单选题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 outletB Gravity causes the oil to flow toward the dischargeC The self-priming feature of the cent

题目
单选题
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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  • 第1题:

    22 Which of the following statements about limited liability companies’ accounting is/are correct?

    1 A revaluation reserve arises when a non-current asset is sold at a profit.

    2 The authorised share capital of a company is the maximum nominal value of shares and loan notes the company

    may issue.

    3 The notes to the financial statements must contain details of all adjusting events as defined in IAS10 Events after

    the balance sheet date.

    A All three statements

    B 1 and 2 only

    C 2 and 3 only

    D None of the statements


    正确答案:D

  • 第2题:

    Which of the following statements about internet is (are) correct?

    Ⅰ.Each host in internet only has a IP address.

    Ⅱ.It is possible to have multiple names corresponding to the same IP address.

    Ⅲ.In users' points, Internet means a virtual network.

    A.None

    B.Ⅰ and Ⅱ

    C.Ⅱ and Ⅲ

    D.All


    正确答案:C

  • 第3题:

    Which of the following statements about ORACLE is (are) correct?

    Ⅰ.ORACLE follows SQL standard

    Ⅱ.ORACLE database defines two logical types: table and view

    A.Ⅰonly

    B.Ⅱ only

    C.Ⅰ and Ⅱ

    D.none of the above


    正确答案:C

  • 第4题:

    Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command:   RESTORE CONTROLFILE FROM AUTOBACKUP;   Which of the following statements is true?() 

    • A、 The command restores only the missing control file.
    • B、 The command restores all the control files.
    • C、 The command fails because the database is running.
    • D、 This is the correct way to address this problem.
    • E、 This is not the correct way to address this problem.

    正确答案:C,E

  • 第5题:

    Which of the following statements is correct regarding a hybridcrypto system?()

    • A、 uses symmetric crypto for keys distribution
    • B、 uses symmetric crypto for proof of origin
    • C、 uses symmetric crypto for fast encrypted/decryption
    • D、 uses asymmetric crypto for message confidentiality
    • E、 uses symmetric crypto to transmit the asymmetric keys that is thenused to encrypt a session

    正确答案:C

  • 第6题:

    单选题
    Which of the following statements concerning energy is correct?()
    A

    Energy can be created or destroyed

    B

    Energy may not be transformed

    C

    The total quantity of energy in the universe is always the same

    D

    None of the above


    正确答案: D
    解析: 暂无解析

  • 第7题:

    单选题
    Which of the following statements concerning cargo is correct?()
    A

    Cargoes are any type of goods transported by any type of ships

    B

    Cargoes are goods transported in bulk

    C

    Cargoes usually include goods transported in bulk and in containers

    D

    Cargoes are usually packaged in containers


    正确答案: D
    解析: 暂无解析

  • 第8题:

    单选题
    Which of the following statements concerning fire-tube boilers is correct?()
    A

    Combustion gases flow through the tubes

    B

    Flames impinge on the tubes

    C

    Combustion occurs in the tubes

    D

    Water flows through the tubes


    正确答案: D
    解析: 暂无解析

  • 第9题:

    单选题
    Which of the following statements about general cargoes is not correct?()
    A

    General cargoes are neither liquid nor solid bulk cargo

    B

    General cargoes are packaged hazardous cargoes

    C

    General cargoes are also called breakbulk cargoes

    D

    General cargoes are mostly carried on container ships now


    正确答案: A
    解析: 暂无解析

  • 第10题:

    单选题
    Which of the following statements concerning fuel atomization in a diesel engine cylinder is correct?()
    A

    The greater the atomization, the greater the penetration

    B

    The greater the atomization, the less the penetration

    C

    The degree of atomization has nothing to do with the degree of penetration

    D

    Atomization and penetration are one and the same


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    Which of the following statements is correct concerning the viscosity of lubricating oil?()
    A

    Viscosity will increase as temperature increases

    B

    Viscosity is a measure of a fluid s internal resistance to flow

    C

    Viscosity will decrease as temperature decreases

    D

    Viscosity is not dependent on temperature


    正确答案: B
    解析: 暂无解析

  • 第12题:

    单选题
    Which of the following statements is correct relative to distillation plant operation?()
    A

    Distillation is the process of boiling seawater to produce vapor which is condensed into fresh water

    B

    Evaporation is the second part of the distillation process where brine is removed

    C

    Brine is the result of condensed sea water vapor

    D

    Distillate is the product resulting from the evaporation of fresh water vapor


    正确答案: D
    解析: 暂无解析

  • 第13题:

    12 Which of the following statements are correct?

    (1) Contingent assets are included as assets in financial statements if it is probable that they will arise.

