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（）.

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• When ordering a new IBM Power Systems server, a customer is given the option of two types of Hardware Management Console:7042-CR4 and 7042-C06. Which main difference between the options would influence the customer's decision?（）

  A . The 7042-CR4 is a rack mounted model, compared to the 7042-C06, which is adesktop. B . The 7042-CR4 is limited to 16 managed systems, compared to a limit of 32 for the 7042-C06. C . The 7042-C06 has faster CPUs and twice the RAM compared to the 7042-CR4,which is suited to large enterprise deployments. D . The 7042-C06 can manage POWER5-based hardware, in addition to POWER6, while the 7042-CR4 can only manage POWER6-based hardware.

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• The purpose of the purge valve at the top of the condenser in a refrigerating system is to（）

  A . remove any air that may accumulate in the system B . take out unpleasant fumes from the refrigerant C . vent off excess refrigerant in an emergency D . permit opening the refrigerating system for cleaning and inspecting

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• In WebLogic 10.3.6 and 12c, transaction logs can optionally write to a JDBC store instead of a file store on the file system. Identify the three benefits as a result of this capability.（） 

  A . simplified disaster recovery architecture and efforts B . better performance than writing logs to a file store C . common storage of transaction logs with application data D . common replication of transaction logs with application data E . higher transaction throughput

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• The globe valve has a bulbous body, housing a valve seat and screw down plug or disc arranged at right angles to the axis of the pipeAccording to the above sentence, which of the following statements is not true?（）

  A . The profile of the valve is like a globe B . The valve seat is set into the bulbous body C . The plug or disc of the valve is made vertical to the axis of the pipe D . The valve seat is located at right side of the plug or disc

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• As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into （）.

  A . liquid B . oily mixture C . emulsion D . vapor

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• If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）

  A . a low level in the engine expansion tank B . excessively high coolant pressure C . improper temperatures D . malfunctioning of the jacket water heater

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• Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.

  A . cylinder liners and piston rings B . main bearings C . crankpin bearings D . turboblower

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• Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in （） position.

  A . neutral B . end C . opening D . closure

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• Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）

  A . Pressure-reducing valve B . Unloading valve C . Counterbalance valve D . Pressure-relief valve

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• A branch line valve of a fire extinguishing system on a ship must be marked with the（）.

  A . maximum pressure allowed at that branch B . name of the space or spaces which it serves C . date of the last maintenance inspection D . pressure needed to maintain an effective stream at that point

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• Operation of the valve control release on a fixed CO2 system must immediately（）.

  A . release CO to the protected space B . secure all mechanical ventilation in the protected space C . sound the rig's general alarm signal for a fire D . sound an alarm in the ballast control room

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• Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?（）

  A . the direct acting relief valve is used for controlling lower flows and pressure B . the pilot operated relief valve is used for controlling higher flows and pressure C . the pilot operated relief valve is used for controlling lower flows and pressure D . the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve

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• The system will include various （） such as low tank level alarms and remote operation of tank outlet valves in the events of a fire.

  A . Switches B . panels C . alarm units D . safety device

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• Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and individual pump for each cylinder?（）

  A . Common-rail injection B . Air injection C . Jerk pump injection D . Distribution injectio

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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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• Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to （）.

  A . react with insufficient speed droop B . fail to react to small speed changes C . have excessive sensitivity to small speed changes D . remain in the neutral positio

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• In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.

  A . Globe valve B . Butterfly valve C . Gate valve D . Packless valve

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• The safety valve should be （） in the presence of C/E and Surveyor.

  A . tightened up B . sealed up C . opened up D . unscrewed

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• Control valves of a CO2 system may be located within the protected space when（）.

  A . it is impractical to locate them outside B . there is also a control valve outside C . the CO cylinders are also in the space D . an automatic heat-sensing trip is installed

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• The（） is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.

  A . main stem stop valve B . auxiliary steam stop valve C . feed check or control valve D . blow down valve

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• In the event of the cylinder starting valve leakage （） would pass into the air pipes and ignite the oil deposited.

  A . cooling water B . vapor from the boiler C . starting air D . hot gase

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• If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）

  A . valve will open later B . valves will close later C . amount of fuel injected will be increased D . amount of fuel injected will be decreased

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• A cutoff valve in the fire-main system of a ship may be closed to protect the portion of the system on an exposed deck from（）.

  A . damage from crane operations B . being used for wash down purposes C . accidental diversion of flow to wrong location D . freezing

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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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