Three of the four methods of cooling are forced-air, air-to-air, air-to-liquid. What is the fourth?
When utilizing forced-air cooling, an air filter must be provided at the air outlet to remove dust and dirt from the exhaust air.
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
Efficiency is increased in an airto- liquid cooling system by the use of what system component?
1. Liquid heat exchangers
What number of basic cooling systems make up a typical liquid cooling system?
The secondary cooling system transfers the heat load from the electronic equipment to the primary system.
The Navy uses what number of basic configurations of liquid cooling systems?
Which of the following water resources is/are used for primary cooling?
Seawater and chilled water
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
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)
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
What is Type II Liquid cooling config?
SW/DW heat exchanger with CW/DW heat exchanger stby
In a primary cooling system, flow regulator may be known by what other term?
4. Orifice plate
Open looped seawater systems are also called one-pass because the seawater flows through the system only once.
Secondary cooling systems are which of the following types?
An expansion tank is installed in what system to compensate for changes in coolant volume?
3. The distilled water
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
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?
What definition best describes the word submicron?
Less than one millionth of a meter
The Type II cooling system employs what configuration?
One SW/DW heat exchanger and one standby CW/DW heat exchanger
The Type III cooling system employs what configuration?
One CW/DW heat exchanger and one standby CW/DW heat exchanger
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
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.
It is used to provide a constant flow of coolant through the system
It maintains a positive pressure on the circulating pump inlet, compensates for changes in the coolant volume and it vents air from the system.
It is used in the seawater cooling system to remove debris and sea life, which could clog the pressure and flow control devices.
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
It is used to circulate secondary distilled water
It maintains the secondary cooling system’s purity