Auxilleries Flashcards
List 6 points to remember with flexible hoses
Hoses must be connected at both ends prior to charging
Must be whipped to prevent flailing
Screw connection must be clean
Must not be connected to moving structures
Must not be used for washing down
Hoses are lifted and dated
State the correct procedure for maintenance on HP air compressors
Isolate and tag-out all electrical supplies to the compressor
Isolate and tag-out air discharge valve and ringmain isolating valve
Drain compressor of all air pressure
Isolate and tag-out cooling water system
Drain compressor of all water
What should be checked when working on the HP air system
Two isolating valves in each supply are to be closed
Check that system down stream of isolating valves is charged
Continuously monitor system for build up of pressure
What is HP air used for
Starting machinery
Weapons operation
Life saving equipment
What are the working practices when (air systems) - air bottle charging
Bottle must be located in purpose built racks
Operator must be wearing correct
PPE ( goggles and ear defenders)
Hoses must be connected with the correct spanner and in good condition
A serviceable “o” ring must be used
Bottle should be charged slowly to avoid overheating
What systems are auxiliary
HPSW system
Cooling system
Environmental compliance
Bulge and sullage system
Sewage treatment
HP and LP air
What pressure does the high pressure salt water system run at
Runs at 7 bar maintained by a electric pump
Uses for the high pressure salt water system
Fire fighting hydrants/ sprays and centre fed hose reel
Pre wet system
Fitted bilge and salvage educators
Emergency cooling to main propulsion gas turbines/ diesel generators
Auxiliary machinery cooling water systems
Making fresh water
Flushing heads not 23 or 45 they use fresh water
HPSWM DC states
DC state 3
DC state 1
What happens at DC state 3
Main isolating valves are open, one pump is running which supplies the entire ring main
When is the pre wet system used
In nbc environment
What happens in DC state 1
All pumps are running ring main will be isolated using valves creating zones. One pump supplies it’s own zones then the zones that haven’t been affected by damage
What does ppm stand for
Parts per million
Machinery supplies from the cooling system
Main luv oil cooler (gearbox)
Controllable pitch propeller (CPP)
Gas turbine lib oil cooler
Plumber block heat exchanger ( each has its own heat exchanger)
What temperature do white metal bearings melt at
115 degrees
