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Which statement about entering into a tank which has been sealed for a long time is TRUE ________．A.The tank should be tested only once to ensure the oxygen content is at least 14% before entryB.The tank must be tested at frequent intervals to ensure that

题目

Which statement about entering into a tank which has been sealed for a long time is TRUE ________．

A.The tank should be tested only once to ensure the oxygen content is at least 14% before entry

B.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regenerated

C.The tank need not be tested for oxygen content if it is ventilated for more than 24 hours

D.If the oxygen content tests at less than 12% you should wear an approved gas mask

相似考题

1.Which statement is true about the frequency of OSPF LSA transmissions?()A.AB.BC.CD.D

2.A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate?A.The tank is safe to enterB.The tank is especially dangerous to enterC.Carbon monoxide(一氧化物) is presentD.Water vapor present when the tank was sealed has oxidized(使氧化)

3.Which statement about stowing spare hose is TRUE ________．A.Fold the hose so that the male coupling is about 4 feet from the female coupling，then roll it upB.Roll the hose starting at the female endC.Roll the hose starting at the male endD.Fold the hose into lengths about 6 feet long and then lash the folds together

4.Which statement is NOT true?A．Most callers are girl students．B．There are only a few callers every time．C．The students’ phones show that many parents failed in properly handling their children’ s problems．D．This special phone line has been in service for more than a year

更多“Which statement about entering into a tank which has been sealed for a long time is TRUE _ ”相关问题

  • 第1题：

    Which statement about entry into a space that has been sealed for a long time is TRUE ________．

    A.A tank that has been used to carry hazardous liquids should be tested for oxygen content，toxicity，and explosive gases

    B.You can safely enter the space without a breathing apparatus if the oxygen content exceeds 14%

    C.The natural ventilation through the installed vents is sufficient to provide the proper oxygen content

    D.The heat of the sun on upper ballast tanks，such as in a bulk carrier，may generate carbon monoxide


    正确答案：A

  • 第2题：

    Which statement about inert gas pressures in a cargo tank is TRUE ________．

    A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging

    B.Gas pressures should be maintained at the highest permissible level throughout the discharging process

    C.High gas pressures may cause pyrophoric oxidation in the tank

    D.High gas pressures may cause loss of suction when stripping


    正确答案：B

  • 第3题：


    Which of the following statements about Armold Schwarzenegger is TRUE？( )

    A.He was elected governor of California 10 years ago
    B.He used to attach much importance to personal enjoyment
    C.He has been thinking of solving sexual problems for long
    D.He has troubles with his two daughters and two sons

    答案：B
    解析：

  • 第4题：

    An SVI has been configured on a device. Which two statements are true about a switched virtualinterface （SVI）？（）

    • A、An SVI is normally created for the default VLAN （VLAN1） to permit remote switchadministration
    • B、Multiple SVIs can be associated with a VLAN
    • C、SVI is another name for a routed port
    • D、An SVI is created by entering the no switchport command in interface configuration mode
    • E、An SVI provides a default gateway for a VLAN

    正确答案:A,E

  • 第5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6题：

    Which statement is true about the UNDO_RETENTION parameter when retention guarantee is notenabled（）

    • A、It is the time period after which the undo data becomes obsolete.
    • B、It is the time period after which the committed undo data would be transferred to a temporarytablespace.
    • C、It is the minimum time period up to which the committed undo data would be retained if free undo spaceis available.
    • D、It is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.

    正确答案:C

  • 第7题：

    单选题
    Fuel oil tank vents are fitted with a screen which will stop（）.
    A

    oil from flowing out of the tank vent

    B

    air from entering the tank vent

    C

    vapors from leaving the tank vent

    D

    flames on deck from entering the tank vent


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    View the Exhibit to examine the metrics with a threshold.Which statement is true regarding the Number of Transactions (per second) metric?（）
    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.


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    我们的重吊杆已经长时间不用了。（）
    A

    Our derrick has been out of use for a long time.

    B

    Our heavy derrick has been out of use for a long time.

    C

    Our crane has been out of use for a long time.

    D

    Our winch has been out of use for a long time.


