While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.

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• During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.

  A . 150 millimeters of water pressure B . 125 millimeters of water pressure C . 100 millimeters of water pressure D . 75 millimeters of water pressure

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• In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.

  A . open and individual tank valves open B . open and the individual tank valves closed C . closed and the individual tank valves closed D . closed and the individual tank valves ope

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• A vessel engaged in replenishment or transferring persons，provisions or cargo while under way can be regarded as（）.

  A . a vessel restricted in her ability to maneuver B . a vessel engaged in laying，serving or picking up a navigation mark，submarine cable or pipeline C . a vessel not under command D . a power-driven vessel

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• Access to a cargo pumproom on a tank vessel carrying grades A，B，C or D liquid cargoes shall be（）.

  A . at least 13.1 feet away from the galleys，living quarters or navigation spaces B . from the open deck C . only from areas equipped with power ventilation systems D . isolated from any part of the vessel which normally contains sources of vapor ignitio

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• Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with（）.

  A . gooseneck vents and flame screens B . pressure-vacuum relief valves C . branch vent lines and a vent header D . forced draft blower

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• Protective clothing must be worn while sampling hazardous cargo on a tanker，and as a minimum includes（）.

  A . a hood or hard hat B . a face mask or goggles C . boots D . chemical resistant glove

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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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• In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.

  A . open and individual tank valves open B . open and the individual tank valves closed C . closed and the individual tank valves closed D . closed and the individual tank valves ope

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• Air compressors are NOT permitted in which space(s) on a tank barge carrying grade A cargo?（）

  A . A cargo handling room B . A space in which cargo hose is stored C . An enclosed space containing cargo piping D . All of the above

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• The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.

  A . secure all openings to the tank B . discharge an initial charge of CO with a hand portable extinguisher C . direct a fire hose into the tank and energize the fire main D . spray the tank boundaries with a fire hose to promote cooling

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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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• The sign used to caution persons approaching the gangway of a tank barge during cargo transfer reads（）.

  A . Warning，Keep Off，Stay Clear B . Danger，Do Not Board C . Warning，No Smoking，No Open Lights，No Visitors D . Dangerous Cargo Being Transferred

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• On a vessel carrying grades A，B，C or D cargoes，enclosed spaces where sources of vapor ignition are normally present shall NOT be segregated from cargo tanks by（）.

  A . cofferdams B . galleys C . pump rooms D . tanks used to carry liquids having a flash point of 150°F or above

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• A SYSTEM OF CLEANING THE TANKS BY WASHING THEM WITH THE CARGO OF CRUDE OIL WHILE IT IS BEING DISCHARGED is known as（）.

  A . COW B . LOT C . CBT D . coferdam

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• A bonding cable should be connected for cargo operations aboards a tank vessel as soon as the（）.

  A . cargo has been loaded or discharged B . cargo ghose is connected C . cargo pumps are started D . vessel is ready to handle cargo

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• Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be（）on board until the vessel’s Certificate of Inspection expires.

  A . consealed B . detained C . contained D . kept

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• Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be kept on board（）.

  A . for 1 year B . for 2 years C . until the next Coast Guard inspection D . until the vessel's Certificate of Inspection expire

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• While loading cargo，a white trimming light on the starboard side comes on. This indicates that（）.

  A . the vessel has a list of about 1` to starboard B . the chutes should be directed to the starboard side C . the chutes in No. 1 hold should be directed to the starboard side D . a severe list to starboard has developed and all loading should cease

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• Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.

  A . a subsequent temperature rise will cause the cargo to overflow B . air pockets may cause the cargo to bubble out of the ullage hole C . the increased viscosity of the product requires higher loading pressure which increases the chances of a spill D . the tank valve may be stiff and a spill will occur before the valve can be closed

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• What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）

  A . the Matitime Code of China B . Certificate of Inspection C . Oil Transfer Procedures Manual D . IOPP Certificate

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• The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a（）.

  A . crossover B . runaround C . come-along D . manifold

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• The internal volume of a cargo hold measured from the inside faces of the cargo battens，the lower side of the deck beams，and the top of the tank top ceiling is known as the（）.

  A . gross tonnage B . deadweight space C . bale cubic D . stowage area

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• Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.

  A . 5% or less B . 10% or less C . 15% or less D . 20% or le

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• The system of valves and cargo lines in the bottom piping network of a tanker that connects one section of cargo tanks to another section is called a（）.

  A . come-along B . crossover C . manifold D . runaround

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