09 stycznia 2006 Albercik
GAS TANKER - FAMILIARISATION LEVEL
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INTRODUCTION
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1. Pyt. How many degrees celsius is "absolute temperature" (absolyte zero)?
A Odp. - 273oC
2. Pyt. What is the absolute vapour pressure of water at 100oC?
A Odp. 1,0125 bar.
3. Pyt. What is the definition of liquefield gas according to IMOs gas code?
B Odp. Gases with vapour pressure higher than 2,8 bar with temperature of 37,8oC.
4. Pyt. What is the boiling temperature of propane at atmosphere pressure?
C Odp. - 43oC.
PROPETIES AND HAZARDS OF LIQUEFIED GAS
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1. Pyt. How many groups are liquefied gas divided into?
C Odp. 6 groups.
2. Pyt. What is the flammable limit for Ethylene?
D Odp. 2,5 - 34,0 % by volume.
3. Pyt. What is the main content of LNG?
C Odp. Methane.
4. Pyt. What is the maximum quantity of Chlorine that can be carried?
B Odp. 1,200m3.
CARGO CONTAINMENT SYSTEM
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1. Pyt. Are all independent tanks self-supported?
B Odp. All independent tanks are sel-supported.
2. Pyt. How many types of membrane tanks systems do we have?
A Odp. There is two types of membrane tank systems, membrane system and semimembrane
system.
3. Pyt. How many different types are independent tanks divided into?
C Odp. There are three types of independent tanks,type A, B and C.
4. Pyt. What is the difference between an independent tank type A and independent tank
type C?
D Odp. Independent tank type A need secondary barrier.
THE LIQUEFIELD GAS TANKER
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1. Pyt. What type of ships is normally used to carry LPG?
D Odp. On fully refrigerated ships at atmospheric pressure.
2. Pyt. The IMO codes divide gas carries into 4 categories, ship types IG, IIG, IIPG and IIIG.
What type of ships to be used for cargoes representing great hazard?
D Odp. Ship type IG.
3. Pyt. How is Ethylene gas normally carried?
A Odp. On fully refrigerated ships at atmospheric pressure.
4. Pyt. Are LNG carries normally fully pressurised?
D Odp. They are atmospheric pressurised.
CARGO EQUIPMENT AND INSTRUMENTATION
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1. Pyt. What type of valves are mostly utilised on cargo lines on gas tankers?
D Odp. Globe and butterfly valves are generally utilised on loading lines on gas carries.
2. Pyt. What is the purpose of running cargo pumps in parallel?
B. Odp. The increase the flow rate.
3. Pyt. What types of discharge pumps are normaly in use on gas carries?
B Odp. Centrifugal pumps are normally used.
4. Pyt. What is the cargo vapour normally condensed against in a cascade cooling plant?
D Odp. The cargo vapour is normally condensed against R22 in a cascade cooling plant.
TANK ENVIRONMENTAL CONTROL
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1. Pyt. Are we allowed to load ammonia on inert gas from combustion type generator?
B Odp. We are not allowed to load ammonia on inert gas that contains carbon dioxide CO2.
2. Pyt. Why is it necessary to cool down cargo tanks (refrigerated ships) during bulk loading?
D Odp. To avoid excessive tank pressure.
3. Pyt. What is the maximum allowed oxygen content in inert gas in acordance to IMO IGC
code?
D Odp. Maximum allowed oxygen content in the inert gas is 5 % by volume.
4. Pyt. Why cant we use inert gas containing nitrogen or cargon dioxide for gassing up?
B Odp. They are incondensible by ships equipment.
SAFETY PRECAUTIONS AND MEASURES
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1. Pyt. For what purpose do we have deck water spray on gas carries?
B Odp. All ships carrying flammable cargoes must have deck water spray to flush cargo spill
overboard and cool cargo area if fire.
2. Pyt. What do we mean with OPA-90 in shipping industry?
A Odp. With OPA-90 in shipping industry we mean the American Oil POllution Act of 1990.
3. Pyt. What is the main fire-fighting medium for tank deck on gas and chemical carries?
D Odp. Chemical powder is the main medium for tank deck fire fighting on gas chemical
carries.
4. Pyt. What is the minimum oxygen contet in tank atmosphere for checking flammable vapour
with a combustible gas indicator?
A Odp. 12 - 14% O2.
SHIP/SHORE INTERFACE
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1. Pyt. Where on boaed is smoking permitted in port?
C Odp. On designated smoking places.
2. Pyt. What is the purpose of the ship/shore safety check list?
D Odp. To ensure the safety of personel, ship and terminal.
3. Pyt. Where is ideal location for the gangway?
D Odp. Midway between cargo manifold and accomodation.
4. Pyt. Which of the conventions deals with safety and fire precautions?
A Odp. SOLAS.
EMERGENCY OPERATIONS
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1. Pyt. How do the human body absorb toxicants?
D Odp. The human body absorb toxicants through respiration, skin and the aliment channel.
2. Pyt. What is the number one job for the ship management team when fire break out?
B Odp. The ship management team must organise the fire squads and then the squads have
to rescue missing personal.
3. Pyt. In first aid we use a method called ABC, what is the meaning of ABC and when do we
use this method?
C Odp. The meaning of ABC is Air, Breath and Cirulation, and is used when stop in respiration
or heart failure.
4. Pyt. In first aid we use a method called ICE, what is the meaning of ICE and when do we
use this method?
A Odp. The meaning of ICE is Ice, Compress and Elevation, and is used to stop bleeding and
reduce pain.
ASSESSMENT
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30 pytan - powtorka wszystkich poprzednich !