    (2) Contingent liabilities must be provided for in financial statements if it is probable that they will arise.

    (3) Details of all adjusting events after the balance sheet date must be given in notes to the financial statements.

    (4) Material non-adjusting events are disclosed by note in the financial statements.

    A 1 and 2

    B 2 and 4

    C 3 and 4

    D 1 and 3


    正确答案:B

  • 第14题:

    In the following statements about graph operations,which one is NOT correct?

    A.Finding critical path is an operation on directed graph

    B.Finding critical path is an operation on undirected graph

    C.Spanning tree of a graph may not be unique

    D.Minimum spanning tree of a graph may not be unique


    正确答案:B

  • 第15题:

    Which of the following statements is correct regarding an oil with a high viscosity index?

    A.A large change of viscosity occurs with a minor change in temperature

    B.No change in viscosity occurs with any change in temperature

    C.Very little change in viscosity occurs with a significant change in temperature

    D.The viscosity of the oil increases with an increase in temperature


    正确答案:C

  • 第16题:

    Which of the following are correct statements?()

    • A、EIGRP advertises the best routes to its neighbor
    • B、EIGRP uses "cost" to determine best path
    • C、EIGRP allows unequal cost load balancing
    • D、OSPF requires neighbor adjacencies before updates are sent
    • E、EIGRP advertises all routes to its neighbor
    • F、OSPF allows unequal cost load balancing

    正确答案:A,C,D

  • 第17题:

    Which of the following is the correct term for a virtual machine?()

    • A、 Hypervisor
    • B、 Guest OS
    • C、 Virtual Center
    • D、 Host OS

    正确答案:B

  • 第18题:

    多选题
    Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command:   RESTORE CONTROLFILE FROM AUTOBACKUP;   Which of the following statements is true?()
    A

    The command restores only the missing control file.

    B

    The command restores all the control files.

    C

    The command fails because the database is running.

    D

    This is the correct way to address this problem.

    E

    This is not the correct way to address this problem.


    正确答案: C,E
    解析: 暂无解析

  • 第19题:

    单选题
    I saw a ship stop at a(). Which of the following is not correct?
    A

    deck

    B

    harbour

    C

    pier

    D

    port


    正确答案: B
    解析: 暂无解析

  • 第20题:

    单选题
    Which of the following statements is correct concerning the “flash point ” of a liquid?()
    A

    It is lower than the ignition temperature

    B

    It is the temperature at which a substance will spontaneously ignite

    C

    It is the temperature at which a substance, when ignited, will continue to bum

    D

    It is the temperature at which the released vapors will fall within the explosive range


    正确答案: A
    解析: 暂无解析

  • 第21题:

    单选题
    I think they are() Which of the following is not correct?
    A

    Briton

    B

    British

    C

    English

    D

    Englishmen


    正确答案: D
    解析: 暂无解析

  • 第22题:

    单选题
    Which one of the following statements about the TNSPING utility is correct?()
    A

    It helps you to determine whether or not the Oracle database is running.

    B

    It requires the username and password to check the connectivity of the service.

    C

    It does not require the username and password to check the connectivity of the service.

    D

    It establishes a session with the database and checks the connectivity of the service.


    正确答案: D
    解析: 暂无解析

  • 第23题:

    单选题
    Which of the following statements is correct regarding an oil with a high viscosity index?()
    A

    A large change of viscosity occurs with a minor change in temperature

    B

    No change in viscosity occurs with any change in temperature

    C

    Very little change in viscosity occurs with a significant change in temperature

    D

    The viscosity of the oil increases with an increase in temperature


    正确答案: C
    解析: 暂无解析