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There are two classes of vessels which，to the extent necessary to carry out their work，do not have to comply with the rule regarding traffic separation schemes. One of these is a vessel（）.
A、engaged in fishing in a traffic lane
B、servicing a submarine cable
C、towing another
D、engaged on pilotage duty
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In a Teleworker deployment with a single IP phone connected to a Cisco 831 router, select the true statement regarding Call Admission Control.（）
A . RSVP is a required configuration to support conference calls without voice packet loss.
B . The QoS configuration on the 831 router must always provision sufficient bandwidth for two RTP streams.
C . Call admission control is an issue only when using hardware DSP resources.
D . When using the conference call features on a 7960 IP phone, only one RTP stream is present regardless of how many extensions are on the conference.
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A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with （）
A . a high viscosity index
B . a low viscosity index
C . neutralize acids
D . resist oxidation at high temperature
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Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to（）
A . facilitate bi-directional operation
B . provide the greatest pump efficiency
C . prevent pump clogging from marine growth
D . prevent cavitation at the pump outlet
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Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）
A . In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater
B . Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports
C . No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine
D . The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine
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View the Exhibit to examine the metrics with a threshold.Which statement is true regarding the Number of Transactions (per second) metric?（）https://assets.asklib.com/images/image2/2018080211100285691.jpg
A . Oracle uses statistical relevance to determine when an adaptive threshold has been breached for the metric.
B . The statistics for the metric values observed over the baseline time period are not examined to determine threshold values.
C . Oracle determines when an adaptive threshold has been breached based on the maximum value captured by the baseline.
D . The total concurrent number of threshold violations, which must occur before an alert is raised for the metric, has been set to zero.
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On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine （）
A . speed will drop drastically with any increase in load
B . will stop due to zero fuel supply
C . will stall upon application of load
D . speed will remain fairly constant despite load change
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With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to （）.
A . allow filtration of less viscous oil
B . decrease the pressure drop across the filter
C . improve overall filtration
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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Diesel powered industrial trucks on a ship that are provided with safeguards to the exhaust，fuel，and electrical systems are designated（）.
A . DEFE
B . DE
C . DS
D . DES
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A current Sun Solaris customer has just purchased their first p5 590. During the Solution Assurance, the backup requirements were discussed. Which of the following should be recommended to the customer with regards to restoring rootvg?（）
A . mksysb
B . restvg
C . AIX install CDs
D . Veritas NetBacku
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A four-stroke/cycle, 1000horsepower diesel engine fails to start at normal cranking speed with normal fuel pressure and ambient temperatureThe reason for the failure could be（）
A . glazed liners or pistons
B . high lube oil pressure
C . excessive compression ratio
D . worn valve seats and valve
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With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the（）
A . ignition quality of the fuel
B . high heating value of the fuel
C . amount of carbon residue after combustion
D . internal flow resistance in the injector
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If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
A . compression pressures are below normal
B . lube oil is diluted with fuel oil
C . cranking speed is too low
D . exhaust system is partially restricted
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A thrust bearing is used with a propulsion diesel engine to （）.
A . control axial movement of the crankshaft
B . transmit engine thrust to the propeller shaft
C . absorb vibrations in the propeller shafting
D . prevent propeller thrust from being transmitted to the hul
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Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）
A . increase blow-by in all cylinders
B . incomplete combustion in all cylinder
C . overloading in all cylinders
D . insufficient fuel delivery to all cylinder
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With regard to syllabus design, the Communicative Approach emphasizes topics.（）
A . 正确
B . 错误
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There is a growing realization that the only effective way to achieve further reductions in vehicle（）is to replace conventional diesel fuel and gasoline with cleaner-burning fuels.
A . permission
B . emission
C . omission
D . Missio
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“Harmony with Nature” leads to the “__________”, which holds that an __________is regarded as a member of a group.
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“Harmony with Nature” leads to the “__________”, which holds that an __________is regarded as a member of a group.
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_______ In the Arab world, a person’s smell is regarded as an extension of the person. To the Arab, good smells are pleasing and a way of being involved with each other.
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With regard to the opening and closing of watertight integrity appliances not fitted with a remote operating control or alarm system, what must the Master or person in charge of a ship enter in the logbook?
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With regard to the sentence "If you have a job, you're guaranteed to get angry", the author takes a ______ attitude.
A．positive
B．negative
C．indifferent
D．critical
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With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the__________
A.ignition quality of the fuel
B.high heating value of the fuel
C.amount of carbon residue after combustion
D.internal flow resistance in the injectors