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which statement is true about the UNDO_RETENTION parameter when retention guarantee is not enabled（）
    A

    It is the time period after which the undo data becomes obsolete.

    B

    It is the time period after which the committed undo data would be transferred to a temporary tablespace.

    C

    It is the minimum time period up to which the committed undo data would be retained if free undo space isavailable.

    D

    It is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.


    正确答案： A
    解析： 暂无解析

  • 第11题：

    多选题
    An SVI has been configured on a device. Which two statements are true about a switched virtualinterface （SVI）？（）
    A

    An SVI is normally created for the default VLAN （VLAN1） to permit remote switchadministration

    B

    Multiple SVIs can be associated with a VLAN

    C

    SVI is another name for a routed port

    D

    An SVI is created by entering the no switchport command in interface configuration mode

    E

    An SVI provides a default gateway for a VLAN


    正确答案： B,D
    解析： 暂无解析

  • 第12题：

    单选题
    A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）
    A

    For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.

    B

    For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.

    C

    Direct inter-vlan communication does not require OSPF

    D

    OSPF cannot be used if router-on-a-stick is configured on the router


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which statement about the free surface effect is TRUE ________．

    A.It increases in direct proportion to the length of the tank times the breadth squared

    B.It decreases at increased angles of heel due to pocketing when a tank is 90% full

    C.It decreases in direct proportion to increasing specific gravity of the liquid in the tank

    D.In practice，the correction is considered to be a virtual reduction of KG


    正确答案：B

  • 第14题：

    Which statement about Belgium is NOT true?

    A.it is twice as big as Beijing.
    B.it has two major ethnic groups.
    C.it has gone through quite a few threats of division.
    D.it has no government.

    答案：D
    解析：

  • 第15题：


    Which of the following statements about Armold Schwarzenegger is TRUE？( )

    A.He was elected governor of California 10 years ago.
    B.He used to attach much importance to personal enjoyment.
    C.He has been thinking of solving sexual problems for long.
    D.He has troubles with his two daughters and two sons.

    答案：B
    解析：

  • 第16题：

    A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

    • A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.
    • B、For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.
    • C、Direct inter-vlan communication does not require OSPF
    • D、OSPF cannot be used if router-on-a-stick is configured on the router

    正确答案:C

  • 第17题：

    An SVI has been configured on a device.  Which two statements are true about a switched virtual interface （SVI）？（）

    • A、An SVI is normally created for the default VLAN （VLAN1） to permit remote switch administration.
    • B、Multiple SVIs can be associated with a VLAN.
    • C、SVI is another name for a routed port.
    • D、An SVI is created by entering the no switchport command in interface configuration mode. 
    • E、An SVI provides a default gateway for a VLAN.

    正确答案:A,E

  • 第18题：

    单选题
    You are loading a cargo tank on your container ship. The tank displays the red label shown. Which statement is TRUE? （）
    A

    The tank contains propylene

    B

    The tank's volume is 1077 cubic feet

    C

    There are three tanks in the shipment

    D

    The tank contains an oxidizing material


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    Which statement about stowing spare hose is TRUE（）.
    A

    Fold the hose so that the male coupling is about 4 feet from the female coupling，then roll it up

    B

    Roll the hose starting at the female end

    C

    Roll the hose starting at the male end

    D

    Fold the hose into lengths about 6 feet long and then lash the folds together


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    A tank which has been sealed for a long period of time can be dangerous because （）.
    A

    steel surfaces consume oxygen by rusting

    B

    sealed tanks usually form a vacuum

    C

    moisture condenses in the tank, displacing the oxygen

    D

    most tank coatings give off poisonous vapors in the presence of moisture


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which statement is true about the UNDO_RETENTION parameter when retention guarantee is notenabled（）
    A

    It is the time period after which the undo data becomes obsolete.

    B

    It is the time period after which the committed undo data would be transferred to a temporarytablespace.

    C

    It is the minimum time period up to which the committed undo data would be retained if free undo spaceis available.

    D

    It is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）
    A

    The tank is safe to enter

    B

    The tank is especially dangerous to enter

    C

    Carbon monoxide is present

    D

    Water vapor present when the tank was sealed has oxidized


    正确答案： B
    解析： 暂无解析

  • 第23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

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