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 gasesB.You can safely enter the space without

题目

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

相似考题

1.It has been a long time _____I saw you last time.A.sinceB.forC.beforeD.after

2.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

3.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)

4.He has lived ( ) some foreign students for a long time.A、withB、inC、amongD、about

更多“Which statement about entry into a space that has been sealed for a long time is TRUE ____ ”相关问题

  • 第1题：

    A seaman you have just discharged has a Continuous Discharge Book. Which statement is TRUE?

    A.The record of entry in the continuous discharge book shall agree with the entry made in the Ship's Articles

    B.If the vessel was on coastwise articles，the record of discharge will be made in the Official Logbook

    C.An entry should be made in the book and a Certificate of Discharge issued to the seaman

    D.A Certificate of Discharge form should be attached to the book


    正确答案：A

  • 第2题：

    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


    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：

    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5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6题：

    单选题
    A seaman you have just discharged has a Continuous Discharge Book. Which statement is TRUE? （）
    A

    The record of entry in the continuous discharge book shall agree with the entry made in the Ship's Articles.

    B

    If the vessel was on coastwise articles，the record of discharge will be made in the Official Logbook.

    C

    An entry should be made in the book and a Certificate of Discharge issued to the seaman.

    D

    A Certificate of Discharge form should be attached to the book


    正确答案： A
    解析： 暂无解析

  • 第7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
    Which statement about the hospital space on a cargo ship is TRUE（）.
    A

    The hospital may be used for disciplinary confinement if it is not being used for treatment

    B

    The hospital space must have both a bathtub and shower

    C

    A hospital is required on all vessels with a crew of 12 or more if it makes overnight voyages

    D

    If a ship has a crew of forty-five who do not have their own room，the hospital must have four berths


    正确答案： D
    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 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11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 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

  • 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 systems administrator has a high performance server with a file share full of data that has not been used in a long time， but is still important and might be used in the future. Which of the following should they do to reclaim the space off the high performance server？（）

    • A、Audit the data
    • B、Delete the data
    • C、Back up the data
    • D、Archive the data

    正确答案:D

  • 第17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:C

  • 第18题：

    多选题
    You have enabled resumable space allocation in your database by setting the RESUMABLE_TIMEOUTparameter set to a nonzero value.Which three statements about resumable space allocation are true? （）(Choose three.)
    A

    Even with resumable space allocation enabled for your database, you can disable resumable space allocation for a single session.

    B

    A resumable statement is suspended only if an out of space error occurs.

    C

    When a resumable statement is suspended, the transaction that contains the statement is also suspended.

    D

    A resumable statement can only be suspended and resumed once during the execution of the statement.

    E

    You can query the V$SESSION_WAIT dynamic performance view to identify the statements that are suspended for a session


    正确答案： A,C,E
    解析： 暂无解析

  • 第19题：

    多选题
    You have enabled resumable space allocation in your database by setting the RESUMABLE_TIMEOUT parameter set to a nonzero value.Which three statements about resumable space allocation are true? （）
    A

    Even with resumable space allocation enabled for your database, you can disable resumable space allocation for a single session.

    B

    A resumable statement is suspended only if an out of space error occurs. （Out of space condition Maximum extents reached condition，Space quota exceeded condition）

    C

    When a resumable statement is suspended, the transaction that contains the statement is also suspended.

    D

    A resumable statement can only be suspended and resumed once during the execution of the statement.

    E

    You can query the V$SESSION_WAIT dynamic performance view to identify the statements that are suspended for a session.


    正确答案： C,D
    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
    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22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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