单选题If a bilge pump failed to build up discharge pressure, you should check for ().Aexcessive water in the bilgesBa clogged suction strainerCoil in the bilgesDAll of the above

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


参考解析

解析: 暂无解析

相关考题:

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

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

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

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

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

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

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

单选题In () pump a closed discharge valve will not cause excessive pressure to build up.AgearBvaneCscrewDcentrifugal

单选题A centrifugal bilge pump requires priming ().Aprimarily to lubricate the shaft sealsBdue to the inability of this type of pump to lift water to cover the suction (eye) of the impellerCto initially unload the pump by having its head pressure equal to discharge pressureDin order to overcome the potential energy of water in the discharge line

单选题If a hydraulic pump is overheating, the cause may be ().Aexcessive internal leakage in the pumpBlow discharge pressure and fluid flowCexcessive fluid level in the hydraulic reservoirDoperation of the pump at 100% efficiency

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

单选题Which method should be used to warm up the pump turbines prior to discharge().ALock the turbine rotor and slowly bleed in steam until operating temperature is reachedBRun the pump at high speed with the discharge valves closedCRun the turbine at slow speed with the pump disconnectedDShut the discharge valve and run the pump at slow speed

单选题If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().Acapacity will increaseBcapacity will decreaseCsuction pressure will increaseDsuction pressure will decrease

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)

单选题The pressure difference of the gauge on the oily water separator increases greatly, the reason is()Athe filter is cloggedBbilge suction value is cloggedCsuction value and discharge value of the pump do not open fullyDscrew pump is worn seriously and volumetric efficiency is decreased

单选题Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited().AIt is required on all vesselsBIt may be located in a conspicuous place in the wheelhouseCIt may be located at the bilge and ballast pump control stationDAll of the above

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().Aexcessive pump speedBexcessive suction headCworn wearing ringsDgross pump misalignment

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().Abooster pump coming on the line and discharging properlyBbooster pump failing to startCbooster pump being lined up in the wrong directionDship's pump speeding up

单选题To maintain design discharge pressure from a centrifugal pump, the design clearance must be maintained between the ().Ashaft and impellerBmotor and pump shaftCcasing and impeller wearing ringsDlantern ring and impeller

单选题The () discharge a nearly constant amount of liquid regardless of pressure.Amixed-flow pumpBaxial-flow pumpCcentrifugal pumpDdisplacement pump

单选题The pump discharge pressure will be considerably higher than the pressure at the ().Apump entry branchBoutlet pipeCimpellerDNone of the above is true

单选题The boiler feed pump discharge pressure is higher than the steam drum pressure to ().Aensure feed water flow into the boilerBkeep the steam drum pressure highCprevent water hammer in the feed lineDhelp the feed water flash to steam

单选题The advantage of a centrifugal pump as compared with a reciprocating pump is that ().Adischarge is continuousBit has no internal valvesCupon accidental closing of discharge valve, excessive pressure will not build upDall of the above are true

单选题Oil water separators are used to ensure that ships don’t discharge oil when () bilge water.Ato pump offBbeing pumpedCpumping outDit pumping out

单选题One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the ().Amotor overload will openBrelief valve will openCpump will overheatDmotor will overheat

单选题An increase in the fuel injection pump discharge pressure can be caused by a/an ()Aleaking delivery valveBexcessive bearing end playCplugged injector spray holeDincreased plunger stroke

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?()AThe wearing rings are excessively wornBThe suction strainer is cloggedCThe discharge valve is cloggedDThe shaft is worn