Support Systems

Front 1

Silicone grease is usually
applied between the heat source and heat sink for better?

Back 1

thermotransfer

Front 2

honeycomb rf interference
filter is installed on both input and outlet to prevent

Back 2

stray rf from entering or leaving the equipment cabinet

Front 3

Some units of electronic equipment are hermetically sealed to prevent

Back 3

the entrance of moisture.

Front 4

ethylene glycol is added to the water to prevent

Back 4

freezing when the
system is exposed to freezing weather.

Front 5

Type I

Back 5

Seawater/distilled water(SW/DW) heat exchanger with SW/DW heat exchanger standby

Front 6

Type II

Back 6

SW/DW heat exchanger with a chilled water/distilled water (CW/DW) heat exchanger standby

Front 7

Type III

Back 7

CW/DW heat exchanger with a CW/DW heat exchanger standby

Front 8

Type I (SW/DW) systems are used for electronic system installations that can be operated satisfactorily with seawater temperature as high as?

Back 8

95°F

Front 9

Type I (SW/DW) systems result in a distilled water supply temperature to the electronics of approximately?

Back 9

104°F

Front 10

Type II (SW/DW,CW/DW) systems are used in installations that cannot accept a DW temperature higher than?

Back 10

90°F

Front 11

Type III(CW/DW) systems are used in installations where the temperature range is?

Back 11

critical

Front 12

The seawater is from the where and the chilled water is from the where?

Back 12

sea
ship’s air-conditioning plant

Front 13

seawater from a sea connection is pumped by what in one of the ship’s engineering spaces?

Back 13

seawater circulating pump

Front 14

duplex strainer purpose?

Back 14

to remove all debris and then through the tubes of a heat
exchanger

Front 15

it is discharged back into the sea at?

Back 15

an overboard discharge

Front 16

Another means of providing seawater is through the
ship’s firemain, the seawater is taken from the firemain through a duplex strainer and a?

Back 16

flow regulator (orifice plate) to and through the heat
exchanger.

Front 17

Seawater systems are referred to as open-looped or one-pass because?

Back 17

the seawater flows through the system only once

Front 18

A temperature regulating valve at the inlet of the heat exchanger regulates the flow of chilled water through the heat exchanger to?

Back 18

maintain the
required water temperature in the secondary system
(distilled water)

Front 19

The secondary cooling system is designed to?

Back 19

transfer heat from the electronic equipment being cooled to the primary cooling system

Front 20

The secondary system
is a?

Back 20

closed-loop water system

Front 21

The temperature regulating valve is installed to equipment for?

Back 21

partially bypass distilled
water around the seawater- to-distilled-water heat exchanger so that a constant water temperature can be
supplied to the electronic

Front 22

As the temperature in the distilled water increases, more water is directed to the what and less to the what?

Back 22

heat exchanger
bypass line

Front 23

The size of the heat exchanger is designed to handle?

Back 23

the full cooling load of the electronic equipment plus a 20 percent margin

Front 24

Is provided in the distilled water system to compensate for changes in the coolant
volume, and to provide a source of makeup water in the
event of a secondary system leak.

Back 24

expansion tank

Front 25

When the expansion
tank is located above the highest point in the secondary
system and vented to the atmosphere, it is called a?

Back 25

gravity tank

Front 26

If it is below the highest point in the secondary cooling system, then it is called a?

Back 26

compression tank

Front 27

demineralize is designed to ?

Back 27

remove dissolved metals, carbon dioxide, and oxygen

Front 28

is installed at the output of the demineralizer to prevent the carry-over of chemicals
into the system and to remove existing solids?

Back 28

submicron falter (submicron meaning less than one
millionth of a meter)

Front 29

Type II cooling system is similar to the Type I secondary coolant system and uses many of the same components. The major difference is?

Back 29

in the operation of the CW/DW heat exchanger

Front 30

A two-way temperature regulating valve is used in the primary cooling loop to regulate the temperature of the
secondary loop

Back 30

TYPE III COOLING SYSTEM

Front 31

In a Heat exchanger secondary coolant (distilled water) flows through the what, the
primary coolant (seawater or chilled water) flows
through the what?

Back 31

shell
tubes

Front 32

A what counterflow heat exchanger is more efficient than the what heat exchanger,
because there is a more uniform gradient of temperature difference between the two fluids?

Back 32

single-pass
double-pass

Front 33

Results because of dissimilar metals in the cooling system?

Back 33

electrolysis

Front 34

Used to prevent electrolysis?

Back 34

Zinc

Front 35

The expansion tank serves a threefold purpose in a
liquid cooling system.

Back 35

1. maintains a positive
pressure required on the circulating pump inlet for
proper operation of the circulating pump.
2. compensates for changes in the coolant volume because of temperature changes.
3. vents air from the system and provides a source of makeup coolant to compensate for minor losses because of
leakage or losses that occur during the replacement of
radar equipment served by the system.

Front 36

The sight glass should normally show the tank to be?

Back 36

2/3 to 4/5

Front 37

low-level alarm switch is usually set at what
percent of tank capacity?

Back 37

20%

Front 38

are used in the seawater cooling system to remove debris and sea life

Back 38

Strainers

Front 39

consists of a Y-pattern body housing a wire mesh basket.

Back 39

simplex basket strainer

Front 40

consists of two removable baskets located in parallel at the seawater inlet

Back 40

duplex strainer

Front 41

The purpose of the duplex gauge is to provide?

Back 41

a visual indication of a clogged strainer basket

Front 42

When the basket is clogged...

