单选题For use as protection from gas leaking from a refrigeration unit，each ship must be equipped with a（）.Aportable ventilation systemBflame safety lampCself-contained breathing apparatusDgas mask
单选题
For use as protection from gas leaking from a refrigeration unit，each ship must be equipped with a（）.
A
portable ventilation system
B
flame safety lamp
C
self-contained breathing apparatus
D
gas mask
参考解析
解析：
暂无解析
相关考题：
Moisture is removed from a refrigeration system byA.bleeding refrigerant from the condenserB.opening a drain petcock on the oil separatorC.condensing the water in the heat exchangerD.using a dehydrator cartridge
Which method is used to supply inert gas from a flue gas system to the cargo tanks?A.Exhaust gas pressure from the stackB.High capacity fanC.Inert gas compressorD.Natural aspiration
A customer requests a solution that will enhance the availability of their servers and ensure that the time needed to recover from an Operating System fault is at a minimum. What solution do you recommend？ （）A、Use RAID protection and add more memoryB、Install Operating System in RAID 0 （Parity） Disk ConfigurationC、Install Operating System in RAID 5 Disk ConfigurationD、Use RAID protection and ensure systems are backed-up daily
Which configuration command prevents a client from establishing multiple PPPoE connections from a single workstation?（）A、sessionsB、sa-validateC、split-horizonD、duplicate-protection
You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution. What actions must you take to stop a user named Mia Hamm from removing information from her mailbox？（）A、You must use log transactions.B、You must use a legal hold.C、You must use Outlook Protection Rules.D、You must use the Set-Mailbox Mia Hamm -LitigationHoldEnabled $true.
You have a computer that runs Windows 7. Windows Backup is configured to store backups on an externaldrive. You create a new NTFS volume on the computer. You need to configure Windows Backup to includethe files on the new volume as part of regularly scheduled backups. What should you do?（）A、From Backup and Restore， select Change settings.B、From Backup and Restore， select Create a system image.C、From the System Protection tab， create a restore point.D、From the System Protection tab， enable system protection for the new volume.
You have a computer that runs Windows 7. You add a new hard disk drive to the computer and create anew NTFS partition. You need to ensure that you can use the Previous Versions feature on the new drive. What should you do?（）A、From Disk Management, convert the new disk to a dynamic disk.B、From System Properties, configure the System Protection settings.C、From System and Security, enable BitLocker Drive Encryption (BitLocker).D、From the properties of the new drive, create a share and modify the caching settings.
单选题Hot gas defrosting uses the hot gas from （） to defrost the evaporator.Astarting air bottlesBdiesel enginesCboilersDrefrigeration compressors
单选题The passage warns of which of the following dangers?ACompanies in the United States may receive no protection from imports unless they actively seek protection from import competition.BCompanies that seek legal protection from import competition may incur legal costs that far exceed any possible gain.CCompanies that are United States owned but operate internationally may not be eligible for protection from import competition under the laws of the countries in which their plants operate.DCompanies that are not United States owned may seek legal protection from import competition under United States import relief laws.
单选题Enclosing the bicycle in a plastic bubble would _____.Amake it easier to useBsave muscular energyCprovide protection from the weatherDprevent it from colliding with other vehicles
单选题The required fireman’s outfits required for ship’s are not to be used for any other purpose EXCEPT for the（）.Aoxygen and explosion meter when it is used for detection of flare gasesBself-contained breathing apparatus，when used as protection from gas leaking from a refrigeration unitCboots and gloves that are made of rubber or electrically non-conductive material，if used when repairing electrical equipmentDlifeline，if used by personnel entering a compartment which might be deficient of oxygen
单选题In a compression refrigeration plant the refrigerant flows from the expansion valve and through the （） where it absorbs heat from the space being cooled and becomes a gas or vapor.AcompressorBcondenserCthrottle valveDevaporator
单选题The function of （） in a refrigeration plant using Freon is to move moisture from all refrigeration system.AfilterBfilter drierCheat exchangerDair cooler
单选题Air or noncondensable gas is removed from a refrigeration system by a （）Aseparating chamberBsystem of bafflesCpurge valveDvacuum reducing valve
单选题Moisture is removed from a refrigeration system by（）.Ableeding refrigerant from the condenserBopening a drain petcock on the oil separatorCcondensing the water in the heat exchangerDusing a dehydrator cartridge
单选题Black smoke exhausting from an operating diesel engine can be caused by （）Afuel dribbling from leaking fuel injectorsBburning fuel with a high carbon contentCburning fuel with a high vanadium contentDburning fuel with a lower sulphur content
单选题On all vessels equipped with refrigeration units of over 20 cubic foot capacity, （）.Aa gas mask suitable for protection against each refrigerant used, or a self contained breathing apparatus must be providedBit is the sole responsibility of the chief engineer to ascertain that all members of the engineering department are familiar with the use of gas masks or breathing apparatusCspare charges shall be carried for at least 50% of each size and variety of gas masks and/or self contained breathing apparatusDall of the above
单选题The refrigeration compressor in a water cooled refrigeration system is short cycling on the high pressure cutout switch， One reason for this could be the （）.Asystem is low on refrigerantBhigh pressure cutout switch is improperly adjustedCdischarge valves are leaking slightlyDdischarge valves are leaking excessively
单选题A liquid sight flow indicator in a refrigeration system is examined and gas bubbles are noted in motion with the fluid flowThis means （）.Athe system is fully chargedBthere is air leaking in from the condenserCice crystals are forming in the refrigerantDthe system contains less than a full charge of refrigerant
单选题You create a Windows Communication Foundation (WCF) service and deploy it with wsHttpBinding and message security enabled.You create an intermediate WCF service for logging messages sent to the primary service.The intermediate service is called via endpoint behaviour. The primary service is receiving malformed data from a client application.You need to enable inspection of the malformed data and prevent message tampering. What do you do?（）ASpecify a protection level of None in the contract for the intermediate service. Disable message and transport security from the client application configuration file.BSpecify a protection level of Sign in the contract for the intermediate service. Disable transport security from the client application configuration file.CModify the binding on the intermediate service to use netNamedPipeBinding.DModify the binding on the intermediate service to use webHttpBinding.
单选题Which one of the following is not generally recognized as one constitute of bilge water?（）AOil leaking from tanks inside engine roomBEngine room cleaning waterCWater leaking from the separator sludge tankDSewage
单选题Which configuration command prevents a client from establishing multiple PPPoE connections from a single workstation?（）AsessionsBsa-validateCsplit-horizonDduplicate-protection
单选题Which method is used to supply inert gas from a flue gas system to the cargo tanks?（）AExhaust gas pressure from the stackBHigh capacity fanCInert gas compressorDNatural aspiration
单选题A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）Apurge lube oil from the liquid refrigerantBrecover water purged from the systemCseparate foul gases from the receiverDpurge non-condensable gases without losing refrigerant
单选题The purpose of the deck seal in an inert gas system is to prevent（）.Aflammable vapors from entering machinery spaceBflue gas escaping to atmosphereCinert gas escaping to atmosphereDair entering inert gas system
单选题Longitudinal and transverse separtions between the tanks,which are used to prevent liquids from leaking from one double bottom tank into the other ,are called（）.Adouble bottomsBcofferdamCnavigating bridgeDsuperstructure
单选题A ship must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement，you may use（）.Aa gas mask certified by the Mine Safety and Health AdministrationBthe same self-contained breathing apparatus required with the fireman's outfitCan oxygen breathing apparatus，provided that the device has been inspected within three yearsDa portable ventilation system that will provide a complete change of air every three minutes