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A hydraulic accumulator aboard a ship is designed to ______.
A.store fluid under pressure
B.act as a fluid reservoir
C.provide overpressure relief
D.replenish fluid to a system
参考答案
更多 “ A hydraulic accumulator aboard a ship is designed to ______.A.store fluid under pressureB.act as a fluid reservoirC.provide overpressure reliefD.replenish fluid to a system ” 相关考题
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Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an( ).A.overload on the pump motorB.low fluid level in the reservoirC.low fluid viscosity around the shaft sealD.high oil level in the sump
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If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to preventA.failure of the hydraulic hoseB.excessive flow through the lineC.friction in other areas of the hydraulic systemD.overheating of the hydraulic fluid
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Before doing any work on a hydraulic system equipped with accumulators, you shouldA.drain the accumulators and purge with oxygenB.bleed off all stored energy from the accumulators completelyC.charge the accumulators to prevent system energy lossD.pump the hydraulic fluid into the accumulators to prevent fluid loss
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The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by ______.A.dirtB.fuel oilC.governor cooling waterD.fuel oil tar(焦油)
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Which statement is TRUE concerning buoyant work vests aboard tankers ________．A.They may be worn while working on deck but not while working over the sideB.They must be used only under supervision of a designated ship's officerC.They will be accepted for up to 10% of the required life preserversD.They may be worn during drills
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An inflatable life raft should be lifted back aboard the ship by using ______.A.the single hook at the top of the raftB.two lines passed under the raftC.the towing bridleD.All of the above
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单选题An inflation life raft should be lifed back aboard the ship by using（）.A
the single hook at the top of the raftB
two lines passed under the raftC
the towing bridleD
All of the above
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单选题An inflatable liferaft should be lifted back aboard the ship by using（）.A
the single hook at the top of the raftB
two lines passed under the raftC
the towing bridleD
All of the above
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单选题A carling is used aboard ship（）.A
as a connecting strap between the butted ends of platingB
to stiffen areas under points of great stress between beamsC
to prevent the anchor from fouling when the brake is releasedD
to provide an extra heavy fitting in a heavy lift cargo rig
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单选题What is the function of an air receiver in the compressed air system on a ship? （）A
Condenses moistureB
Provides overpressure protectionC
Purifies the airD
Acts as an accumulator
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单选题A reservoir, as used in hydraulic systems aboard ship, is used to store hydraulic oilAnother function is to（）A
act as a shock absorberB
maintain the stored oil under pressureC
act as a base or foundation for the power unitD
eliminate pressure surges in the system
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单选题In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause（）A
molecular fluid vibrationB
energy lossesC
wide pressure variationsD
mechanical damage to control valves
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单选题The most common contaminate of governor hydraulic fluid is （）.A
moistureB
dirtC
acidD
air
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单选题A hydraulic accumulator aboard a ship is designed to（）.A
store fluid under pressureB
act as a fluid reservoirC
provide overpressure reliefD
replenish fluid to a system
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单选题If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.A
add fluid that is the same color as the fluid in the reservoirB
add turbine oil because it is always a good substituteC
add any oil that has the same viscosity as the hydraulic fluidD
check the winch manufacturers instruction book
考题
单选题Before doing any work on a hydraulic system equipped with accumulators, you should（）A
drain the accumulators and purge with oxygenB
bleed off all stored energy from the accumulators completelyC
charge the accumulators to prevent system energy lossD
pump the hydraulic fluid into the accumulators to prevent fluid loss
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单选题An orifice-check valve placed in a hydraulic system is used to（）A
regulate the fluid flow in either directionB
restrict movement of hydraulic fluid in one direction, but allow free movement in the other directionC
allow free movement of hydraulic fluid in both directionsD
allow a restricted fluid flow in one direction only
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单选题The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）A
dirtB
fuel oilC
governor cooling waterD
fuel oil tars
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单选题Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by（）A
permanent loss of pump suctionB
worn shaft sealsC
high level in the oil sumpD
low motor RPM
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单选题How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?（）A
clean the fittings before they are disconnectedB
Place drip pans under leaky fittingsC
Seal any cracks in lines with PermatexD
Coat all threads with graphite oil
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单选题Compensated flow control or constant flow valves are used in hydraulic systems to（）A
compensate for major leaks in the systemB
maintain the original fluid viscosityC
allow for changes in pressure and temperature within the systemD
assure constant fluid temperature
考题
单选题A hydraulic accumulator is designed to（）.A
store fluid under pressureB
act as a fluid reservoirC
provide overpressure reliefD
replenish fluid to a system
考题
单选题Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and （）.A
fluid frictionB
fluid turbulenceC
component misalignmentD
pressure surges
考题
单选题In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon（）A
the temperature of the hydraulic fluidB
the flow rate of the hydraulic fluidC
the temperature of the cooling waterD
all of the above
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单选题A carling is used aboard ship（）.A
as a connecting strap between the butted ends of platingB
to stiffen areas under points of great stress between beamsC
to prevent the anchor from fouling when the brake is releasedD
to provide an extra heavy fitting in a lift cargo released
考题
单选题Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.A
hydraulic fluid contaminationB
excessive fluid frictionC
turbulent fluid flowD
fluid pressure surges
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