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Crew Evaluation Test online for seamans about Liquid Cargo Properties

“Seagull CES test online for seafarers about Liquid Cargo Properties” (Crew Evaluation Test) will help marine specialists in preparation to exams for getting certificate of confidence.

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Practice - CES test: cargo properties
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Exam - CES test: cargo properties
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A liquid at different temperatures is made to flow through identical orifice passages. The one with the easiest flow will have liquid at:
The lowest temperature.
The highest temperature.
The average temperature.
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During a cargo voyage, the inert gas pressure in the tank will decrease as a result of:
Increasing viscosity level during the voyage.
Leaks, which always are present due to the pipeline system, gauges etc.
Inert gas being absorbed by the liquid (diffusion).
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Hydrocarbons belongs to a chemical group named:
Carbohydrates.
Alkanes.
Organic Substances.
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Light products are more volatile than heavier products. This means, that light products:
Have higher viscosity.
Have higher flash point.
Have lower viscosity.
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On a fully refrigerated ship, gas would be transported:
In insulated pressure tanks to keep the gas cold.
In high viscosity tank domes.
Close to its atmospheric boiling point.
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The O2 meter shows an oxygen level of 18,3 % in a tank, that you are to inspect. This means, that:
You cannot enter the tank, because the body requires air with the content of 21 % oxygen for normal breathing.
You can enter the tank safely, because the body only requires air with the content of 17,8 % oxygen.
You cannot enter the tank, because the body requires air with the content of 22,8 % oxygen for normal breathing.
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The flammable range in air of ethylene is 3 % – 32 %. This means, that:
Ethylene vapour is flammable when there is 3 % – 32 % oxygen present in the mixture.
Ethylene vapour is proportion 3 % – 32 % to air, is flammable.
Ethylene vapour is flammable when there is 3 % – 32 % air present in the mixture.
Next question
The gases present in crude oil are termed:
Natural Gas Liquids (NGL).
Liquefied Petroleum Gas (LPG).
Inert Gas.
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The molecular structure below is named:

Molecular structure

Cyclohexane.
Benzene.
Carbohydrate.
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Threshold Limit Value is:
A measure of the weight of a substance (kg/dm3).
A measure of the toxicity level in the atmosphere.
The maximal partial pressure (%).
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What information should always be to find on the datasheet of a substance?
The price and quality of the product.
Information regarding safe handling of the product.
Production date and level of flammability.
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* In some questions may be more, than one right answer.
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Март, 29, 2022 1999 0
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