hpsw and cooling Flashcards
what are hpsw systems used for (7)
fire fighting
pre wet
bilge and salvage eductors
emergency cooling to propulsion
auxiliary machinery cooling
making fresh water
flushing heads
where does the hpsw ring main run round (1)
2 deck (can be sub devided through isolation valves and can be moved up decks with risers)
what operations require more pumps than just 1
(1)
special operations such as flying operations
what is a riser (1)
vertical pipe that raises salt water to 5 deck
what is a pump leak off and what pressure does it work(2)
prevents over pressurisation
works at 10% of the 7 bar
where are sprays used (5)
magazines
paint lockers
inflam stores
funnells
galley
what is dc state 1
(4)
possibility of damage
all pumps running
valves shut
ringmain isolated into zones
what is dc state 3(3)
during normal operations
1 pump running rest on standby
all valves open
what temperature does white metal melt at(1)
115 degrees
what is the main propulsion circulation syetem (4)
gas turbines
plumber block emergency cooling
main forced loob system cooling
cpp cooling if fitted
what is the auxiliary circulation system and what can you do with it (3)
acp (air conditioning plant)
deisel engines
can cross connect with opposite side of ship
what type of system is a fresh water(1)
closed
what type of system is a salt water system(1)
open
why do we use fresh water to cool deisel engines and not salt water(2)
to stop corrosion and contamination
who’s permission do i need to cross connect hpsw to fresh water(1)
meo
if one of the sea suction valves breaks on the auxiliary cooling system what do you do (2)
isolate it and cross connect it with other side of ship
