单选题Which maintenance functions can a GMDSS Radio Operator perform（）.AThe Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percentBThe Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstaclesCAll levels of maintenance must be performed by a licensed GMDSS Radio MaintainerDThe Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints
单选题
Which maintenance functions can a GMDSS Radio Operator perform（）.
A
The Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percent
B
The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstacles
C
All levels of maintenance must be performed by a licensed GMDSS Radio Maintainer
D
The Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints
参考解析
解析：
暂无解析
相关考题：
Which two statements are true with respect to the maintenance window? () A. A DBA can enable or disable an individual task in all maintenance windows.B. A DBA cannot change the duration of the maintenance window after it is created.C. In case of a long maintenance window, all Automated Maintenance Tasks are restarted every four hours.D. A DBA can control the percentage of the resource allocated to the Automated Maintenance Tasks in each window.
What is the minimum requirement of a GMDSS operator?A.GMDSS operator licenseB.Third officer licenseC.General Radiotelephone Operator license and Radar EndorsementD.General Radiotelephone license or First or Second Class Radiotelegraph license with GMDSS Radio Officer’s endorsement
Which of the following statements is TRUE regarding crane operations ________．A.Radio communications allow the crane operator to disregard the use of hand signalsB.The crane operators and signalman must be familiar with the correct hand signalsC.The forward cranes can be operated from the bridgeD.The aft cranes can be operated from the aft steering station
When the GMDSS Radio Operator on watch hears“SECURITE”spoken three times he can expect to receive a message concerning ______．A.The safety of navigation or important meteorological warningsB.The safety of a vessel or a person is in jeopardyC.A vessel in need of immediate assistanceD.A coast station traffic list
Which device provides the main means in the GMDSS for locating ships in distress or their survival craft ________．A.Radio direction finderB.Satellite EPIRBsC.MF/HF DSCD.VHF homing device
Which maintenance functions can a GMDSS Radio Operator perform ________．A.The Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percentB.The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstaclesC.All levels of maintenance must be performed by a licensed GMDSS Radio MaintainerD.The Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints
Which message categories cannot be disabled by the GMDSS radio operator ________．A.Navigational WarningsB.Meteorological WarningsC.Search and Rescue InformationD.All of the above
Which statement concerning GMDSS Radio Operator requirements is FALSE ________．A.Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at seaB.Each compulsory vessel must carry at least two licensed Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as wellC.Communications involving safety of life at sea do not have to be logged as long as the compulsory vessel was not involved in such communicationsD.While at sea，adjustments to，and the maintaining of，GMDSS equipment may be performed by the GMDSS Radio operator as long as the work is supervised by an onboard licensed GMDSS Radio Maintainer
Which statement concerning satellite EPIRBs is TRUE ________．A.Once activated，these EPIRBs continuously send up a signal for use in identifying the vessel and for determining the position of the beaconB.The coded signal identifies the nature of the distress situationC.The coded signal only identifies the vessel's name and port of registryD.If the GMDSS Radio Operator does not program the EPIRB，it will transmit default information such as the follow-on communications frequency and mode
Which statement is generally correct regarding the maintenance requirements for ships under GMDSS ________．A.Redundancy of functions of certain equipment will partially meet this requirementB.On-board maintenance provided by a person holding a GMDSS maintainer's license will partially meet the requirementsC.Shoreside maintenance and scheduled tests and inspections will partially meet this requirementD.All of the above
Which statement is TRUE ________．A.GMDSS radio logs are required to contain entries pertaining to all incidents connected to radio communication service which appear to be of importance to the safety of life at seaB.All distress communications must be entered in the GMDSS radio log．C.Both of the aboveD.None of the above
Which statement is TRUE ________．A.Key letters or abbreviations may not be used in GMDSS radio logbooks under any circumstanceB.Urgent communications do not need to be entered in the GMDSS radio logC.Both of the aboveD.None of the above
For GMDSS，when may a compulsory vessel not be allowed to leave port ________．A.When the vessel is in an overloaded conditionB.When the vessel has arranged for both duplication of equipment AND shore-based maintenanceC.When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or loggedD.When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions
Which three statements about subqueries are true?（）A、A single row subquery can retrieve only one column and one row.B、A single row subquery can retrieve only one row but many columns.C、A multiple row subquery can retrieve multiple rows and multiple columns.D、A multiple row subquery can be compared by using the “” operator.E、A single row subquery can use the IN operator.F、A multiple row subquery can use the “=” operator.
