Et A School Basic Alarms

Front 1

the subassemblies of alarm, safety, and warning systems

Back 1

audible and visual devices, sensing devices, alarm switchboard and panels

Front 2

what are the internal circuit on alarm, safety, and warning systems are for

Back 2

defines if the system needs to give an audible or visible signal

Front 3

3 alarm conditions

Back 3

normal, alarm, trouble

Front 4

current flow in alarm condition

Back 4

increase of current

Front 5

current flow in normal condition

Back 5

small continuous flow

Front 6

current flow in trouble condition

Back 6

not able to complete circuit

Front 7

name of the resistor that is installed parallel to the alarm contacts and is placed at the end of the circuit

Back 7

supervisory

Front 8

number of ohms is the supervisory resistor

Back 8

7000

Front 9

what alerts personnel to an alarm condition

Back 9

audio and visual devices

Front 10

where are buzzers used

Back 10

relatively quiet places

Front 11

what is the IC/Z1S4

Back 11

buzzers ac operated and have no contacts

Front 12

what horns use to produce a sound

Back 12

diaphrams

Front 13

2 devices can be both ac or dc operated

Back 13

bells and buzzers

Front 14

where sirens are used

Back 14

very noisy spaces

Front 15

what are audible signals supplemented by in noisy spaces

Back 15

visual signals

Front 16

why there are two lamps in parallel used with watertight lamp indicators

Back 16

in case one burns out

Front 17

what are the 2 types of sensing devices

Back 17

detectors and switches

Front 18

what are detectors used to sense

Back 18

gas or smoke

Front 19

where is the detector head installed of the ionization detector

Back 19

overhead of compartment

Front 20

what are the 2 conditions/settings of a switch

Back 20

normal and abnormal

Front 21

what are the seven switches

Back 21

Liquid level float, manual, mechanical, pressure, water, thermostatic, mercury thermostatic

Front 22

what is an IC/SM

Back 22

alarm switchboard

Front 23

a reed switch is what type of switch

Back 23

magnetically activated switch

Front 24

how does a liquid level float switch operate

Back 24

water rises in the switch causeing the float to rise and connect the circuit

Front 25

which switch is the only single pole double throw switch

Back 25

sensitive switch

Front 26

what are sensitive switches referred to as

Back 26

microswitches

Front 27

what IC/DM switch equipment controls the roller armature

Back 27

striker plate

Front 28

what should you isolate the supervisory alarm from when T/S a door mounted/mercury thermostatic/liquid level float switch

Back 28

IC/SM alarm switch board

Front 29

what is used to verify alarm circuits are de energized when you start to T/S

Back 29

multimeter

Front 30

what is the water switch used to detect

Back 30

activation of the magazine sprinkler system as well as any water in piping

Front 31

is sprinkler protection required for pyrotechnics that aresalt water actuated

Back 31

NO

Front 32

acts as a conductor shorting the two button contacts and activating the alarm in a water switch

Back 32

switch casing

Front 33

what are the most common faults associated with the water switch

Back 33

improper maintenance procedure including pinched wires and broken terminal lugs

Front 34

causes contacts to deteriorate with exposure

Back 34

saltwater connections

Front 35

what is the switch designation for the thermostatic switch

Back 35

IC/N

Front 36

what is the mechanically actuated thermostatic switch also known as

Back 36

temperature switch

Front 37

is a thermostatic switch only used in high temperature alarm systems

Back 37

NO

Front 38

what is the switch designation of the mercury thermostatic switch

Back 38

IC/J

Front 39

which switch detects a rise in temperature

Back 39

mercury thermostat switch

Front 40

type of tube for a mercury thermostatic switch

Back 40

Glass tube

Front 41

number of ocntacts that are in the sensing element of a mercury thermostatic switch

Back 41

3

Front 42

where is the 7k ohm resistor placed in the sensing element of the mercury thermostatic switch

Back 42

between the 2nd and 3rd contacts

Front 43

Red mercury thermostatic switch

Back 43

105 degrees F, Magazine

Front 44

Blue mercury thermostatic switch

Back 44

150 degrees F, messdecks, office, berthing

Front 45

Black mercury thermostatic switch

Back 45

125 degrees F, store rooms and paint lockers

Front 46

what is an IC/RL

Back 46

liquid Level float switch used for water

Front 47

what is an IC/RH

Back 47

liquid level float switch used for oil. reversible float included

Front 48

what are the components of an alarm panel

Back 48

bells and buzzers, fuses, grounding equip testing equip

Front 49

what must you do when working inside an alarm switchboard

Back 49

secure and tag out power

Front 50

how are pressure switch activated

Back 50

change in the pressure or vacuum of a gas orliquid

Front 51

what is the switch designation of a pressure switch

Back 51

IC/L

Front 52

how is the pressure switch operated

Back 52

by the bellows working against an adjustment spring

Front 53

what closes the switch contats when the operating pressure falls below a specified value, activating the alarm

Back 53

the spring

Front 54

can pressure switches by used in both high and low pressure systems

Back 54

YES

Front 55

three most commonly used pressure gauges

Back 55

0 to 15 psi/ 15 to 50 psi/ 50 to 100 psi

Front 56

what situations would you need to tag out the alarm circuit switch for a pressure or thermostatic switch

Back 56

when troubleshooting, repairing and replacement

Front 57

what situations would you need to tag out the associated equipment for a pressure or thermostatic switch

Back 57

replacement

Front 58

what is used to make switch adjustments during troubleshooting a pressure of thermostatic switch

Back 58

the high adjustment screw on side of switch

Front 59

what would you do if the switch does not close even after making adjustments with the higher adjustment screw

Back 59

replace the switch

Front 60

what is a burnishing tool used for

Back 60

cleaning switch contacts

Front 61

after replacing a pressure or thermostatic switch, how many tests should be conducted to ensure the switch opens and closes at the right set point

Back 61

several

Front 62

which mechanical switch is referred to as tamper proof

Back 62

IC/DM door mounted switch

Front 63

Circuit TD

Back 63

liquid level alarm

Front 64

Circuit HF

Back 64

air flow indicator and alarm

Front 65

Circuit FZ

Back 65

high security alarm

Front 66

Circuit FH

Back 66

magazine sprinkling alarm

Front 67

Circuit FD

Back 67

flooding alarm

Front 68

Circuit F

Back 68

Fire alarm (high temp alarm)

Front 69

Circuit DL

Back 69

Intrusion (secure communications space door alarm