Cargo pump relief valves are piped to the ______．A.cargo pump pressure gaugesB.crossover lines interconnecting two pumpsC.suction side of pumpsD.atmosphere through pump vents
Cargo pump relief valves are piped to the ______．
A.cargo pump pressure gauges
B.crossover lines interconnecting two pumps
C.suction side of pumps
D.atmosphere through pump vents
相关考题：
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
After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?A.The relief valves in the system should be readjustedB.The filters and strainers should be checked frequentlyC.All system pressure should be readjustedD.The system should be drained and renewed with a fluid of different operating characteristics
A fire pump may be used for other purposes if ______.A.the other services are run off a reducing station with a pressure gageB.one of the required pumps is kept available for use on the fire main system at all timesC.no relief valves are installedD.all of the above conditions are met
How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?A.With gooseneck ventsB.With warning signsC.With flame screensD.With pressure-vacuum relief valves
What is the purpose of pressure-vacuum relief valves ________．A.Regulation of discharge pressure from cargo pumpsB.Maintaining constant velocity in cargo linesC.Regulation of suction head on cargo pumpsD.To maintain a tank or void at atmospheric pressure
What is the purpose of the relief valve of a cargo pump ________．A.Provides for the removal of vaporsB.Allows two or more tanks to be filled at the same timeC.Provides for the emergency shutdown of the pumpD.Permits the return of cargo to the suction side of the pump
Which statement is TRUE concerning cargo hose on tank barges ________．A.Cargo hose must be able to withstand the shut-off head plus the static head of the cargo pumpB.Cargo hose must be able to withstand the static head of the cargo pump but no less than 100 psiC.Cargo hose must be able to withstand the shut-off head less the static head of the cargo pump but no less than 100 psiD.Cargo hose must be able to withstand at least 150 psi
All of the following steps are taken in starting a centrifugal pump，EXCEPT to ______．A.Set the relief valveB.Check the lubrication systemC.Vent the pump casingD.Open the pump suction and discharge valves
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When the desired rudder angle is attained by a typical double mm electro-hydraulic steering gear,the（）.Aram relief valves bypass oil to stop rudder movementBsix-way valve shifts to the neutral flow positionCsteering pump electric motor is de - energized by the transfer switchDfollow-up gear takes the hydraulic pump off stroke
单选题When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?（）AThe six-way valve opensBThe steering service pump motor is stoppedCThe follow-up gear takes the pump off strokeDThe cylinder relief valves bypass oil to the suction side the pump
单选题（） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.AA relief valveBAn alarmCA pressure gaugeDA non-maim valve
单选题Air trapped in the hydraulic fluid of a steering system should be indicated by （）.Athe pump over-speedingBan improper rudder responseCbubbles in the sight glassDram relief valves lifting
单选题What is the purpose of pressure-vacuum relief valves? （）ARegulation of discharge pressure from cargo pumpsBMaintaining constant velocity in cargo linesCRegulation of suction head on cargo pumpsDTo maintain a tank or void at atmospheric pressure
单选题Cargo pump relief valves are piped to the（）.Acargo pump pressure gaugesBcrossover lines interconnecting two pumpsCsuction side of pumpsDatmosphere through pump vents
单选题After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）AThe relief valves in the system should be readjustedBThe filters and strainers should be checked frequentlyCAll system pressure should be readjustedDThe system should be drained and renewed with a fluid of different operating characteristics
单选题When loading bulk liquid cargo，what is the FIRST action you should take if a cargo valve jammed open?（）ATrip the pump relief valveBOrder the dock man to shut downCCall the owner，operator，or terminal supervisorDRun out the vessel's or terminal's fire hose
单选题Blow-off of the relief valves of the main cylinders during operation indicates （）.Athe cylinder cover is crackedBthe injector holes is cloggedCthe cams are not properly setDfuel pump is leaking
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All of the following steps are taken in starting a centrifugal pump，EXCEPT to（）.Aset the relief valveBcheck the lubrication systemCvent the pump casingDopen the pump suction and discharge valves
单选题A fire pump may be used for other purposes if（）.Athe other services are run off a reducing station with a pressure gageBone of the required pumps is kept available for use on the fire main system at all timesCno relief valves are installedDall of the above conditions are met
单选题A relief valve for a cargo pump is generally installed（）.Aafter the discharge valveBbetween the pump and discharge valveCafter the suction valveDbetween the pump and suction valve
单选题Low compression pressure in a diesel engine may be the result of （）Ainsufficient fuel supply due to fuel pump valves sticking or leakingBexcessive mechanical clearance between the piston crown and cylinder headCexcessively worn fuel pump plungerDexcessive exhaust back pressure
单选题The lifting pressure of （） is set in the presence of a Surveyor it is locked and cannot be changed.Afuel valves of main engineBinjector pump of main engineCsafety valves of marine boilerDsafety valves of a reciprocating pump
单选题According to regulations，a cargo hose used for transferring liquefied gases must have a bursting pressure of（）.A5 times the maximum working pressure on the hose during cargo transferBone half the designed working pressureC4 times the pressure of the cargo pump used for transferringD5 times the minimum working pressure on the hose during cargo transfer
单选题Each fire pump on a ship must have a pressure gauge located at（）.Athe pump dischargeBthe manifold connectionCeach fire station dischargeDthe pump station
单选题If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.Aa low load on the unitBa clogged pump suction strainerCa blockage in the line between the pump and hydraulic motorDthe hydraulic motor turning too fast