Fuel systems 2

Question 1

how do we embark fuel at sea

Answer 1

Replenishment At Sea

Question 2

what is the purpose of the filling trunk?

Answer 2

to provide a filling point that will not discharge back up the filling point by using a weir system

Question 3

what are the purpose of displaced tanks and what level are they filled to?

Answer 3

as the fuel in the tank is used the tanks are filled with seawater for stability but never filled over 90%

Question 4

what is the purpose of the salt water gravity tank?

Answer 4

used to supply seawater to displaced tanks using gravity to create pressure.

Question 5

why do we need centrifuges?

Answer 5

to separate seawater and dirt from the fuel using centrifugal force also know as polishing the fuel. once polished we send it to the un-displaced tanks.

Question 6

what is the max fill level of un-displaced tanks?

Answer 6

95%

Question 7

what speed does a centrifuge spin at?

Answer 7

5000rpm

Question 8

why does each tank have a isolation valve?

Answer 8

so we can shut of tanks when they are filled to the desired level.

Question 9

name 4 ways to embark fuel along side?

Answer 9

road tanker
direct jetty pipeline
jetty storage tanks
fuel barge

Question 10

what is the name of the supply valve on the fuel boost system?

Answer 10

remotely operated suction valve

Question 11

what is the value of the pre filters?

Answer 11

5 microns

Question 12

what does the coalescer do and down to what value?

Answer 12

remove water droplet down to 10ppM

Question 13

what 3 are auxiliary machines in the fuel system?

Answer 13

ready use tank
emergency run down valve
auxiliary boilers, generator and gas turbine

Question 14

how are ready use tanks toped up?

Answer 14

by a float switch

Question 15

what are contaminants of fuel?

Answer 15

water (encourage MBG)
dirt
surfactants

Question 16

what does MBG stand for?

Answer 16

micro biological growth

Question 17

what are the 4 fuel tests

Answer 17

visual test
water reaction test
diesel fuel filtration kit
colour test

Question 18

how do you preform a visual test?

Answer 18

look at the fuel it should be clear and bright

Question 19

how do you preform a water test?

Answer 19

take a test tube with 20ml of distilled water add 80ml of your fuel the cloudy interface between them must be 2ml or less.

Question 20

how do you preform a colour test?

Answer 20

compare you fuel with other samples visually

Question 21

how do you preform a Diesel Fuel Filtration test?

Answer 21

take a 250ml sample place it in the test kit must not reach 15psi before the sample is passed through.

Question 22

what are the hazards of handling fuels?

Answer 22

fire and explosion
toxicity
dermatitis
pollution