Et A School Aux

Front 1

problems that the use of pressurized dry air decreases

Back 1

corrosion, contamination, and moisture collection

Front 2

Type one dry air system

Back 2

refridgerant

Front 3

type two dry air system

Back 3

desiccant

Front 4

type three dry air system

Back 4

combination of one and two

Front 5

piece of equipment is used with the dehydrators in dry air systems

Back 5

low pressure air compressors

Front 6

what happens to relative humidity as air is compressed

Back 6

increases

Front 7

purpose of two dehydrators on a ship

Back 7

one is to be regularly used the other is for emergencies

Front 8

large ships have how many dehydrators

Back 8

four

Front 9

controls and regulates pressure to the electronic user equipment

Back 9

air control panels

Front 10

local dehydrators are used

Back 10

only in battle

Front 11

pressurized dry air has what influence on dielectric strength

Back 11

increases strength

Front 12

delivers very clean dry air for pressurization of equipment waveguides

Back 12

desiccant air dryer

Front 13

psi ratings for HP air

Back 13

20-35 psi

Front 14

dew point ratings for HP air

Back 14

negative 40 degrees F

Front 15

HP air is likely to reduce

Back 15

likelihood of arcing

Front 16

psi for LP air

Back 16

1-8 psi

Front 17

LP air is used to prevent

Back 17

corrosion and contamination inside the waveguide

Front 18

moisture probes are used for

Back 18

Monitor the dew point of the dry air

Front 19

moisture removal method freezes the air

Back 19

refrigerant

Front 20

desiccant method causes the air to become

Back 20

electronic dry

Front 21

fluid separators do what

Back 21

extracts most of the free liquids from the air stream

Front 22

removes oil from the air during the absorption cleaning process

Back 22

oil filter

Front 23

most important unit of the system

Back 23

purifier dehydrator

Front 24

what is used iinstead of chemicals during eh nonchemical membrane method process

Back 24

osmosis

Front 25

can cause a change in the operating parameters and failure of electronic parts

Back 25

heat generated from electronic equipment

Front 26

convection relies on what for cooling

Back 26

natural airflow

Front 27

added to heat producing parts to increase heat dissipation

Back 27

finned heat sinks

Front 28

what is used to draw cool air in during the forced air method

Back 28

a blower

Front 29

method that is used to cool electronic equipment that has airtight sealed components

Back 29

air to air

Front 30

what do air liquid cooling systems use to shut down equipment to prevent overheating

Back 30

built in safety devices

Front 31

in the liquid coolingsystem which loop provides the initial source of cooling water

Back 31

primary cooling systme

Front 32

type one temperature limit

Back 32

95 degrees F

Front 33

type two temperature limit

Back 33

90 degrees F

Front 34

cooling water used in primary loops

Back 34

seawater/chilled water

Front 35

cooling water used in secondary loops

Back 35

distilled water

Front 36

four components of a primary loop

Back 36

seawater strainers, flow regulators, chilled water temp valves, heat exchangers

Front 37

types of seawater strainers

Back 37

simplex and duplex

Front 38

strainer that requires the water be turned off with the valve before doing maintenance

Back 38

seawater simplex strainer

Front 39

type of valve is the CW temperature regulating valve

Back 39

two way

Front 40

where is the hottest water found in the system

Back 40

at the distilled water inlet

Front 41

point where the primary and the secondary systems come together

Back 41

heat exchanger

Front 42

keeps the heat exchanger fully submerged for greater efficiency and heat transfer

Back 42

constant flow regulator

Front 43

steel plate with a hope in it that controls the volume of water

Back 43

orifice plate

Front 44

CW temperature regulating valve regulates

Back 44

flow of chilled water through the heat exchanger to maintain the water temp in secondary system

Front 45

where is the heat that has been absorbed by distilled water flowing through the electronic components in the secondary system transferred to

Back 45

primary cooling system

Front 46

why does a cooling system have 2 heat exchangers

Back 46

one is active the other is standby for emergencies

Front 47

components of the secondary loop

Back 47

distilled water circulating pump, expansion tank, demineralizer, temp control valves

Front 48

components of the secondary loop

Back 48

heat exchangers, monitored equip with associated alarms, electric equip being cooled

Front 49

why are there 2 DW circulating pumps

Back 49

one is in service the other is standby for emergencies

Front 50

what interconnects the ships service generators and distribution switchboards.

Back 50

bus ties

Front 51

what does the ac power distribution system consist of

Back 51

440V, 60 Hz, 3 phase, 3 wire, ungrounded systems

Front 52

link between the ships source of electrical power and the ships electrical loads

Back 52

power distribution system

Front 53

how are many suspected equipment casualties corrected

Back 53

restoring power, signal reference

Front 54

how to trouble shoot missing power input

Back 54

working backward from load to source

Front 55

where do newer ships get there supply of 400 hz of power from

Back 55

60/400 Hz static converters

Front 56

primary source of most weapon systems

Back 56

400 Hz, 440V, 3Phase

Front 57

what is 440V, 60 Hz, 3 phase power converted to by transformers

Back 57

115V, 60 Hz, 3 phase power

Front 58

where is 60 Hz power supplied from respectively

Back 58

service generators

Front 59

where is 400 Hz power supplied from respectively

Back 59

motor generator sets

Front 60

type of tank that uses pressurized air

Back 60

pressurized tank

Front 61

expansion tank that is located above the highest point in the distilled water system

Back 61

gravity tanks

Front 62

three types of flow regulators in the secondary loop

Back 62

equip flow, pressure regulator valve, constant flow

Front 63

type of valve is the temperature regulating valve

Back 63

three way valve

Front 64

main purpose is to maintain a desired temperature of distilled water for the electronic equipment

Back 64

temperature regulator valves

Front 65

which feeder provides power supply when normal and alternate feeder power is lost

Back 65

emergency feeder

Front 66

can be used to help determine which source of power is being used

Back 66

(csoss) combat systems operation sequence system

Front 67

why is emergency power distribution vital to the survival of a ship

Back 67

provides a continuous source of power when primary source is lost

Front 68

number of zones an emergency switchboard may provide for

Back 68

more than one

Front 69

when will an emergency generator start automatically

Back 69

when auto is turned on, and normal loss is detected

Front 70

responsible for the operation of the ships service generators, emergency generators, and distributing switchboards

Back 70

(EN,MM,EM)

Front 71

provides the means for making temporary connections to vital circuits equiptment

Back 71

casualty power system