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 pressure of a liquid leaving the pump can be referred to as the （）.
A
total head
B
discharge head
C
net positive suction head
D
suction head
参考答案
参考解析
解析：
暂无解析
更多 “单选题The pressure of a liquid leaving the pump can be referred to as the （）.A total headB discharge headC net positive suction headD suction head” 相关考题
考题
Which of the following terms is used to identify the pressure of the liquid entering a pump?A.Suction headB.Pump headC.Discharge headD.Total head
考题
Which statement is NOT true?A.In a simple vane pump, the rotor and cam ring are exactly concentricB.Balanced vane pump has an elliptical cam ringC.Liquid in both gear pump and vane pump are forced out to the outlet.D.Balanced vane pumps can work at a higher pressure than the simple vane pump
考题
The amount of fluid delivered by a positive displacement pump can be regulated by _____.A.throttling the pressure lineB.changing the speed of the driving rotorC.either A or BD.None of the above is tree
考题
The pressure of a liquid leaving the pump can be referred to as the ______.A.total headB.discharge headC.net positive suction headD.suction head
考题
单选题Reid vapor pressure is（）.A
exerted by liquid cargo on the sides of a tankB
exerted by liquid cargo on a cargo hose bodyC
the lowest temperature and pressure that will cause a flammable liquid to give off vaporsD
a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
考题
单选题A positive displacement pump is that where the volume of the pump chamber is alternately increased to （） and then decreased to （）.A
draw the liquid in；force the liquid outB
force the liquid out；draw the liquid inC
suction；drawD
deliver；outlet
考题
单选题Refrigerant enters the condenser as a （）.A
high pressure liquidB
low pressure vaporC
high pressure vaporD
low pressure liquid
考题
单选题A multistage centrifugal pump can be BEST described as having （）.A
two or more impellers housed together in one casing and mounted on a single shaftB
a single stepped impeller mounted in a progressively staged casingC
a large radial clearance between the impeller and casing to prevent overheating due toD
an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
考题
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 flowB
A substance must be cold in order for it to be pumpedC
The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic systemD
A pump must receive its energy from an external source
考题
单选题Before liquid can flow into a pump, the air in the suction line must be （） sufficiently to cause the liquid to flow into the suction chamber.A
filledB
evacuatedC
compressedD
charged
考题
单选题The static suction lift of a pump is the difference in elevation between the （）.A
centerline of the pump and the level of the liquid in the suction well when the source of liquid is below the pumpB
centerline of the pump and the suction liquid level when the source of liquid is above the pumpC
centerline of the pump and the level of the discharge liquidD
liquid levels of the suction and discharge
考题
单选题If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.A
capacity will increaseB
capacity will decreaseC
suction pressure will increaseD
suction pressure will decrease
考题
单选题The （） pump discharges a nearly constant amount of liquid regardless of pressure.A
mixed-flowB
axial-flowC
centrifugalD
displacement
考题
单选题A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.A
high pressure liquid lineB
low pressure liquid lineC
high pressure vapor lineD
low pressure vapor line
考题
单选题A pump is said to have "negative suction head" when the pump is located （）.A
between the suction and dischargeB
below the liquid supplyC
above the liquid supplyD
any of the above
考题
单选题A positive displacement pump is that where the volume of the pump chamber is alternately （） to draw the liquid in and then （） to force the liquid out.A
increased；decreasedB
decreased；increasedC
decreased；decreasedD
increased；increased
考题
单选题A pump is defined as device that（）A
produces pressureB
imparts energy to a fluid to move it from level ‘A’ to level ‘B’C
creates a vacuum to move a liquid in all installationD
is to develop a pressure differential
考题
单选题Which of the following terms is used to identify the pressure of the liquid entering a pump?（）A
Suction headB
Pump headC
Discharge headD
Total head
考题
单选题The basic function of the centrifugal pump impeller is to （）.A
directly increase the pressure of the liquid being pumpedB
directly increase the velocity of the liquid being pumpedC
convert the potential energy of the liquid to kinetic energyD
separate air from the liquid being pumped
考题
单选题The amount of fluid delivered by a gear pump can be regulated by （）.A
throttling the pressure lineB
changing the speed of the rotorC
either A or BD
None of the above is true
考题
单选题The static suction head of is the （）A
distance of the suction liquid level above the line of the pumpB
distance the suction liquid level is below the center line of the pumpC
force necessary to overcome frictional losses in the pump and pipingD
amount in inches of mercury the total suction head is below atmospheric pressure
考题
单选题The （） discharge a nearly constant amount of liquid regardless of pressure.A
mixed-flow pumpB
axial-flow pumpC
centrifugal pumpD
displacement pump
考题
单选题What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）A
RefrigeratorB
RefrigerantC
Cooling mediumD
Brine
考题
单选题An increase in the fuel injection pump discharge pressure can be caused by a/an （）A
leaking delivery valveB
excessive bearing end playC
plugged injector spray holeD
increased plunger stroke
考题
单选题A （） pump is that where the volume of the pump chamber is alternately increased to draw the liquid in and then decreased to force the liquid out.A
injectorB
positive displacementC
centrifugalD
centripetal
考题
单选题The amount of fluid delivered by a positive displacement pump can be regulated by （）.A
throttling the pressure lineB
changing the speed of the driving rotorC
either A or BD
None of the above is tree
考题
单选题Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）A
ImpellerB
Electric motorC
VoluteD
Eye
热门标签
最新试卷
