网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
The valve which is most suited for regulating the flow through a pipeline is a （）
A
gate valve
B
globe valve
C
swing-check valve
D
plug-cock valve
参考答案
参考解析
解析：
暂无解析
更多 “单选题The valve which is most suited for regulating the flow through a pipeline is a （）A gate valveB globe valveC swing-check valveD plug-cock valve” 相关考题
考题
Which Packet Flow Acceleration feature is most effective for short－lived TCP sessions?()
A. Active Flow PipeliningB. Fast Connection SetupC. TCP Acceleration (AFP)D. Forward Error Correction
考题
What type of valve is used to direct the flow of hydraulic fluid?A.relief valveB.direction control valveC.stop valveD.pressure control valve
考题
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open ________．A.Globe valveB.Butterfly valveC.Gate valveD.Packless valve
考题
Which technology is best suited for the most scalable means to separate the data plane for aLayers VPN？（）A、 GREB、 802 1QC、 MPLSD、 L2TPv3
考题
单选题The thermal expansion valve controls the amount of refrigerant that is allowed to flow to the （）.A
compressorB
cooling coilsC
condenserD
receiver
考题
单选题Which of the following pumps is most suitable for an oily water separator?（）A
reciprocating pumpB
vane pumpC
mono pumpD
axial-flow pump
考题
单选题What type of valve is used to direct the flow of hydraulic fluid?（）A
Relief valveB
Direction control valveC
Stop valveD
Pressure control valve
考题
单选题Which of the following statements concerning butterfly valves is correct?（）A
Special tools are required for lapping or grindingB
It is impossible to throttle flow with a butterfly valveC
To close the valve, it is only necessary to turn the handle a quarter of a turnD
The butterfly valve should never be used in a freshwater system
考题
单选题In which of the scavenging methods listed will the exhaust valve be located in the cylinder head?（）A
Return-flowB
UniflowC
Cross-flowD
Direct flow
考题
单选题In a refrigeration system, foaming of the crankcase oil may cause the （）.A
expansion valve to overfeedB
compressor to knockC
water regulating valve to failD
crankcase drains to plug
考题
单选题Unlike the globe valve, gate valves give full bore flow without change of direction, such a valve is not suitable to partially open operationAccording to the above sentence, which of the following statements is not true?（）A
The globe valve may be suitable for partially open operationB
The globe valve will give full bore flow with change of directionC
The gate valve gives full bore flow with change of directionD
The gate valve is suitable for full bore operation only
考题
单选题If a refrigeration compressor will not start, the reason may be （）.A
the pressure regulating valve is not closingB
an excessive lack of refrigerant in the systemC
badly leaking discharge valvesD
worn piston rings
考题
单选题Which of the following statements is true concerning centrifugal pumps?（）A
They are particularly suited for pumping high viscosity fluidsB
They are started with the discharge valve openedC
The flow of liquid is developed by imparting energy due to the rotation of an impellerD
They are always mounted in a horizontal position
考题
单选题If the head pressure of a reciprocating refrigeration compressor is excessive, （）.A
the relief valve should open before the high pressure cutoutB
the relief valve should open and allow the excess refrigerant to flow to the receiverC
the high pressure cutout switch should operate before the relief valve opensD
you should close in on the suction valve
考题
单选题The valve which is most suited for regulating the flow through a pipeline is a （）A
gate valveB
globe valveC
swing-check valveD
plug-cock valve
考题
单选题At which of the following locations would a duplex pressure gage most likely be located?（）A
Fuel oil service pump dischargeB
Fuel oil strainerC
Fuel oil heaterD
Fuel oil flow meter
考题
单选题Overflow valve is used to （）A
control the fluid flow through itB
prevent the pressure before it over the specified valveC
make the pressure after it steadyD
control the direction of oil flow
考题
单选题The valve best suited for throttling gas or liquid flow in a pipeline is the（）.A
gate valveB
globe valveC
check valveD
plug cock
考题
单选题Which technology is best suited for the most scalable means to separate the data plane for aLayers VPN？（）A
GREB
802 1QC
MPLSD
L2TPv3
考题
单选题According to the passage, which of the following statements is true?A
The imaging techniques not only measure nerve-cell activity but also the extra flow of blood that surges to the most active brain areas.B
The imaging techniques do not measure nerve-cell activity directly, but measure the flow of blood that surges to the most active brain areas.C
The imaging techniques measure the extra flow of blood that surges to the most active brain areas.D
The imaging techniques measure all the activities of the living brain.
考题
单选题While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding back from the evaporator is determined to be the causeIt may be necessary to （）.A
change the expansion valve adjustmentB
readjust the water regulating valve to increase the flow of waterC
purge air from the condenserD
clean the waterside of the condenser
考题
单选题Which Packet Flow Acceleration feature is most effective for short-lived TCP sessions?（）A
Active Flow PipeliningB
Fast Connection SetupC
TCP Acceleration (AFP)D
Forward Error Correction
考题
单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
The expansion tank should be topped offB
The thermostatic water regulating valves should be manually openedC
The fuel filters should be changedD
The engine should be turned over slowly with the indicator cocks open
考题
单选题The direct acting mechanical governor used with some small diesel engines, controls fuel flow to the engine by（）A
governor flyweight action on a pilot valve which controls fuel injectionB
governor flyweight motion acting on fuel controls through suitable linkageC
positioning a butterfly valve in the fuel delivery system positioningD
a servomotor piston attached to the fuel controls
考题
单选题If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged?（）A
CentrifugalB
GearC
PropellerD
Turbine
热门标签
最新试卷