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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