Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.

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  A . manufacturer B . CCS C . HAS D . shipper

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• A “dangerous cargo manifest” is needed for you to carry a combustible cargo. You should obtain the shipping papers to make this “manifest” from the（）.

  A . manufacturer B . ABS C . Coast Guard D . shipper

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• Which method is used to supply inert gas from a flue gas system to the cargo tanks?（）

  A . Exhaust gas pressure from the stack B . High capacity fan C . Inert gas compressor D . Natural aspiratio

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• A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.

  A . purifies B . combinations C . concentrations D . filter

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• You have berthed in a area with other tank vessels. What signal is displayed by a vessel to indicate it is transferring flammable or combustible liquid cargo?（）.

  A . A flashing yellow light B . A red light visible all around the horizon C . A green light visible all around the horizon D . An illuminated red and yellow caution flag

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• Combustible gas indicators operate by drawing an air sample into the instrument（）.

  A . over an electrically heated platinum filament B . where it is mixed with nitrogen C . where it is ignited by a sparking device D . where its specific gravity is measured

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• Fires involving combustible metals are classified as （）.

  A . class "A" fires B . class "B" fires C . class "C" fires D . class "D" fire

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• A dangerous cargo manifest is needed for you to carry a combustible cargo. You should obtain the shipping papers to make this manifest from the（）.

  A . manufacturer B . CCS C . MSA D . shipper

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• Before entering a tank，always check the vapor content（）a combustible gas indicator.

  A . with B . by C . of D . for

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• A liquid sight flow indicator in a refrigeration system is examined and gas bubbles are noted in motion with the fluid flowThis means （）.

  A . the system is fully charged B . there is air leaking in from the condenser C . ice crystals are forming in the refrigerant D . the system contains less than a full charge of refrigerant

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• Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.

  A . class A B . class B C . class C D . class D

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• An extinguishing agent which effectively cools，dilutes combustible vapors，removes oxygen，and provides a heat and smoke screen is（）.

  A . carbon dioxide B . Halon 1301 C . dry chemical D . water fog

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• Hot gas defrosting uses the hot gas from （） to defrost the evaporator.

  A . starting air bottles B . diesel engines C . boilers D . refrigeration compressor

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• The component in an inert gas system used for cleaning the gas of solid and sulphur combustion products，while simultaneously cooling the inert gas，is called the（）.

  A . filter B . cooler C . scrubber D . purifier

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• After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?（）

  A . Scrubber B . Demister C . Deck water seal D . Final filter

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• A combustible gas indicator meter is calibrated to read the percentage of（）.

  A . vapor to oxygen B . the flammable limit concentration C . the autoignition concentration D . the lower explosive limit concentretio

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• If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.

  A . too much refrigerant in the system B . oil entrained in the refrigerant C . less than a full charge of refrigerant in the system D . ice crystals forming in the refrigerant

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• A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? （）

  A . In the lower level of the pumproom B . In the middle level of the pumproom C . In the upper level of the pumproom D . On the deck outside the pumproom

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• A combustible gas indicator is used to determine （）.

  A . if there is sufficient oxygen to support life B . the toxicity of flammable gases or vapors C . the amount of CO present in flue gas D . the presence of flammable gases or vapors in the air

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  A.精细加工策略 B.组织策略 C.复述策略 D.计划组织策略

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• It is said that the gas company will raise the gas fare _____ 4%.

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