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Zebras > Alarms > Flashcards

Alarms Flashcards

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
Q

Annunciator panel shall be located

A

At ground level, at the normal point the fire Dept. can access

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26
Q

Water level supervisory have ___ of fall and ____ rise

A

3 inches fall and 3 inches rise

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27
Q

Test and drain assemblies must have what size orifice installed in them

A

The equivalent to the smallest k factor head on the system

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28
Q

PS120 is typically installed as and on what system

A

Low pressure, wet system

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29
Q

PS40 is installed generally as what and on what system

A

Low air pressure, dry

30
Q

PS10 is generally used as

A

Alarm switch

31
Q

Gravity tanks do not require

A

High water level switch

32
Q

Room temperature of valve room minimum is

A

40F

33
Q

Water temp switch installed

A

24” below water level

34
Q

Min and max for water temp switch

A

40F min Temp, 140F max temp

35
Q

What water coloumn device automatically drains the water from the riser

A

Auto water column device

36
Q

Minimum temperature for water reservoirs is

A

42F

37
Q

Gravity tanks must have water level device installed ____ below the water

A

9 inches

38
Q

Flow switch’s can be used on pipe 1-2” if you use

A

An adapter

39
Q

Central Station signaling systems transmit a signal too

A

A constantly attended location located away from the property being supervised

40
Q

Proprietary signal system sends alarm too

A

Constantly attended location that is on the property being supervised (something like a strip mall)

41
Q

Auxiliary signal system sends alarm directly too

A

Fire department

42
Q

Restoration signal is given from a valve when

A

The valve is Returned to its normal open position

43
Q

When filing out a stem for a tamper switch, how deep is the groove

A

1/8”

44
Q

What size and pipe thread is installed in a tank for the water level switch

A

1 1/2 National pipe thread

45
Q

What kind of thermostat is in a water temperature switch

A

Bimettalic thermostat

46
Q

Water temp device is to be installed how far from the water level device

A

12 inches

47
Q

Number and type of alarms must be approved by

A

Insurance authority
Municipality
Fire department

48
Q

Alarm valves connected to variable pressure water supply must have

A

Means of preventing false alarms
(EPP, retard chamber, external bypass)

49
Q

Variable supply pressures include

A

Municipal water supply
Fire pumps

50
Q

Max pressure for excess pressure pump

A

150psi

51
Q

Relief valve max for excess pressure pump

A

130psi

52
Q

Red hose on excess pressure pump goes too

A

Supply

53
Q

If the paddle returns to normal position with a paddle switch what happens

A

Timer will reset

54
Q

Remote station signalling send signal

A

Directly to fire dept. over private line

55
Q

Red LED on panel Indicates

A

Alarm

56
Q

Orange LED on panel indicates

A

Supervisory

57
Q

Yellow LED on panel indicates

A

Trouble

58
Q

Alarm equipment located outside must

A

Be listed for outside use

59
Q

Fire alarm switches have 3 different contacts that are

A

Common (COM)
Normally Open (NO)
Normally Closed (NC)

60
Q

WMG drains in 2 ways that are

A

-Out restricted orifice on alarm line
-1” drain from the discharge end of WMG

61
Q

All pre action systems require

A

Pull stations (elec, hydraulic or pneumatic)

62
Q

Deluge systems must have a means for

A

Manual release (hydraulic )

63
Q

What can the paddle be made of in a paddle type switch

A

Thin metal or plastic

64
Q

What kind of DPV requires a water column device

A

Low differential

65
Q

Waterflow switches must active at

A

7psi

66
Q

Alarm valves have alarm piping connection

A

Below the water seat

67
Q

Dry pipe valves have alarm connection

A

Connected to intermediate chamber (which has atmospheric pressure during normal operation)

Alarm test connection is attached below the seat (supply)

68
Q

WMG inspected and tested

A

Quarterly

69
Q

Electric waterflow devices tested

A

Semi annually

70
Q

Switch’s on sprinkler systems are usually wired

A

Normally open

71
Q

Excess pressure pumps generally have there pressure set to ____ above city pressure

A

30-50 psi

72
Q

PS10 pressure

A

4-15psi

Zebras (7 decks)

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