Seagull AS

Specialized Training for Oil Tankers

Task 3

Task 3.

Name:

ID no:

This task no. 3 must be mailed or sent by fax to Seagull A/S. Put your answers in the envelope marked “Task 3” and mail it.

Question 3.1.

Explain the purpose of the drop lines.

Answer:

Question 3.2.

Mention some of the advantages of using butterfly valves in the cargo system.

Answer:

Question 3.3.

Mention the most commonly used valves on tankers.

Answer:

Question 3.4.

What is the normal size of the “elephant foot”?

Answer:

Question 3.5.

Are non-SBT tankers permitted to discharge ballast water below the water line?

Answer:

Question 3.6.

What is the hydrocarbon biodegradation depends on?

Answer:

Question 3.7.

What is the main purpose of an expansion coupling?

Answer:

Question 3.8.

Describe the cargo heating procedure on vessels equipped with deck mounted cargo heaters.

Answer:

Question 3.9.

With regard to cargo heating what is the recommended carrying temperature on waxy crude with pour points over 100^o F?

Answer:

Question 3.10.

What is the requirement to capacity of venting system during loading?

Answer:

Question 3.11.

What is the minimum requirement to the capacity of mechanical ventilation in the pump room?

Answer:

Question 3.12.

How many km² can 1 ton of oil spilled at sea cover?

Answer:

Question 3.13.

What are the requirements to location of engine room on ships constructed after 1 February 1992?

Answer:

Question 3.14.

What is the minimum height of tank vent outlets (P/V valve) above weather deck or raised walkway?

Answer:

Question 3.15.

Where do we find regulations regarding cargo tank venting arrangements?

Answer:

Question 3.16.

Explain tank-venting control.

Answer:

Question 3.17.

Explain VEF (vessel experience factor)?

Answer:

Question 3.18.

What will be the VEF if “Shore fig.” = 2,768.53 mt. And the “ship fig.” = 2,798.86 mt.?

Answer:

Question 3.19.

What is the definition of N.S.V (net standard temperature)?

Answer:

Question 3.20.

Do the presence of inert gas prevent evaporation and loss of cargo?

Answer:

Question 3.21.

Why should naphtha based condensate never be shipped on unclean tanks containing crude oil ROB?

Answer:

Question 3.22.

How to determine the density of the slop after tank washing?

Answer:

Question 3.23.

What will govern the behaviour of the crude oil during the voyage?

Answer:

Question 3.24.

If the loading order is given in metric tonnes and cubic meters what will normally be the standard temperature?

Answer:

Question 3.25.

Draw a sketch of an efficient slop tank arrangement.

Answer:

Question 3.26.

Describe how to decant the slop tank after tank cleaning.

Answer:

Question 3.27.

Explain the difference of ventilate cargo tanks by dilution or by displacement.

Answer:

Question 3.28.

Explain the difference of purging and ventilation.

Answer:

Question 3.29.

What is the most desirable washing pressure for washing crude oil tanks?

Answer:

Question 3.30.

What are the reasons for taking cargo samples from the bottom of the tanks?

Answer:

Practical task:

If you are on board a vessel this practical task must be done and mailed/sent to Seagull AS.

Make a sketch of the vacuum-stripping system and explain it's working principles.

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Author:	Kjell Vagtberg	Printed:	06.01.03
File name:	Task 3.doc	Version:
File created:	14.02.02	Approved by:
Last saved:	06.01.03	Approved date:

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