IC basics Flashcards
What is a class 2 IC system?
- energized when the ship is preparing to get underway/while underway
- combined with class 1 are essential to satisfactory to ship control.
What is a class 1 IC system?
- energized at all times
- essential to the safety of the ship/personnel
What is class 3 IC systems?
- energized during condition watches/operations
- combined with class 1/2 and are essential to interior control
What is a class 4 IC system?
Only energized when required
Readiness classification on IC switchboard plates?
Class 1: yellow
Class 2: black
Class 3: red
Class 4: white
What alarm color is for the general alarm?
Red
What alarm color is for the chemical alarm?
Green
What alarm color is for the sonar alarm?
Yellow
What alarm color is for the collision alarm?
Yellow
What alarm color is for the power plant alarm?
White
What alarm color is for the missile jettison alarm?
Blue
What alarm color is for the missile emergency?
Orange
IC switchboard power distribution
60 hz, 120v, 3-phase/single phase
400 hz, 120v, 3-phase
DC, 28/50
IC switchboard are used for?
Energized interior communication systems
Types of fuses in the IC switchboard
F03a/b- plastic or ceramic with silver plated ferrules
F03A
Has instantaneous blow characteristics
F03B
Has time delay characteristics
Types of telephone equipment installed
- sound powered
- dial telephones
- IVCS
- misc equipment
Sound powered
Uses audio energy from speakers voice. Audio energy is converted into electrical energy by the transmitter
H-203/U- headset
- Primarily for one-to-one talking
- transmitter/receiver units are interchangeable
H-200/U- headset/chestset
Designed for general use
H-201/U- headset
Used by plotters and console operators
H-202/U-headset/chestset
Used in high noise areas
Types of ways to control sound powered system
- switchboard type
- switch box type
- string type
Switchboard type
Controls the sound powered system from the IC switchboard
Switch box types
Sound powered is controlled from a switch-box located at the principal station of the circuit
string type
Where all sound powered stations are connected in parallel
Switchboard circuits
- have cutout switches on the sound powered switchboards
- done in parallel
Switch box
Consist of several line cutout switches in a switch box
String circuit
Are a series of jack boxes connected in parallel with no switches to cut out a station
Types of switching mechanisms commonly used are:
- Automatically electric strowger switch
- Stromberg-Carlson X-Y universal switch
- Dynalec crossbar switch
EM/MJ signal equipment
- 16 ring stations
- EM: provides for selective calling station on a common talk circuit
- MJ: provides for selective calling and selective talk circuits
Manual switches
Used in alarm circuits to initiate the alarm
Mechanical switches
Operated by the movement of mechanisms such as shafts, valves, or doors.
Pressure and vacuum switches
Contain either a bellows or diaphragm working against an adjustable spring
Temperature operated switches
Has bellows which extends or retracts against as a sealed liquid expands or contracts with the rise or fall in temp
Types of IC/Js
- 105
- 125
- 150
Liquid level switch
Contain a magnetic core which operates a reed switch as the float increases or decreases.
Flow switches
Installed in fluid lines to sense fluid flow
Water switches
Installed in dry pipe magazine sprinkling or flooding systems
Infrared detectors
- sense flame only
- activated when flicker rate is between 8hz and 15hz
IC/SM alarm module accepts an input from a sensing element with a resistance of?
6800-7000 ohms
What causes an alarm to sound
A short
Normal mode if IC/SM
- Top half is lit
- Bottom is unlit
- No tone
Standby mode of IC/SM
- Top is lit
- Bottom is lit
- Wailing tone
Cut-out mode of IC/SM
- Top is unlit
- Bottom is lit
- No tone
Test mode of IC/SM
- Top is lit
- bottom is
