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

1 / 25

What is the main quencher for an oil tanker?

Water.

Foam.

Carbonic acid.

Powder.

2 / 25

What types of deck seal units are there?

The open and the closed type.

The circular and the square type.

The dry and the wet type.

The single and the combined type.

3 / 25

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

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

The inert gas system should be in operation

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

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

4 / 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

5 / 25

A swing check valve is used in a pipeline to _____

Allow flow in one direction only

Maintain a preset pressure on the line

Relieve excessive pressure on the line

Closely regulate the amount of flow

6 / 25

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

A rising stem gate valve

A check valve

A butterfly valve

A globe stop valve

7 / 25

The handle of a butterfly valve must be _____

Parallel to the axis of flow when the valve is closed

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

Parallel to the flow when in the fully open position

Either at 0°

8 / 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

9 / 25

Compared to globe and angle valves, gate valves _____

Operate with little or no pressure drop when fully opened

Are more easily repaired

Cannot be used for service requiring infrequent operation

Are more suitable for throttling

10 / 25

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

Cracked open

Half open

Fully closed

Fully open

11 / 25

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

Water spray plant.

Powder plant.

Foam plant.

CO2 plant.

12 / 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 and slop tank

Every cargo tank

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

Every cargo tank, slop tank and cofferdam

13 / 25

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

Heavy fluid in the flow stream

Rough casing of volute surfaces

Vapour pockets formed in the suction flow stream

Worn wearing rings

14 / 25

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

A gate valve

Any check valve

A globe valve

Any needle valve

15 / 25

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

Diffuser

Injector

Siphon

Compressor

16 / 25

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

Reprime the pump.

Close the discharge.

Vent the casing.

Tighten the packing.

17 / 25

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

Ballast Monitor. (BM)

Ballast Supervising Monitor. (BSM)

Oil Detection Monitoring Equipment. (ODME)

Ballast Handling Monitor. (BHM)

18 / 25

Clean ballast is normally _____

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

Ballast water loaded directly into a cargo tank after discharge

19 / 25

Loading through the pump room is _____

To be avoided

Permissible

Done to increase the loading rate

Normally the approved way to load slop tanks

20 / 25

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

Globe valves.

Non-return valves.

Butterfly valves

Gate valves.

21 / 25

Inert gas is produced on board of ships by _____

Any of these

An Inert Gas Generator

The auxiliary boilers

The main boilers

22 / 25

In the vicinity of an electrical storm tank cleaning _____

May continue providing the tank venting system is isolated

May continue if the tank pressure remains at atmospheric

May continue providing the tanks are inerted

Must be stopped

23 / 25

Clean ballast may be discharged _____

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

Only by gravity

By pumping directly through any overboard discharge line

By pumping through the bottom sea chest

24 / 25

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

Height of liquid in the tank

Height from bottom shell to top stringers in the tank

Height from liquid surface to top stringers in the tank

Height of bottom girders in the tank

25 / 25

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

Port and starboard slop tank.

Primary and secondary slop tank.

Two last tanks to load.

Slop tank 1 and slop tank 2.

Your score is

Educate Empower Excel

Terms and Conditions

Contact Us

Privacy Policy

💙 Support Free Maritime Education 💙