Back 42

the pressure reading is usually 5 to 10 psi above the clean-basket reading

Front 43

Acts as a spring-load to seat and hold the basket in the housing

Back 43

basket handle (spring handle)

Front 44

This valve used where seawater is the
primary cooling medium in the heat exchanger.

Back 44

three-way valve

Front 45

This valve is used where chilled water is the primary
cooling medium.

Back 45

two-way valve

Front 46

The three-way
regulating valve’s range of operation is within what
degrees of the setting on the valve?

Back 46

+ or - 5 degress

Front 47

contains a volatile liquid that vaporizes
and expands when heated.

Back 47

bulb

Front 48

is normally installed in the chilled water supply to
the heat exchanger with the thermostatic sensing bulb
installed in the distilled water outlet from the heat
exchanger.

Back 48

The two-way temperature regulating valve

Front 49

Both the three-way and two-way temperature regulating valves have a what to provide uninterrupted service?

Back 49

manual override feature

Front 50

simplest design of a flow
regulating device, consisting of a steel plate with a hole
in it.

Back 50

orifice plate

Front 51

with the chilled-water system This restricts the flow from the heat exchanger and keeps the heat exchanger fully submerged for greater efficiency

Back 51

constant flow regulator

Front 52

constant flow regulator ever used in Seawater?

Back 52

No because the internal parts would easily become fouled with marine growth and deposits

Front 53

is used to regulate a major section of the coolings system; whereas, the flow regulator is normally used to regulate an individual feeder line to an individual component or cabinet

Back 53

pressure-regulating valve

Front 54

is normally found in the secondary cooling system to
monitor the overall coolant flow.

Back 54

low-flow switch

Front 55

The main operating parts consist of a low flow switch?

Back 55

hermetically-sealed reed switch and a permanent magnet attached to an internal shuttle.

Front 56

is a variable area orifice
meter that functions by maintaining a constant
differential pressure with varying flow

Back 56

rotameter

Front 57

flowmeter as the
coolant approaches the contracted portion (throat) of the meter, its velocity must increase as it flows through the contracted zone.

Back 57

venturi-type

Front 58

works in the same manner as
the venturi flowmeter, but its construction is much
simpler and less expensive to manufacture

Back 58

orifice flowmeter

Front 59

Each cooling system has how many secondary distilled
water circulating pumps?

Back 59

two

Front 60

used in the liquid
cooling system are single-stage centrifugal pumps
closely coupled (pump is built onto the motor) to a
constant-speed electrical motor

Back 60

circulating pumps

Front 61

The
demineralize is sized so that what % of the cooling system
volume passes through the demineralize every hour.

Back 61

5%

Front 62

three different types of cartridges

Back 62

first cartridge is the organic removal cartridge.
second cartridge is the
oxygen removal cartridge.
third cartridge is the mixed-bed cartridge

Front 63

In this position, power is
removed from the sensor loop to facilitate maintenance.

Back 63

CUTOUT

Front 64

selector switch position simulates an alarm condition

Back 64

TEST

Front 65

This is the position for
acknowledging an alarm

Back 65

STANDBY

Front 66

is used primarily to
increase the dielectric constant inside the waveguide to prevent rf energy from arcing inside it.

Back 66

dry air

Front 67

high-power waveguide runs, the dry air pressure is approximately

Back 67

20 to 35 psig

Front 68

low-power waveguide applications, the dry air is
approximately

Back 68

1 to 8 psig

Front 69

Type 1 for dry air

Back 69

30 lb/inch2

Front 70

Type 2 for Dry air

Back 70

60 lb/inch2

Front 71

Type 3 for Dry air

Back 71

75 lb/inch2

Front 72

SPS-48 and SPS-49, are supplied with panels designed for

Back 72

80 to 125 lb/inch2

Front 73

dehydrator is used to remove the majority of the water and oil in both liquid and gaseous vapor forms from the air

Back 73

Type 1 dehydrator (refrigerant)

Front 74

Type II

Back 74

desiccant

Front 75

Type III

Back 75

(combination of refrigeration
and desiccant)

Front 76

high-power waveguide system requires dry air at apressure of what with a dew point of - at atmospheric pressure.

Back 76

25 to35 psig
40°F

Front 77

is the temperature at which water vapor begins to deposit as a liquid.

Back 77

Dew point

Front 78

is to remove oil and water in both forms, automatically and
continuously, and to deliver clean, very dry air for
pressurization of equipment waveguides.

Back 78

desiccant air dryer

Front 79

removes oil through a
combination of mechanical means and absorption

Back 79

telltale oil filter

Front 80

performs a cleaning step by a process known as adsorption.

Back 80

purifier-dehydrator

Front 81

difference between absorption
and adsorption.

Back 81

Absorption takes place in the telltale oil filter when
it removes oil by soaking it up as a liquid.
Adsorption is a surface and a molecular phenomenon. Mobile gaseous and liquid atoms or
molecules are attracted to the surface of any solid
because of unbalanced forces existing at the surface.

Front 82

The fluid separator and dump trap consist of two
interconnected assemblies

Back 82

separator and the automatic trap

Front 83

is a diaphragm-operated, pressure-reducing valve located downstream from the fluid separator and telltale oil filter.

Back 83

pressure regulator

Front 84

consists of two desiccant
chambers filled with desiccant in the form of small
spheres

Back 84

dehydrator

Front 85

In one 60-second period, each solenoid valve is open for XX seconds and closed for XX seconds.

Back 85

22
38

Front 86

is installed downstream
from the dryer to monitor the dew point of the dry air.

Back 86

moisture monitor probe