Which two statements are true with respect to the maintenance window？（） .A、 A DBA can enable or disable an individual task in all maintenance windows.B、 A DBA cannot change the duration of the maintenance window after it is created.C、 In case of a long maintenance window，all Automated Maintenance Tasks are restarted every four hours.D、 A DBA can control the percentage of the resource allocated to the Automated Maintenance Tasks in each window
单选题What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）ANo action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequencyBThe operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was receivedCThe Operator should immediately set continuous watch on VHF channel 70DThe Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
单选题For GMDSS，which statement concerning a compulsory vessel is FALSE?（）AA conditional or partial exemption may be granted，in exceptional circumstances，for a single voyage outside the sea area for which the vessel is equippedBOnce a compulsory vessel's GMDSS station has been fitted and inspected，the station must be inspected only once every five yearsCAll passenger vessels and all cargo vessels that are 300 Gross Tons or larger must complyDCompulsory vessels must carry at least two licensed GMDSS Radio Operators
单选题Which statement is TRUE（）.AKey letters or abbreviations may not be used in GMDSS radio logbooks under any circumstanceBUrgent communications do not need to be entered in the GMDSS radio logCBoth of the aboveDNone of the above
单选题Which statement is TRUE（）.AGMDSS radio logs are required to contain entries pertaining to all incidents connected to radio communication service which appear to be of importance to the safety of life at seaBAll distress communications must be entered in the GMDSS radio logCBoth of the aboveDNone of the above
单选题For GMDSS，when may a compulsory vessel not be allowed to leave port?（）AWhen the vessel is in an overloaded conditionBWhen the vessel has arranged for both duplication of equipment AND shore-based maintenanceCWhen the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or loggedDWhen the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions
单选题Which message categories cannot be disabled by the GMDSS radio operator（）.ANavigational WarningsBMeteorological WarningsCSearch and Rescue InformationDAll of the above
单选题What are the conditions，under GMDSS，whereby a ship is NOT allowed to depart from any port? （）AThe vessel is not capable of performing all required distress and safety functionsBThe vessel is carrying more than the required number of qualified GMDSS radio operatorsCThe vessel has a temporary waiver of its radio license and Safety CertificateDThe vessel is not carrying a GMDSS radio maintainer，but has provided for shoreside maintenance plus duplication of equipment if required
单选题Which statement concerning GMDSS Radio Operator requirements is FALSE（）.AEach compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at seaBEach compulsory vessel must carry at least two licensed Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as wellCCommunications involving safety of life at sea do not have to be logged as long as the compulsory vessel was not involved in such communicationsDWhile at sea，adjustments to，and the maintaining of，GMDSS equipment may be performed by the GMDSS Radio operator as long as the work is supervised by an onboard licensed GMDSS Radio Maintainer
多选题Which two are true about aggregate functions?（）AYou can use aggregate functions in any clause of a SELECT statement.BYou can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.CYou can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.DYou can pass column names, expressions, constants, or functions as parameter to an aggregate function.EYou can use aggregate functions on a table, only by grouping the whole table as one single group.FYou cannot group the rows of a table by more than one column while using aggregate functions.
多选题Which two statements are true with respect to the maintenance window？（） .AA DBA can enable or disable an individual task in all maintenance windows.BA DBA cannot change the duration of the maintenance window after it is created.CIn case of a long maintenance window，all Automated Maintenance Tasks are restarted every four hours.DA DBA can control the percentage of the resource allocated to the Automated Maintenance Tasks in each window
多选题Which three statements about subqueries are true?（）AA single row subquery can retrieve only one column and one row.BA single row subquery can retrieve only one row but many columns.CA multiple row subquery can retrieve multiple rows and multiple columns.DA multiple row subquery can be compared by using the operator.EA single row subquery can use the IN operator.FA multiple row subquery can use the = operator.
单选题Which statement is generally correct regarding the maintenance requirements for ships under GMDSS（）.ARedundancy of functions of certain equipment will partially meet this requirementBOn-board maintenance provided by a person holding a GMDSS maintainer's license will partially meet the requirementsCShoreside maintenance and scheduled tests and inspections will partially meet this requirementDAll of the above