Oily Water Separators / Oil Record Book

Question 1

What statement is true concerning the effect of elevating the temperature of the oily- water mixture associated with an oily-water separator?
Heating the oily-water mixture [increases / decreases] the viscosity of the oil and [increases / decreases] the specific gravity differential between the oil and water.

Answer 1

Heating the oily-water mixture decreases the viscosity of the oil and increases the specific gravity differential between the oil and water.

Question 2

What is an engine room bilge oily-water separator designed to do?

Answer 2

Remove small amounts of oil from large amounts of water.

Question 3

What statement is true concerning the polishing coalescer filter of an oily-water separator?
The coalescing filter is typically an [hydrophilic / oleophilic] filter meaning that small droplets of entrained [water / oil] of the oily-water mixture coalesce on the filter and form large globules of [water / oil] that [rise to the top / sink to the bottom] of the filter housing.

Answer 3

The coalescing filter is typically an OLEOPHILIC filter meaning that small droplets of entrained OIL of the oily-water mixture coalesce on the filter and form large globules of oil that RISE to the top of the filter housing.

Question 4

Referring to the illustration, note that the solenoid in line “C” is closed. The check valve in line “E” is open. The separator service pump is running. The check valve in line “G” is closed. Valve “B” is closed. Valve “D” is open. What is the operational status of the oily-water separator unit? GS-0175

Answer 4

The oily-water separator is in the bilge water separation processing mode with water discharging back to the bilge water holding tank with an oil content greater than 15 ppm.

Question 5

Under what conditions is it permissible to pump machinery space bilges directly overboard without processing by an oily water separator?

Answer 5

When presented with a flooding emergency.

Question 6

Referring to the illustration, what would be the result if the lower oil/water interface detection probe became faulty? GS-0175

Answer 6

The unit would not be able to transition from ending the separation processing mode to initiating the oil discharge mode.

Question 7

If item “1” in the illustrated oily water separator indicates an abnormally deep vacuum, which of the following conditions is the most probable cause? Illustration GS-0153

Answer 7

Suction line inlet strainer is obstructed.

Question 8

In order to facilitate separation of oil from an oily water mixture in an oily water separator, what statement is true concerning the flow pattern of the oily water?
Ideally the flow of the oily water should be [high/low] in flow rate and [high/low] in turbulence.

Answer 8

Ideally the flow of the oily water should be low in flow rate and low in turbulence.

Question 9

What type of oil as part of an oily-water mixture is most likely to require heating to facilitate separation in an oily-water separator?

Answer 9

Heavy residual fuel oil.

Question 10

A new ocean going ship of 2000 gross tons having an inoperative oily water separator may dispose of its bilge slops by __________.

Answer 10

holding its slops on board until they can be discharged to a shore side reception facility

Question 11

Bilges may be pumped __________.

Answer 11

overboard through an oily-water separator

Question 12

On U.S. inspected ships, oily water separating equipment, bilge alarms, and bilge monitors must be approved under __________.

Answer 12

46 CFR 162

Question 13

If an oily-water separator uses an inclined plate pack to facilitate separation, what statement concerning the plate pack is true?

Answer 13

The oil droplets collect on the underside of the plates and rise when they have reached the outer edge of the plate pack. Solid particles collect on the upper side of the plates and sink when they have reached the inner edge of the plate pack.

Question 14

In accordance with international MARPOL Annex I regulations and federal regulations under 33CFR Subchapter O, for vessels of 400 gross tons and above which are all required to carry an oily-water separator to process bilge slops, what is the design criteria in terms of maximum oil content of the overboard discharge?

Answer 14

15 parts per million

Question 15

in what part of 33CFR can be found the recordkeeping requirements for specific machinery space operations onboard all ships of 400 gross tons or above other than a tanker that must be entered into an Oil Record Book?

Answer 15

33CFR Part 151.25

Question 16

In accordance with the international MARPOL Annex I regulations and the federal regulations in 33CFR Subchapter O, specific machinery space operations onboard all ships of 400 gross tons or above other than a tanker must be documented in an Oil Record Book. This includes disposal of oil residues and overboard discharge of bilge water that has accumulated in machinery spaces, as well as other operations. Who is responsible for signing the Oil Record Book entry for the specific operation?

Answer 16

the master of the vessel

Question 17

In accordance with the international MARPOL Annex I regulations and the federal regulations in 33CFR Subchapter O, specific machinery space operations onboard all ships of 400 gross tons or above other than a tanker must be documented in an Oil Record Book. Which of the listed machinery space operations must be documented in the Oil Record Book?

Answer 17

Discharge of waste oil or sludge to a reception facility.

Question 18

You are the Chief Engineer onboard a general cargo vessel in excess of 1600 gross tons. To remain in compliance with the 33 CFR oil record book requirements for non-tank vessel machinery space operations, which of the following operations requires an entry to be made in the Oil Record Book?

Answer 18

Discharge overboard of bilge water which has accumulated in machinery spaces.

Question 19

During fueling operations oil is detected in the water adjacent to your vessel. If however, it is determined to be from some source other than your vessel, you should __________.

Answer 19

notify the Coast Guard