The main generators are connected to ______.A.distribution boardsB.section boardsC.emergency switch boardsD.main switch boards
The main generators are connected to ______.
A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards
相关考题：
Energy is obtained from rivers by______.A. building bridges across themB. driving generators into themC. building dams across themD. directing them into homes and factories
We find your terms()and now send you our order for 3 sets of generators. A、satisfiedB、satisfactionC、satisfactoryD、of satisfaction
Where could you monitor the correct instant for synchronizing without aid of synchroscope or synchronizing lamp? A.Distribution boardB.Section boardC.Emergency switchboardD.Main switchboard
The emergency generator or emergency battery is connected to _______on most large ships.A.distribution boardsB.section boardsC.emergency switch boardsD.main switch boards
While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are______.A.running at the same speedB.groundedC.of the same polarityD.in phase
A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the ______．A.Fire hose might be damaged by cargo operationsB.Vessel is in portC.Fire-main system is not chargedD.Fire pumps are used for purposes other than supplying water to the fire main
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单选题The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.Ato be keptBloggedCchangedDhas remained
单选题Voltage generated by most AC generators is fed from the machine to the bus by means of（）.Abrushes on a commutatorBbrushes on slip ringsCslip rings on a commutatorDdirect connections from the stator
单选题Your company has a main office and two branch offices that are connected by WAN links. The main office runs the DNS service on three domain controllers. The zone for your domain is configured as an Active Directory-integrated zone. Each branch office has a single member server that hosts a secondary zone for the domain. The DNS servers in the branch offices use the main office DNS server as the DNS Master server for the zone. You need to minimize DNS zone transfer traffic over the WAN links. What should you do？（）ADecrease the Retry Interval setting in the Start of Authority （SOA） record for the zoneBDecrease the Refresh Interval setting in the Start of Authority （SOA） record for the zoneCIncrease the Refresh Interval setting in the Start of Authority （SOA） record for the zoneDDisable the netmask ordering option in the properties of the DNS master server for the zone.
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单选题Which of the following statements represents the main difference between a relay and a contactor?（）AContactors control current and relays control voltageBA relay is series connected and a contactor is parallel connectedCContactors can handle heavier loads than relaysDContactors are made from silver and relays are made from copper
单选题Normally，potable water systems are connected directly to the（）.Afire-main systemBfeed-water systemCfreshwater sanitary systemDdomestic water tank
单选题The main generators are connected to（）.Adistribution boardsBsection boardsCemergency switch boardsDmain switch boards
单选题Multiple fire pumps may be used for other purposes provided that one pump is（）.Aon line to the fire mainBkept available for use on the fire main at all timesCcapable of being connected to the fire mainDrated at or above 125 psi
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单选题A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.Afire hose might be damaged by cargo operationsBvessel is in portCfire-main system is not chargedDfire pumps are used for purposes other than supplying water to the fire main
单选题You are the network administrator for Tailspin Toys. The company has a main office and two branch offices. The network in the main office contains 10 servers and 100 client computers. Each branch office contains 5 servers and 50 client computers. Each branch office is connected to the main office by a direct T1 line. The network design requires that company IP addresses must be assigned from a single classful private IP address range. The network is assigned a class C private IP address range to allocate IP addresses for servers and client computers. Tailspin Toys acquires a company named Wingtip Toys. The acquisition will increase the number of servers to 20 and the number of client computers to 200 in the main office. The acquisition is expected to increase the number of servers to 20 and the number of client computers to 200 in the branch offices. The acquisition will also add 10 more branch offices. After the acquisition， all branch offices will be the same size. Each branch office will be connected to the main office by a direct T1 line. The new company will follow the Tailspin Toys network design requirements. You need to plan the IP addressing for the new company. You need to comply with the network design requirement. What should you do？（）A Assign the main office and each branch office a new class A private IP address range. B Assign the main office and each branch office a new class B private IP address range.C Assign the main office and each branch office a subnet from a new class B private IP address range.D Assign the main office and each branch office a subnet from the current class C private IP address range.
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单选题Where tanks are arranged for either oil or ballast （） must be fitted in the pipe so that only the ballast main or the oil transfer main connected to the tank.Aa sea water chestBa change-over chestCa buffer tankDa three-way valve
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