Cooling Systems

Question 1

What are the two reasons for fresh water circulation systems?

Answer 1

Machinery is susceptible to salt water corrosion.

Other equipment can be effected by salt water contamination.

Question 2

How is lubricant and coolant cooled?

Answer 2

With sea water via a heat exchanger.

Question 3

What temperature will white metal bearings melt at?

Answer 3

115 degrees c

Question 4

What can happen if machinery is not cooled correctly?

Answer 4

Cause fires
Equipment failure
Wiping of bearings
Equipment seizing

Question 5

What machinery is supplied by the main propulsion cooling system?

Answer 5

Lub oil heat exchanger
Gas turbine heat exchanger
CPP unit heat exchanger
Plummer block heat exchanger

Question 6

What type of system is a cooling circulation system?

Answer 6

Open loop

Question 7

What is the X CON and what does it do?

Answer 7

Cross connection valve. Connects the port side to starboard side to allow one strainer to be removed and cleaned/maintained while the system is still running.

Question 8

In an emergency (pump failure) what can be done and with whos permission?

Answer 8

Fresh water system can be cross connected to salt water with permission of the EMO

Question 9

What is supplied by the auz circ system?

Answer 9

Diesel plant/generators

Air conditioning plant