单选题In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）AHard rubberBCanvasCLeatherDSponge rubber
单选题
In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
A
Hard rubber
B
Canvas
C
Leather
D
Sponge rubber
参考解析
解析：
暂无解析
相关考题：
Delivery must be effected within the time stated on the purchase order, ()the Buyer must atits opinion cancel the order.A、whileB、otherwiseC、untillD、in case of
The acceptance letter must contain the order number and date as well as other information concerning the execution of the order.()
Injectors for use with heavy fuel oil must be cooled by either water or light oil to_____.A.prevent heat corrosion to internal componentsB.increase fuel delivery rate and economyC.prevent pre-ignitionD.avoid carbonization of the nozzle tips
Which two settings must be configured in order to use the GUI to configure Call Admission Control with voice applications?() A. QoS must be set to PlatinumB. WMM must be enabledC. QoS must be set to GoldD. TSPEC must be disabledE. Cisco Compatible Extensions must be disabled
In order to prevent a person ______ general average contribution on the ground that he was at fault，the fault must be something which constitutes an actionable wrong．A.to recoverB.to be recoveredC.being recoveredD.recovering
Electrical wiring on all "T-Boats" must be ______.A.concealed to prevent mechanical damageB.concealed so the boat can be maintained more easilyC.protected from the weatherD.in an accessible place behind the ceiling
The canal must be wide enough to permit two of the largest boats using it to pass each other easily.It must be deep enough to leave about two feet of water（ ）the keel of the largest boat using the canal.A.downB.belowC.beneathD.off
The writers of the Constitution worked out the Constitution worked out the checks and balances in order to（）A、prevent the government from misusing its powerB、prevent the government from being strongC、pacify those who opposed the ConstitutionD、meet the demands of small states.
Which two settings must be configured in order to use the GUI to configure Call Admission Controlwith voice applications？ （）A、 QoS must be set to PlatinumB、 WMM must be enabledC、 QoS must be set to GoldD、 TSPEC must be disabledE、 Cisco Compatible Extensions must be disabled
多选题Which two settings must be configured in order to use the GUI to configure Call Admission Control with voice applications?（）AQoS must be set to PlatinumBWMM must be enabledCQoS must be set to GoldDTSPEC must be disabledECisco Compatible Extensions must be disabled
单选题In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by （）.AconvectionBconductionCradiationDventilation
单选题In order to prevent a person（）general average contribution on the ground that he was at fault，the fault must be something which constitutes an actionable wrong.Ato recoverBto be recoveredCbeing recoveredDrecovering
单选题The starting air system usually has （） to prevent starting if anything is not in order.Adrain cocksBvent valvesCcounteractsDinterlocks
单选题Prior to getting underway，the Master or person in charge of a vessel must（）.Aconduct a fire drillBconduct a boat drillClog the fore and aft draft marksDtest the emergency generator
单选题Care must be taken to condition the （）in the boiler to prevent scaling, and corrosion, which can weaken the pressure vessel.AwaterBfuelCsteamDair
单选题In order for the automatic lifeboat drain to operate properly（）.Athe cap should be removed to drain the boat when it is waterborneBthe cage must be free of rubbish or the ball may not seat properlyCthere is an automatic ball check located in a siphon tubeDthe small lever to release the rubber ball float must be turned counterclockwise
单选题Most totally enclosed lifeboats are equipped with which of the following? （）ATanks for the storage of drinking waterBBallast tanks to prevent the boat from capsizingCA hydraulic start diesel engineDAuxiliary mechanical propulsion (Fleming gear)
单选题Which of the following statements about pump operations is NOT a correct statement?（）AIn order for a fluid to be pumped, a fluid must be made to flowBA substance must be cold in order for it to be pumpedCThe kinetic energy imparted by the pump can be used to force a liquid through a hydraulic systemDA pump must receive its energy from an external source
单选题The main engine is cooled with fresh water （）is added suitable small quantities of chemicals to prevent corrosion.Ain whichBon whichCto whichDby which
单选题Preventer bars are fitted on lifeboat releasing hooks to prevent（）.Athe falls from unhooking if the releasing gear is operated accidentally while the boat is being loweredBoperation of the release lever until the boat is waterborneCthe falls from rehooking after they have been releasedDaccidental unhooking when the falls become slack
单选题According to the regulations for life boat falls，which action must be taken at 30-month intervals?（）AEnd-for-endedBRenewedCInspectedDWeight tested
单选题The lubrication to the cylinders affected by the fire must be （）to prevent seizure and all scavenge drains must be （）to prevent the discharge of sparks and burning oil from the drains into the engine room.Adecreased；openedBdecreased；shutCincreased；openedDincreased；shut
单选题The shaft and spare parts（） should be well greased in order to avoid corrosion.Ain the store roomBin the cylinderCin the scavenge air boxDin the water box
单选题Electrical wiring on all “T-Boats” must be（）。Aconcealed to prevent mechanical damageBconcealed so the boat can be maintained more easilyCprotected from the weatherDin an accessible place behind the ceiling
单选题Aluminum lifeboats are subject to damage by electrolytic corrosion (the aluminum being eaten away). In working around boats of aluminum you must be very careful（）.Ato keep the boats covered at all timesBnot to leave steel or iron tools lying in or near these boatsCto keep an electric charge on the hull at all timesDto rinse these boats regularly with salt water
单选题A vessel is constructed with a steel hull and an aluminum superstructure. Which statement is TRUE?（）AThe aluminum will provide greater resistance to the spread of fire by conductionBThe aluminum structure is usually attached to a steel coaming by a method that insulates the two metalsCIf the superstructure is stressed，an aluminum structure requires additional expansion joints to prevent fractureDThe steel at the area of the aluminum-to-steel connection must be closely checked for galvanic corrosion