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
If a bilge pump failed to build up discharge pressure, you should check for （）.
A
excessive water in the bilges
B
a clogged suction strainer
C
oil in the bilges
D
All of the above
参考答案
参考解析
解析：
暂无解析
更多 “单选题If a bilge pump failed to build up discharge pressure, you should check for （）.A excessive water in the bilgesB a clogged suction strainerC oil in the bilgesD All of the above” 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 of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? l.Its discharge is continuous; ll.It has no internal valves: lll.Upon accidental closing of discharge valve, excessive pressure will not build up()A.l, llB.ll, lllC.l ,ll.IIID.llonly
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
If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably ______.A.excessive pump speedB.excessive suction headC.worn wearing ringsD.gross pump misalignment
考题
If you must pump bilges while a vessel is in port，you should pump only ______．A.If discharge is led to a shore tank or bargeB.During the hours of darknessC.On the outgoing tideD.As much as is necessary
考题
Which method should be used to warm up the pump turbines prior to discharge ________．A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reachedB.Run the pump at high speed with the discharge valves closedC.Run the turbine at slow speed with the pump disconnectedD.Shut the discharge valve and run the pump at slow speed
考题
You start a centrifugal cargo pump to discharge cargo．The pump works for a while and then loses suction．This could be caused by ______．A.The pump running backwardsB.Incomplete primingC.The discharge head being too highD.All of the above
考题
单选题In （） pump a closed discharge valve will not cause excessive pressure to build up.A
gearB
vaneC
screwD
centrifugal
考题
单选题A centrifugal bilge pump requires priming （）.A
primarily to lubricate the shaft sealsB
due to the inability of this type of pump to lift water to cover the suction (eye) of the impellerC
to initially unload the pump by having its head pressure equal to discharge pressureD
in order to overcome the potential energy of water in the discharge line
考题
单选题If a hydraulic pump is overheating, the cause may be （）.A
excessive internal leakage in the pumpB
low discharge pressure and fluid flowC
excessive fluid level in the hydraulic reservoirD
operation of the pump at 100% efficiency
考题
单选题Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?（） (1) Its discharge is continuous (2) It has no internal valves (3) Upon accidental closing of discharge valve, excessive pressure will not build upA
（1），（2）B
（2），（3）C
（1），（2），（3）D
（2）only
考题
单选题Which method should be used to warm up the pump turbines prior to discharge（）.A
Lock the turbine rotor and slowly bleed in steam until operating temperature is reachedB
Run the pump at high speed with the discharge valves closedC
Run the turbine at slow speed with the pump disconnectedD
Shut the discharge valve and run the pump at slow speed
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Which of the following pumps will build up a bursting pressure or stall their motors if the discharge valves are closed?（） (1) gear (2) centrifugal (3) screwA
（1）and（2）B
（1），（2）and（3）C
（1）and（3）D
（2）and（3）
考题
单选题The pressure difference of the gauge on the oily water separator increases greatly, the reason is（）A
the filter is cloggedB
bilge suction value is cloggedC
suction value and discharge value of the pump do not open fullyD
screw pump is worn seriously and volumetric efficiency is decreased
考题
单选题Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.A
It is required on all vesselsB
It may be located in a conspicuous place in the wheelhouseC
It may be located at the bilge and ballast pump control stationD
All of the above
考题
单选题If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably（）.A
excessive pump speedB
excessive suction headC
worn wearing ringsD
gross pump misalignment
考题
单选题The terminal indicates to you that they are going to use a booster pump to assist the discharging operation. You start the discharge，and in a few minutes the pressure drops sharply. This could be a result of the（）.A
booster pump coming on the line and discharging properlyB
booster pump failing to startC
booster pump being lined up in the wrong directionD
ship's pump speeding up
考题
单选题To maintain design discharge pressure from a centrifugal pump, the design clearance must be maintained between the （）.A
shaft and impellerB
motor and pump shaftC
casing and impeller wearing ringsD
lantern ring and impeller
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The pump discharge pressure will be considerably higher than the pressure at the （）.A
pump entry branchB
outlet pipeC
impellerD
None of the above is true
考题
单选题The boiler feed pump discharge pressure is higher than the steam drum pressure to （）.A
ensure feed water flow into the boilerB
keep the steam drum pressure highC
prevent water hammer in the feed lineD
help the feed water flash to steam
考题
单选题The advantage of a centrifugal pump as compared with a reciprocating pump is that （）.A
discharge is continuousB
it has no internal valvesC
upon accidental closing of discharge valve, excessive pressure will not build upD
all of the above are true
考题
单选题Oil water separators are used to ensure that ships don’t discharge oil when （） bilge water.A
to pump offB
being pumpedC
pumping outD
it pumping out
考题
单选题One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the （）.A
motor overload will openB
relief valve will openC
pump will overheatD
motor will overheat
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If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?（）A
The wearing rings are excessively wornB
The suction strainer is cloggedC
The discharge valve is cloggedD
The shaft is worn
热门标签
最新试卷