ET VOL 8 CH 1,3 Flashcards Preview

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Flashcards in ET VOL 8 CH 1,3 Deck (91)
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1

2

Three of the four methods of cooling are forced-air, air-to-air, air-to-liquid. What is the fourth?

convection

3

When utilizing forced-air cooling, an air filter must be provided at the air outlet to remove dust and dirt from the exhaust air.

false

4

Heat is removed from the air passing by the heat producing source in an air-to-air cooling system by forcing it through what component?

3. Heat exchanger

5

Efficiency is increased in an airto- liquid cooling system by the use of what system component?

1. Liquid heat exchangers

6

What number of basic cooling systems make up a typical liquid cooling system?

2

7

The secondary cooling system transfers the heat load from the electronic equipment to the primary system.

true

8

The Navy uses what number of basic configurations of liquid cooling systems?

3

9

Which of the following water resources is/are used for primary cooling?

Seawater and chilled water

10

The cooling water for the primary cooling system is either seawater or chilled water. The seawater is from the sea and the chilled water is from what source?

The ship’s air conditioning plant

11

When temperature range is considered to be critical, what type of cooling system would most likely satisfy this need?

Type III (cw/dw heat exchanger with a cw/dw heat exchanger standby)

12

What type of liquid cooling system can satisfactorily be operated when seawater temperatures reach 95°F?

TYpe I (sw/dw heat exchanger with sw/dw heat exchanger standby

13

What is Type II Liquid cooling config?

SW/DW heat exchanger with CW/DW heat exchanger stby

14

In a primary cooling system, flow regulator may be known by what other term?

4. Orifice plate

15

Open looped seawater systems are also called one-pass because the seawater flows through the system only once.

true

16

Secondary cooling systems are which of the following types?

Closed-loop only

17

An expansion tank is installed in what system to compensate for changes in coolant volume?

3. The distilled water

18

What term best describes a expansion tank that is located above the highest point in the secondary system and vented to the atmosphere

4. Gravity tank

19

What term best describes an expansion tank that requires an air charge on the tank and is located below the highest point in the secondary cooling system?

Compression tank

20

What definition best describes the word submicron?

Less than one millionth of a meter

21

The Type II cooling system employs what configuration?

One SW/DW heat exchanger and one standby CW/DW heat exchanger

22

The Type III cooling system employs what configuration?

One CW/DW heat exchanger and one standby CW/DW heat exchanger

23

In a Type III cooling system, the two-way temperature regulating valve is used instead of a threeway valve to regulate the temperature in what system component(s)?

2. The secondary loop

24

Heat exchanger

is constructed to be shell-type and tube-type in which the secondary coolant flows through the shell, while the primary coolant flows through the tubes.

25

Flow regulators

It is used to provide a constant flow of coolant through the system

26

Expansion tank

It maintains a positive pressure on the circulating pump inlet, compensates for changes in the coolant volume and it vents air from the system.

27

Seawater strainer

It is used in the seawater cooling system to remove debris and sea life, which could clog the pressure and flow control devices.

28

Temperature regulating valve

It regulates the amount of cooling water flowing through or bypassing a heat exchanger to maintain a desired temperature of distilled water going to the electronic equipment

29

Circulating pump

It is used to circulate secondary distilled water

30

Demineralize

It maintains the secondary cooling system’s purity