Before welding in a tank that has carried petroleum products，the tank must be certified by （）.

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

  A . enter the tank safely B . suspect the accuracy of the reading C . ventilate the tank D . test for nitroge

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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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• The oil was pumped up in the settle tank such a height that it （）.

  A . spilled B . overflowed C . sprayed D . injected

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• If there were a fire in the bunker tanks, you would（）

  A . close the vent B . pump out the tank C . activate the fixed CO system D . cut off the heating coil

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• Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.

  A . the Customs B . the Register Bureau of Shipping C . the Shipyard Fire Department D . a certified gas chemist

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• The sequence of parts in a generally used fuel oil supply system for a main engine is （） (1)tanks in the double bottom (2)centrifuges (3)service tank (4)settling tank (5)viscosity regulator

  A . (1)-(2)-(4)-(3)-(5) B . (1)-(4)-(2)-(3)-(5) C . (1)-(3)-(2)-(4)-(5) D . (1)-(5)-(4)-(2)-(3)

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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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• Movement of liquid in a tank when a vessel inclines causes an increase in（）.

  A . righting arm B . metacentric height C . height of the uncorrected KG D . natural rolling period

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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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• In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.

  A . secure all sources of fresh air to the tank B . begin transferring the fuel to other tanks C . top off the tank to force out all vapors D . station someone at the fixed CO release control

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• What is the best instrument for establishing a safe working area before welding in a confined space? （）

  A . An oxygen indicator B . A combustible gas indicator C . A combination combustible gas and oxygen indicator D . A flame safety lam

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• What is the principal danger from the liquid in a half full tank onboard a vessel?（）

  A . Corrosion from the shifting liquid B . Rupturing of bulkheads from the shifting liquid C . Loss of stability from free surface effect D . Holing of the tank bottom from the weight of the shifting liquid

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• Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.

  A . Orsat apparatus B . flame safety lamp C . Halide torch D . combustible gas indicator

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• In the case of new crude oil tankers，the additional ballast permitted shall be carried in cargo tanks only if such tanks have been（）before departure from an oil unloading port or terminal.

  A . inerted B . crude oil washed C . diluted D . cleaned

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• Prior to burning or welding on a fuel tank on a ship，regulations require that an inspection be made. An entry in the unofficial logbook is required if this inspection is made by（）.

  A . a marine chemist B . the Officer in Charge，Marine Inspection C . the Master or person in charge of the ship D . the National Fire Protection Associatio

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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 partially full tank causes a virtual rise in the height of the（）.

  A . metacenter B . center of buoyancy C . center of flotation D . center of gravity

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• When checking the liquid level in a tank, you should position yourself （）.

  A . on the windward side of the opening B . on the leeward side of the opening C . at a right angle to the wind direction D . so that the obstruction of your body will protect you from the fume

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• If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）

  A . gas freed B . inerted C . filled with water D . all of the above as necessary

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• This is what you should bear in mind： Don‘t ________ a salary increase before you actually get it.

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• The free surface effects of a partially-full tank in a floating ship increase with the （).

  The free surface effects of a partially-full tank in a floating ship increase with the (). A.surface area of the fluid in the tank B.displacement volume of the ship C.draft of the ship D.height of the tank above the keel

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• This is what you should bear in mind: Don’t（）a salary increase before you actually get it.

  A．hang on B．draw on C．wait on D．count on

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• 听力原文：Before going to the gas station to have his tank filled, Wright posted his letter and then went to buy a kilo of meat at the supermarket near the cinema．

  Which place has Wright NOT been to？ A．The gas station. B．The post office. C．The supermarket. D．The cinema.

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• In this game you are in a tank and the screen shows your view of the landscape outside. You gain points by shooting enemy tanks, supertanks, missiles and saucers.

  Experts gain scores of around 150,000 points at this game. To get a high score you have to destroy twenty tanks as quickly as possible. After this the supertanks, missiles and saucers appear. These are worth far more points than the ordinary tanks.(The number of tanks you have to destroy before the supertanks appear varies on different machines.) Try to approach an enemy tank from the side or the back, so it cannot shoot at you. Then, when you get close, turn to face it, line it up in your sights and fire before it turns to shoot at you. If you miss or are too slow, quickly escape by moving out of the enemy's line of fire. You can then move around the enemy and came in from another side. When a supertank appears, try to destroy it. Then wait safely behind an obstacle for a missile or flying saucer. The cubes are useful objects to hide behind as you can fire over them without exposing yourself to danger. The missiles will fly straight at you, but they are difficult to hit, so do not shoot at them until they are quite close. The saucers are much easier to hit, but do not chase them as you will be open to attack from enemy tanks. This information refers to ______. A．au underwater game B．a computer game C．a board game D．a ball game

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