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Which statement concerning current is TRUE ________．A.Current can be determined by measuring the direction and distance between simultaneous EP and DR positionsB.The drift of the current should be averaged out on a one hour basisC.After the current is det

题目

Which statement concerning current is TRUE ________．

A.Current can be determined by measuring the direction and distance between simultaneous EP and DR positions

B.The drift of the current should be averaged out on a one hour basis

C.After the current is determined，it should not be used for further plotting because it is an unknown variable

D.The distance between a simultaneous DR position and fix is equal to the drift of the current

相似考题

1.Which statement is true concerning dropping a pluggable database (PDB)?()A. The PDB must be open in read-only mode.B. The PDB must be in mount state.C. The PDB must be unplugged.D. The PDB data files are always removed from disk.E. A dropped PDB can never be plugged back into a multitenant container database (CDB).

2.Which statement is TRUE concerning the flash point of a substance ________．A.It is lower than the ignition temperatureB.It is the temperature at which a substance will spontaneously igniteC.It is the temperature at which a substance，when ignited，will continue to burnD.It is the temperature at which the released vapors will fall within the explosive range

3.Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited ________．A.It is required on all vesselsB.It may be located in a conspicuous place in the wheelhouseC.It may be located at the bilge and ballast pump control stationD.All of the above

4.Which statement about vlan operation on cisco catalyst switches is true?()A. when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.B. unkown unicast frames are retransmitted only to the ports that belong to the same vlanC. ports between switches should be configured in access mode so that vlans can span across the portsD. broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

更多“Which statement concerning current is TRUE ________.A.Current can be determined by measuri ”相关问题

  • 第1题：

    Which statement is TRUE concerning combustible gas indicators ________．

    A.One sample of air is adequate to test a tank

    B.They do not work properly where there is a lack of oxygen

    C.They will detect a lack of oxygen

    D.They are calibrated to read the percentage chance of explosion


    正确答案：B

  • 第2题：

    Which statements concerning the switch construct are true？（）  

    • A、All switch statements must have a default label.
    • B、There must be exactly one label for each code segment in a switch statement.
    • C、The keyword continue can never occur within the body of a switch statement.
    • D、No case label may follow a default label within a single switch statement.
    • E、A character literal can be used as a value for a case label.

    正确答案:E

  • 第3题：

    Which statement about vlan operation on cisco catalyst switches is true?（）

    • A、when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.
    • B、unkown unicast frames are retransmitted only to the ports that belong to the same vlan
    • C、ports between switches should be configured in access mode so that vlans can span across the ports
    • D、broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

    正确答案:B

  • 第4题：

    Which statement is true concerning dropping a pluggable database (PDB)?（）

    • A、The PDB must be open in read-only mode.
    • B、The PDB must be in mount state.
    • C、The PDB must be unplugged.
    • D、The PDB data files are always removed from disk.
    • E、A dropped PDB can never be plugged back into a multitenant container database (CDB).

    正确答案:B

  • 第5题：

    单选题
    Which statement about stopping a vessel is TRUE?（）
    A

    A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern

    B

    A vessel is dead in the water when the back wash from astern operation reaches the bow

    C

    A tunnel bow thruster can be used in an emergency to reduce the stopping distance

    D

    When a vessel is dead in the water any speed displayed by doppler log reflects the current


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    Which statement is TRUE concerning the gooseneck（）.
    A

    It is a sailing maneuver which brings the vessel's head through the wind

    B

    It connects the boom to the mast and allows the boom to swing freely

    C

    It is a sailing condition where there is a loss of air flow over the sails

    D

    None of the above


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    Which statement is true concerning dropping a pluggable database (PDB)?（）
    A

    The PDB must be open in read-only mode.

    B

    The PDB must be in mount state.

    C

    The PDB must be unplugged.

    D

    The PDB data files are always removed from disk.

    E

    A dropped PDB can never be plugged back into a multitenant container database (CDB).


    正确答案： E
    解析： 暂无解析

  • 第8题：

    单选题
    Which statements concerning the switch construct are true？（）
    A

    All switch statements must have a default label.

    B

    There must be exactly one label for each code segment in a switch statement.

    C

    The keyword continue can never occur within the body of a switch statement.

    D

    No case label may follow a default label within a single switch statement.

    E

    A character literal can be used as a value for a case label.


