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
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
相关考题：
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
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
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
Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and ______.A.fluid frictionB.fluid turbulenceC.component misalignmentD.pressure surges
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)
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
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
单选题An inflation life raft should be lifed back aboard the ship by using（）.Athe single hook at the top of the raftBtwo lines passed under the raftCthe towing bridleDAll of the above
单选题An inflatable liferaft should be lifted back aboard the ship by using（）.Athe single hook at the top of the raftBtwo lines passed under the raftCthe towing bridleDAll of the above
单选题A carling is used aboard ship（）.Aas a connecting strap between the butted ends of platingBto stiffen areas under points of great stress between beamsCto prevent the anchor from fouling when the brake is releasedDto provide an extra heavy fitting in a heavy lift cargo rig
单选题What is the function of an air receiver in the compressed air system on a ship? （）ACondenses moistureBProvides overpressure protectionCPurifies the airDActs as an accumulator
单选题A reservoir, as used in hydraulic systems aboard ship, is used to store hydraulic oilAnother function is to（）Aact as a shock absorberBmaintain the stored oil under pressureCact as a base or foundation for the power unitDeliminate pressure surges in the system
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（）Amolecular fluid vibrationBenergy lossesCwide pressure variationsDmechanical damage to control valves
单选题A hydraulic accumulator aboard a ship is designed to（）.Astore fluid under pressureBact as a fluid reservoirCprovide overpressure reliefDreplenish fluid to a system
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 （）.Aadd fluid that is the same color as the fluid in the reservoirBadd turbine oil because it is always a good substituteCadd any oil that has the same viscosity as the hydraulic fluidDcheck the winch manufacturers instruction book
单选题Before doing any work on a hydraulic system equipped with accumulators, you should（）Adrain the accumulators and purge with oxygenBbleed off all stored energy from the accumulators completelyCcharge the accumulators to prevent system energy lossDpump the hydraulic fluid into the accumulators to prevent fluid loss
单选题An orifice-check valve placed in a hydraulic system is used to（）Aregulate the fluid flow in either directionBrestrict movement of hydraulic fluid in one direction, but allow free movement in the other directionCallow free movement of hydraulic fluid in both directionsDallow a restricted fluid flow in one direction only
单选题The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）AdirtBfuel oilCgovernor cooling waterDfuel oil tars
单选题Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by（）Apermanent loss of pump suctionBworn shaft sealsChigh level in the oil sumpDlow motor RPM
单选题How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?（）Aclean the fittings before they are disconnectedBPlace drip pans under leaky fittingsCSeal any cracks in lines with PermatexDCoat all threads with graphite oil
单选题Compensated flow control or constant flow valves are used in hydraulic systems to（）Acompensate for major leaks in the systemBmaintain the original fluid viscosityCallow for changes in pressure and temperature within the systemDassure constant fluid temperature
单选题A hydraulic accumulator is designed to（）.Astore fluid under pressureBact as a fluid reservoirCprovide overpressure reliefDreplenish fluid to a system
单选题Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and （）.Afluid frictionBfluid turbulenceCcomponent misalignmentDpressure surges
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（）Athe temperature of the hydraulic fluidBthe flow rate of the hydraulic fluidCthe temperature of the cooling waterDall of the above
单选题A carling is used aboard ship（）.Aas a connecting strap between the butted ends of platingBto stiffen areas under points of great stress between beamsCto prevent the anchor from fouling when the brake is releasedDto provide an extra heavy fitting in a lift cargo released
单选题Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.Ahydraulic fluid contaminationBexcessive fluid frictionCturbulent fluid flowDfluid pressure surges