Basic Training For Oil And Chemical Tanker Cargo Operations (OCTCO)

1 / 25

On tank vessels, which of these valve types is most commonly used in conjunction with hydraulically actuated controls?

Non-return valves.

Butterfly valves

Gate valves.

Globe valves.

2 / 25

When loading by gravity, the last valve to be opened should be _____

The ship's drop line valve

The ship's manifold valve

For the cargo tank to be loaded into

The shore tank valve

3 / 25

What is the name of the device used for supervising all the ballast water to be pumped overboard?

Ballast Supervising Monitor. (BSM)

Oil Detection Monitoring Equipment. (ODME)

Ballast Monitor. (BM)

Ballast Handling Monitor. (BHM)

4 / 25

Steam heating coils are provided in some cargo tanks in order to _____

Provide warm water when tank cleaning

Heat cargoes which have a high pour point

Increase the volume of the cargo within the tank

Reduce the volume of the cargo within the tank

5 / 25

Which of these valves will be cycled from fully open to fully closed when the handle is turned 90° ?

A butterfly valve

A globe stop valve

A check valve

A rising stem gate valve

6 / 25

When starting a positive displacement pump, the discharge valve must be _____

Fully closed

Half open

Cracked open

Fully open

7 / 25

When there are two slop tanks on board, what are the correct names of these slop tanks?

Port and starboard slop tank.

Slop tank 1 and slop tank 2.

Two last tanks to load.

Primary and secondary slop tank.

8 / 25

A swing check valve is used in a pipeline to _____

Allow flow in one direction only

Relieve excessive pressure on the line

Closely regulate the amount of flow

Maintain a preset pressure on the line

9 / 25

What kind of fixed extinguishing plant is installed to use on an oil tanker?

CO2 plant.

Powder plant.

Water spray plant.

Foam plant.

10 / 25

On tankers, the crude oil washing check list states (amongst other things) that during crude oil washing operations _____

The inert gas pressure is to be recorded prior to starting washing

The inert gas system should be in operation

The inert gas oxygen content must be below 4.5 % in order to start or continue washing

The quality of the inert gas must be frequently checked and recorded.

11 / 25

What is the main quencher for an oil tanker?

Powder.

Water.

Foam.

Carbonic acid.

12 / 25

What types of deck seal units are there?

The dry and the wet type.

The circular and the square type.

The single and the combined type.

The open and the closed type.

13 / 25

Compared to globe and angle valves, gate valves _____

Cannot be used for service requiring infrequent operation

Are more suitable for throttling

Are more easily repaired

Operate with little or no pressure drop when fully opened

14 / 25

In the vicinity of an electrical storm tank cleaning _____

May continue providing the tanks are inerted

May continue if the tank pressure remains at atmospheric

Must be stopped

May continue providing the tank venting system is isolated

15 / 25

One of the requirements for crude oil washing on tankers is that an inert gas system be fitted. According to regulations an inert gas system is required for which spaces?

Every cargo tank

Every cargo tank, slop tank, cofferdam and ramp space.

Every cargo tank, slop tank and cofferdam

Every cargo tank and slop tank

16 / 25

Clean ballast may be discharged _____

By pumping through the bottom sea chest

By pumping only through a discharge line which is connected to an operational oil content monitor

By pumping directly through any overboard discharge line

Only by gravity

17 / 25

The three basic parts of any eductor are the nozzle, the suction chamber and the _____

Compressor

Diffuser

Injector

Siphon

18 / 25

Which of the valves listed should be used either in the fully opened or the fully closed position?

Any check valve

Any needle valve

A gate valve

A globe valve

19 / 25

Inert gas is produced on board of ships by _____

The main boilers

The auxiliary boilers

An Inert Gas Generator

Any of these

20 / 25

Clean ballast is normally _____

Ballast water loaded directly into a cargo tank after discharge

Ballast water loaded in tanks used only for that purpose.

Ballast water loaded into cargo tanks which have been crude oil washed

Ballast water loaded into cargo tanks which have been crude oil and water washed

21 / 25

Which of these conditions can lead to cavitation in a centrifugal pump?

Vapour pockets formed in the suction flow stream

Heavy fluid in the flow stream

Rough casing of volute surfaces

Worn wearing rings

22 / 25

The purpose of remotely controlled measuring of tank levels are to measure:

Height from bottom shell to top stringers in the tank

Height of bottom girders in the tank

Height from liquid surface to top stringers in the tank

Height of liquid in the tank

23 / 25

The handle of a butterfly valve must be _____

Forty-five degrees to the axis of flow when the valve is fully open

Either at 0°

Parallel to the flow when in the fully open position

Parallel to the axis of flow when the valve is closed

24 / 25

If a centrifugal pump operating with a positive suction head becomes air bound, your FIRST response should be to _____

Close the discharge.

Reprime the pump.

Tighten the packing.

Vent the casing.

25 / 25

Loading through the pump room is _____

Done to increase the loading rate

Normally the approved way to load slop tanks

To be avoided

Permissible

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