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Which statement is true regarding synonyms?（）
    A

    Synonyms can be created only for a table 

    B

    Synonyms are used to reference only those tables that are owned by another user 

    C

    A public synonym and a private synonym can exist with the same name for the same table 

    D

    The DROP SYNONYM statement removes the synonym, and the table on which the synonym has been created becomes invalid


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    Which statement is TRUE concerning lifeboat gripes?（）
    A

    They must be released by freeing a safety shackle

    B

    They should not be released until the boat is in lowering position

    C

    They may be adjusted by a turnbuckle

    D

    They are normally used only with radial davits


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Which statement is TRUE concerning the tandem working arrangement of pedestal cranes when completing a quad lift? （）
    A

    The discharge is slow due to the size of the cargo and all the cranes working together

    B

    The cargo discharge can be accomplished with controlled pendulation

    C

    The cargo discharge can be performed in port or at anchor

    D

    The cranes enable the handling of heavy cargos without shoreside assistance


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Which statement concerning current is TRUE（）.
    A

    Current can be determined by measuring the direction and distance between simultaneous EP and DR positions

    B

    The drift of the current should be averaged out on a one hour basis

    C

    After the current is determined，it should not be used for further plotting because it is an unknown variable

    D

    The distance between a simultaneous DR position and fix is equal to the drift of the current


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which statement concerning GPS is TRUE ________．

    A.It cannot be used in all parts of the world

    B.There are 12 functioning GPS satellites at present

    C.It may be suspended without warning

    D.Two position lines are used to give a 2D fix


    正确答案：C

  • 第14题：

    Which statement is true about IBGP routers? （）

    • A、They must be fully meshed
    • B、They can be in a different AS
    • C、They must be directly connected

    正确答案:C

  • 第15题：

    Which statement is true about The QoS Class Fibre Channel？（）

    • A、 Cannot be disabled
    • B、 Cannot have the CoS changed
    • C、 Can have "Packet Drop" enabled
    • D、 Is multicast optimized
    • E、 Can have the MTU changed

    正确答案:A

  • 第16题：

    Which three are true?（）

    • A、A MERGE statement is used to merge the data of one table with data from another.
    • B、A MERGE statement replaces the data of one table with that of another.
    • C、A MERGE statement can be used to insert new rows into a table.
    • D、A MERGE statement can be used to update existing rows in a table.

    正确答案:A,C,D

  • 第17题：

    单选题
    Which statement is TRUE concerning the danger signal?（）.
    A

    When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal

    B

    Only the stand-on vessel can sound the danger signal

    C

    Distress signals may be used in place of the danger signal

    D

    The danger signal consists of 4 or more short blasts of the whistle


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    Which statement is true concerning 6to4 tunneling?（）
    A

    The edge routers can use any locally configured  IPv6 address.

    B

    Hosts and routers inside a 6to4 site will need a special code.

    C

    An edge router must use IPv6 address of 2002::/16 in its prefix.

    D

    IPv4 traffic is encapsulated with an IPv6 header.


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    Which statement is true about IBGP routers? （）
    A

    They must be fully meshed

    B

    They can be in a different AS

    C

    They must be directly connected


    正确答案： A
    解析： 暂无解析

  • 第20题：

    多选题
    Which three are true?（）
    A

    A MERGE statement is used to merge the data of one table with data from another.

    B

    A MERGE statement replaces the data of one table with that of another.

    C

    A MERGE statement can be used to insert new rows into a table.

    D

    A MERGE statement can be used to update existing rows in a table.


    正确答案： D,B
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following statements is true concerning simple parallel resistance circuits?（）
    A

    The total current flow equals the sum of the individual currents

    B

    The total current flow equals the reciprocal of the sum of the individual currents

    C

    The total resistance equals the sum of the individual resistance

    D

    The total voltage equals the sum of the individual voltages across each resistance


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Which statement concerning Montauk Point Light is TRUE（）.
    A

    The light comes on at sunset

    B

    There is an emergency light if the main light is extinguished

    C

    The height of the light is 24 feet

    D

    The tower is painted with black and white stripes


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    Which statement is TRUE concerning fuel vapors on a vessel（）.
    A

    Fuel vapors gather in the lowest portions of the vessel

    B

    Fuel vapors can only be ignited by an open flame

    C

    Vent outlets should be located above the level of the carburetor air intake

    D

    None of the above


    正确答案： B
    解析： 暂无解析

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