Cargo pump relief valves are piped to the（）.

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• When start a screw pump, the by pass valve should be （）.

  A . closed B . opened fully C . cracked open D . partly ope

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• A common trouble with the fuel pump plungers or fuel valve spindle is （）.

  A . broken down B . stuck C . oil leakage D . carbonized

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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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• 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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• Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?（） (1) Its discharge is continuous (2) It has no internal valves (3) Upon accidental closing of discharge valve, excessive pressure will not build up

  A . （1），（2） B . （2），（3） C . （1），（2），（3） D . （2）only

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• When starting a reciprocating pump, the inlet valve should be （）.

  A . closed B . opened fully C . cracked open D . partly ope

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• A relief valve for a cargo pump is generally installed（）.

  A . after the discharge valve B . between the pump and discharge valve C . after the suction valve D . between the pump and suction valve

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• In a full flow type lube oil system, the bypass relief valve will lift due to （）

  A . a clogged filter element B . excessive lube oil pump discharge pressure C . excessive lube oil flow D . excessively hot lube oil

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• If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.

  A . a low load on the unit B . a clogged pump suction strainer C . a blockage in the line between the pump and hydraulic motor D . the hydraulic motor turning too fast

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• What is a characteristic of all centrifugal cargo pumps? （）

  A . They are self-priming B . Decreasing the speed of rotation will decrease the discharge pressure C . Opening the discharge valve wider will increase the discharge pressure D . All of the above

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• Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

  A . Oil is discharged from the impeller through the outlet B . Gravity causes the oil to flow toward the discharge C . The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts D . The discharge capacity varies directly with the speed of the impeller

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• If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）

  A . excessively late injection timing for each cylinder B . incorrectly adjusted intake valve timing C . incorrectly adjusted fuel injector D . incorrectly adjusted intake valve clearance

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• What is the purpose of pressure-vacuum relief valves? （）

  A . Regulation of discharge pressure from cargo pumps B . Maintaining constant velocity in cargo lines C . Regulation of suction head on cargo pumps D . To maintain a tank or void at atmospheric pressure

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• In （） pumps a closed discharge valve will cause bursting discharge pressure.

  A . centrifugal B . plunger C . injector D . water

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• A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a（）.

  A . flame stopper B . flame screen C . flame filter D . flame restrictor

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• When starting a centrifugal pump, the discharge valve should be （）.

  A . closed B . opened fully C . cracked open D . partly ope

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• A common trouble with the fuel pump plunger or fuel valve spindle is （）.

  A . water leakage B . steam leakage C . oil leakage D . air leakage

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• If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）

  A . liquid in the cylinder B . low compression in the cylinder C . high exhaust temperature D . poor fuel penetratio

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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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• When loading bulk liquid cargo，what is the FIRST action you should take if a cargo valve jammed open?（）

  A . Trip the pump relief valve B . Order the dock man to shut down C . Call the owner，operator，or terminal supervisor D . Run out the vessel's or terminal's fire hose

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• The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.

  A . assist in a quick cutoff of fuel injection B . allow oil backflow from the injector to the helix C . reduce fuel oil pressure between injection strokes D . meter the quantity of fuel delivered

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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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• Cargo-handling machinery includes （).A.mooring winchesB.windlassC.cargo oil pumps

  Cargo-handling machinery includes (). A.mooring winches B.windlass C.cargo oil pumps

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• When the relief valve is used as a constant pressure valve, it is connected to the outlet of the hydraulic pump to ensure that the outlet pressure of the hydraulic system (pump) is constant.

  A:正确; B:错误

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