far from the water level device
12 inches
47
Number and type of alarms must be approved by
Insurance authority Municipality Fire department
48
Alarm valves connected to variable pressure water supply must have
Means of preventing false alarms (EPP, retard chamber, external bypass)
49
Variable supply pressures include
Municipal water supply Fire pumps
50
Max pressure for excess pressure pump
150psi
51
Relief valve max for excess pressure pump
130psi
52
Red hose on excess pressure pump goes too
Supply
53
If the paddle returns to normal position with a paddle switch what happens
Timer will reset
54
Remote station signalling send signal
Directly to fire dept. over private line
55
Red LED on panel Indicates
Alarm
56
Orange LED on panel indicates
Supervisory
57
Yellow LED on panel indicates
Trouble
58
Alarm equipment located outside must
Be listed for outside use
59
Fire alarm switches have 3 different contacts that are
Common (COM) Normally Open (NO) Normally Closed (NC)
60
WMG drains in 2 ways that are
-Out restricted orifice on alarm line -1” drain from the discharge end of WMG
61
All pre action systems require
Pull stations (elec, hydraulic or pneumatic)
62
Deluge systems must have a means for
Manual release (hydraulic )
63
What can the paddle be made of in a paddle type switch
Thin metal or plastic
64
What kind of DPV requires a water column device
Low differential
65
Waterflow switches must active at
7psi
66
Alarm valves have alarm piping connection
Below the water seat
67
Dry pipe valves have alarm connection
Connected to intermediate chamber (which has atmospheric pressure during normal operation) Alarm test connection is attached below the seat (supply)
68
WMG inspected and tested
Quarterly
69
Electric waterflow devices tested
Semi annually
70
Switch’s on sprinkler systems are usually wired
Normally open
71
Excess pressure pumps generally have there pressure set to ____ above city pressure
30-50 psi
72
PS10 pressure
4-15psi

Int. (7 decks)

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