Which pump must always be primed ________．A.Centrifugal pumpB.Reciprocating pumpC.Rotary pumpD.All of the above

题目

Which pump must always be primed ________．

A.Centrifugal pump

B.Reciprocating pump

C.Rotary pump

D.All of the above

相似考题

1.No matter what you may say, he () to his own views.A.would always stickB.will always stickC.should always stickD.must always stick to

2.Which statement is NOT true?A.While displacement pump works, volume of the working chamber will increase and decrease alternatelyB.A gear pump always has two gearsC.Any vane pump will have a rotor within a ringD.A balanced vane pump has two outlet ports and they are positioned symmetrically

3.Which statement is TRUE concerning cargo hose on tank barges ________．A.Cargo hose must be able to withstand the shut-off head plus the static head of the cargo pumpB.Cargo hose must be able to withstand the static head of the cargo pump but no less than 100 psiC.Cargo hose must be able to withstand the shut-off head less the static head of the cargo pump but no less than 100 psiD.Cargo hose must be able to withstand at least 150 psi

4.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).

更多“Which pump must always be primed ________.A.Centrifugal pumpB.Reciprocating pumpC.Rotary p ”相关问题

  • 第1题：

    Which statement is TRUE concerning deep well self-priming pumps ________．

    A.When loading oil cargo，it is always loaded via the discharge line through to the pump until the tank is topped off

    B.Stripping systems are generally eliminated for the purposes of cargo handling

    C.In recent years deep well pumps have become increasingly unpopular in product tankers and medium size crude ships

    D.There is no danger of damaging the pump from overheating


    正确答案：B

  • 第2题：

    The network consists of a series of routers that are all configured for IBGP. Which one of thefollowing IBGP characteristics is true？（）

    • A、The IBGP routers must always be fully meshed
    • B、The IBGP routers can be in a different AS
    • C、The IBGP routers must be directly connected
    • D、The IBGP routers do not need to be directly connected
    • E、None of the other alternatives apply are true

    正确答案:D

  • 第3题：

    A developer wants too use EL to invoke a function using S{my：bloof（“foof”）}. Which is always true？（）

    • A、 The method invoked by this function must be statie.
    • B、 The function class must implement the Function interface.
    • C、 The expression is NOT a valid EL expression for invoking a function.
    • D、 The function must be declared in a web.xml file using the  element.
    • E、 The function class must have a method with the signature：Void bloof （java.lang.Strings）

    正确答案:A

  • 第4题：

    单选题
    While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）
    A

    Delivery check valve

    B

    Pump barrel

    C

    Tubing to the injector

    D

    Cam follower


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the following statements about pump operations is NOT a correct statement?（）
    A

    In order for a fluid to be pumped, a fluid must be made to flow

    B

    A substance must be cold in order for it to be pumped

    C

    The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system

    D

    A pump must receive its energy from an external source


    正确答案： D
    解析： 暂无解析

  • 第6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7题：

    单选题
    In a diesel engine jacket water cooler, with seawater cooling the fresh water, the（）
    A

    sea water temperature must never be warmer than 40℃

    B

    jacket water pressure should always be greater than the sea water pressure

    C

    jacket water temperature must always be less than 60℃

    D

    jacket water pressure must always be less than the sea water pressure


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the listed statements is correct concerning the starting of centrifugal pumps?（）
    A

    They should always be started with the discharge valve closed

    B

    They should always be started with the discharge valve opened

    C

    A priming pump is always required to flood the impeller suction

    D

    They should always be started with the sealing line valves closed


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    To maintain design discharge pressure from a centrifugal pump, the design clearance must be maintained between the （）.
    A

    shaft and impeller

    B

    motor and pump shaft

    C

    casing and impeller wearing rings

    D

    lantern ring and impeller


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    To thoroughly pump out the bilges using a horizontally mounted centrifugal pump, the （）.
    A

    pump must always be primed

    B

    volute must impart a radial and rotary motion of the water suction side

    C

    connection must guide the liquid to the lantern rings

    D

    stuffing box should not be allowed any water leakage


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Each fire pump on a ship must have a pressure gauge located at（）.
    A

    the pump discharge

    B

    the manifold connection

    C

    each fire station discharge

    D

    the pump station


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    If the plunger or barrel of a fuel injection jerk pump becomes damaged,（）
    A

    only the replacement of the entire pump would be acceptable

    B

    the injection pump and injection nozzle must be replaced

    C

    either the barrel or plunger must be replaced

    D

    the barrel and plunger must be replaced as a unit


    正确答案： A
    解析： 暂无解析

  • 第13题：

    What is true regarding subqueries?（）

    • A、The inner query always sorts the results of the outer query
    • B、The outer query always sorts the results of the inner query
    • C、The outer query must return a value to the outer query
    • D、The inner query returns a value to the outer query
    • E、The inner query must always return a value or the outer query will give an error

    正确答案:D

  • 第14题：

    A System p distribution customer is very concerned about Reliability， Availability and  Serviceability （RAS）. They are planning to install several p6 servers in their facilities and want to be able to move an LPAR from one System p to another.  Which of the following would accomplish this（）

    • A、System p servers using similar SAN storage
    • B、System p servers must share an HMC
    • C、System p servers must have the same level HMC
    • D、System p servers with VIOS

    正确答案:B

  • 第15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16题：

    单选题
    The network consists of a series of routers that are all configured for IBGP. Which one of thefollowing IBGP characteristics is true？（）
    A

    The IBGP routers must always be fully meshed

    B

    The IBGP routers can be in a different AS

    C

    The IBGP routers must be directly connected

    D

    The IBGP routers do not need to be directly connected

    E

    None of the other alternatives apply are true


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Which pump installation would require an external source of sealing water?（）
    A

    Main circulator pump jacket water cooling

    B

    Salt water service pump

    C

    Auxiliary condensate pump

    D

    Bilge pump


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.
    A

    the pump cylinder

    B

    the pump cam

    C

    the pump plunger

    D

    the pump miler


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    Which pump is the self-priming pump?（）
    A

    turbine

    B

    centrifugal

    C

    ejector

    D

    mixed flow


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the following pumps belongs to centrifugal pump?（）
    A

    Piston pump

    B

    Screw pump

    C

    Diffuser pump

    D

    Water-ring pump


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    Which of these is a prerequisite for and must always run with Cisco NSF?（）
    A

    RPR

    B

    BGP

    C

    SSO

    D

    SRM


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    With reference to a radial piston pump, which one of the following statements is false?（）
    A

    Surrounding the fixed shaft is a hollow shaft

    B

    This hollow shaft carries radial bores

    C

    Each bore is fitted with a well-lapped plunger

    D

    There are always even numbers of bores


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    For pumping the bilges，a 54 foot long “T-Boat”，which is not a ferry，but is certificated to carry 30 passengers，must be fitted with at least（）.
    A

    one fixed power pump and one portable hand pump

    B

    one fixed hand pump and one portable hand pump

    C

    two portable hand pumps

    D

    either A or B


    正确答案： C
    解析： 暂无解析

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