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单选题
The emergency bilge suction valve is typically used （）.
A
to inject cleaning additives when the bilges are extremely dirty
B
when the main condenser becomes fouled, in order to provide additional cooling water circulation
C
to connect the rose box to the independent bilge suction
D
if the bilges become flooded and they can not be emptied by any other means
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更多 “单选题The emergency bilge suction valve is typically used （）.A to inject cleaning additives when the bilges are extremely dirtyB when the main condenser becomes fouled, in order to provide additional cooling water circulationC to connect the rose box to the independent bilge suctionD if the bilges become flooded and they can not be emptied by any other means” 相关考题
考题
Accidental flooding of the engine room bilges by the bilge main is prevented by( ).A.stop-check valves installed in the bilge suction manifoldsB.using a positive displacement reciprocating bilge pumpC.installing educators in all bilge rose boxesD.installing a swing check before each bilge valve
考题
To add refrigerant to the low side of an air conditioning system, the refrigerant should be introduced through the_______ .A.suction service valve as a vaporB.suction service valve as a liquidC.discharge service valve as a vaporD.charging valve as a liquid
考题
If the suction pressure for an operating refrigeration compressor is below normal, the cause may be ______.A.an excess of liquid refrigerantB.the expansion valve overfeedingC.a fouled compressor suction strainerD.the compressor short cycling
考题
Before discharge of cargo tank ballast is undertaken，______．A.the deck isolating valve is openB.flue gas isolating valveC.blower suction valveD.blower discharge valve
考题
The fitting at the end of a cargo line in a tank that allows suction to be taken close to the bottom of a tank is a ______．A.Suction endB.StrainerC.Bell-mouthD.Vacuum valve
考题
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
考题
单选题Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?（）A
the direct acting relief valve is used for controlling lower flows and pressureB
the pilot operated relief valve is used for controlling higher flows and pressureC
the pilot operated relief valve is used for controlling lower flows and pressureD
the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
考题
单选题An emergency bilge pumping system is provided and should be （） of the main bilge pumping system, according to the SOLAS 74 Convention.A
dependentB
in dependentC
in seriesD
in parallel
考题
单选题If a centrifugal bilge pump were continually operated with the discharge valve closed the （）.A
motor overload would openB
relief valve would openC
pump would eventually overheatD
motor would overheat
考题
单选题Accidental flooding of the engine room bilges by the bilge main is prevented by （）.A
stop-check valves installed in the bilge manifoldsB
using a positive displacement reciprocating bilge pumpC
installing eductors in all bilge rose boxesD
installing a swing check before each bilge valve
考题
单选题The emergency bilge suction or bilge （） is used to prevent flooding of the ship.A
injection valveB
relief valveC
discharge valveD
inlet filter
考题
单选题The emergency bilge suction or bilge injection valve is used to prevent （） of the ship.A
proceedingB
overloadingC
collisionD
flooding
考题
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）A
failure of the proper operation of emergency generatorB
insulation of piping including exhaust pipes in engine room contaminated by oilC
improper operation of bilge of bilge of bilge pumping arrangementsD
damaged sanitary pump
考题
单选题The SOLAS convention about “passenger ship and dried food ship damage control” prescribes that the engine room emergency bilge water suction should connect with （）A
the main S-W pumpB
ballast pumpC
air-conditioning water pumpD
the main S-W pump or ballast pumps that have the biggest output
考题
单选题Which of the following would not cause high suction pressure?（）A
insufficient refrigerationB
leaky suction valvesC
expansion valve stuck openD
suction valve not adjusted properly
考题
单选题According to the SOLAS convention, the bilge water system （）A
must connect the bilge well suction directlyB
should not pump out the water accumulated in the cargosC
should not used for emergency drainage in case of ship collisionD
should connect to the fire fighting system directly
考题
单选题An independent bilge suction is required for （）.A
ballast tanksB
sludge tanksC
machinery space bilgesD
cargo hold bilges
考题
单选题If one of the bilge system manifold valves does not properly seat, the （）A
bilge well connected to that valve, plus the second bilge well being pumped will be completely emptiedB
bilge system will lose vacuum and prevent the other bilges from being pumped outC
bilge well aft connected to that valve will siphon its contents to the forward bilge wellsD
discharge pressure will be too high
考题
单选题You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what actionshould be carried out?（）A
Send the wiper into the well with only a scoop and pailB
Remove the bilge manifold valve and attempt to back flush the lineC
Simultaneously operate all available bilge pumpsD
It is only necessary to transfer half the contents of a drum of degreaser into the bilge well
考题
单选题If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT （）.A
the circuit breakerB
for leaks in the suction pipingC
relief valve is not properly seatedD
the suction strainer
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In a refrigeration system, which of the following statements describes the actions occurring when a solenoid valves, used in conjunction with an unloader head is energized?（）A
The solenoid valves directs high pressure gas to the valve lifting device raising the suction valve off its seat and causing one specific cylinder to become unloadedB
The solenoid valves directs high pressure gas to the underside of the unloading piston, causing it to rise and allowing the recirculating ports to be openedC
When the solenoid valve becomes energized, the valve ports become closed, allowing discharge pressure to build up above the piston, shifting it and causing it to unloadD
The solenoid valve allows the refrigerant to pass from the suction chamber to the top of the unloader piston, causing the piston to lift and unload the cylinder
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
考题
单选题The major difference between the discharge and suction valves installed in most low pressure, reciprocating air compressors is that（）A
one valve seats upwards, while the other seats downwardsB
the reed valves used on the discharge are made substantially thicker and heavier than the suction valvesC
the suction valve springs exert a greater tension than the discharge valve springsD
the discharge valve springs exert a greater tension than the suction valve springs
考题
单选题A bilge suction line，in a fishing vessel with more than 16 individuals aboard，must have a strainer with an open area not less than how many times the open area of the suction line?（）A
oneB
twoC
threeD
four
考题
单选题A simple pumping system consists of a suction branch, a pump and （）.A
a priming deviceB
a discharge branchC
a filterD
a suction valve
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