单选题Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）AThe high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pumpBRotary pumps are capable of pumping more fluid than reciprocating pumps of the same weightCRotary pumps occupy only one-half the space of reciprocating pumpsDRotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
单选题
Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）
A
The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump
B
Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight
C
Rotary pumps occupy only one-half the space of reciprocating pumps
D
Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
参考解析
解析：
暂无解析
相关考题：
Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?A.Control the amount of lube oil burned in the combustion chamberB.Transmit heat from the piston to the cylinder linerC.Prevent damage to ring groove inserts by acting as a heat damD.Dissipate combustion chamber gas pressure by channeling it through the ring gap
Which of the following statements represents an advantage of an electromagnetic clutch?A.Large misalignments can be tolerated between the shaft and engine couplingB.Slip is held to a minimum when reversing shaft rotationC.Engine torsional vibrations to the driven shaft are eliminatedD.It aids in maintaining power factor
Which of the following statements is NOT a way of consolidating vocabulary A.Defining.B.Matching.C.Gapfilling.D.Labeling.
Which best represents a typical attackthat takes advantage of RFC 792， ICMPType 3 messages？（）A、 Blind connection-resetB、 Large packet echo requestC、 Packet fragmentation offsetD、 Broadcast-based echo requestE、 Excessive bandwidth consumption
Which 4 statements regarding MPLS Label Stack Encoding is true？（）A、A value of 4 represents the "Implicit NULL Label."B、A value of 0 represents the "IPv4 Explicit NULL Label."C、A value of 1 represents the "Router Alert Label". The use of this label is analogous to the use of the"Router Alert Option" in IP packets （for example， ping with record route option）D、A value of 2 represents the "IPv6 Explicit NULL Label"E、A value of 1 represents the "IPv1 Explicit NULL Label"F、A value of 3 represents the "Implicit NULL Label"
Which of the following is an advantage of SMP？（）A、 Smaller initial investmentB、 Doubles memory requirementsC、 Higher simultaneous thread processingD、 Decreases overhead
Which of the following is an advantage of attaching a NAS device to the network？（）A、 Easier to secureB、 Ability to run remote applicationC、 Ease of configurationD、 Fault tolerance
Which of the following is an advantage of RAID 0？（）A、Mirrors dataB、RedundancyC、SpeedD、Automatic hot spare
Which of the following represents a wiring standard for twisted pair cables?（）A、FiberB、T568AC、IEEE1394D、CAT5
Which of the following represents a safety hazard？（）A、liquid on the floorB、a tiled floorC、a concrete floorD、carpet
Which of the following describes what the number two represents in l00Base2 cabling?（）A、FiberB、Coaxial cableC、UTPD、Twisted pair
Which of the following is an advantage of a virtualized server environment？（）A、 Higher administrative complexityB、 Increased level of securityC、 More effective usage of computing resourcesD、 Improved performance for users
The internet address 198.102.27.120 represents which of the following addresses？（）A、Class AB、Class BC、Class CD、Class D
多选题Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)Ac=dBl and k are parallelCm and l are perpendicular
多选题Which of the following statements are true? (Indicate all such statements.)Aτ(5) =τ(7)Bτ(5) τ(7) =τ(35)Cτ(5) + τ(7) =τ(12)
单选题Which of the following statements represents an advantage of an electromagnetic clutch?（）ALarge misalignments can be tolerated between the shaft and engine couplingBSlip is held to a minimum when reversing shaft rotationCEngine torsion vibrations to the driven shaft are eliminatedDIt aids in maintaining power factor
单选题Which of the following statements is TRUE concerning the po column of the vmstat command？（）A The sys is high when po is high.B The po represents the number of page steals.C The low values usually indicate insufficient paging space.D The low values usually indicate sufficient memory for the load.
单选题Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component （）AWear rubber gloves and bootsBUse only approved non-conducting toolsCGround the case of the machine before beginning any repairsDOpen the supply circuits and tag the switches
单选题Which best represents a typical attackthat takes advantage of RFC 792， ICMPType 3 messages？（）A Blind connection-resetB Large packet echo requestC Packet fragmentation offsetD Broadcast-based echo requestE Excessive bandwidth consumption
单选题Which of the following statements represents the main difference between a relay and a contactor?（）AContactors control current and relays control voltageBA relay is series connected and a contactor is parallel connectedCContactors can handle heavier loads than relaysDContactors are made from silver and relays are made from copper
单选题Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）ATo test the starting systemBTo remove air bubbles from the jacket waterCTo ensure that the lube oil system delivers pressureDTo ensure foreign material (water etc) is not present in the cylinders
单选题Which of the following is an advantage of SMP？（）A Smaller initial investmentB Doubles memory requirementsC Higher simultaneous thread processingD Decreases overhead
单选题Which of the following represents a wiring standard for twisted pair cables?（）AFiberBT568ACIEEE1394DCAT5
单选题Which of the following represents a safety hazard？（）Aliquid on the floorBa tiled floorCa concrete floorDcarpet
单选题Which of the following most closely represents an image copy? （）AUnix cp command of a fileBBit-by-bit copy of a fileCWindows COPY command of a file DAll of the above