网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
An indicator on the main switchboard should show （） the emergency battery is in service or not.
A
that
B
when
C
if
D
whether
参考答案
参考解析
解析：
暂无解析
更多 “单选题An indicator on the main switchboard should show （） the emergency battery is in service or not.A thatB whenC ifD whether” 相关考题
考题
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
考题
Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.A.Orsat apparatusB.flame safety lampC.Halide torchD.combustible gas indicator
考题
Which command should you use to verify what networks are being routed by a given OSPF process()
A.show ip ospfB.show ip routeC.show ip protocolD.show ip ospfdatabaseE.None of the other alternatives apply
考题
Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information?()
A. the amount of available ROMB. the amount of available flash and RAM memoryC. the version of the bootstrap software present on the routerD. show versionE. show processesF. show running-config
考题
After each reading of an oxygen indicator, the instrument should be purged with ______.A.CO2B.fresh airC.the tested compartment’s airD.Water
考题
The administrator wants to verify the current state of the OSPF database loading process. Which show command should the administrator use?（）A、show ip ospf [process - id] interfaceB、show ip ospf neighborC、show ip ospf [process - id]D、show ip ospf [process - id area - id] database
考题
Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information?（）A、the amount of available ROMB、the amount of available flash and RAM memoryC、the version of the bootstrap software present on the routerD、show versionE、show processesF、show running-config
考题
Which command should you use to verify what networks are being routed by a given OSPFprocess？（）A、show ip ospfB、show ip routeC、show ip protocolD、show ip ospf databaseE、None of the other alternatives apply
考题
单选题（）is not installed on the main switchboard.A
Ammeter and changeover switchB
Power factor meterC
SynchroscopeD
Reverse sequence relay
考题
单选题The frequency of an alternator is controlled from the main switchboard by adjusting the（）A
frequency meterB
voltage regulatorC
governor controlD
sychroscope switch
考题
单选题If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）A
The cylinder indicator cocks should be openedB
The sump lube oil scavenge pump should be secured immediatelyC
The explosion relief valves should be manually openedD
The crankcase should remain unopened until the engine has cooled
考题
单选题（）are located on the road panel of main switchboard.A
Megohm meter, insulation light and synchroscopeB
Synchroscope, synchro light and megohm meterC
Shore power switch, insulation light and synchroscopeD
Megohm meter, insulation light and shore power switch
考题
单选题Two barges are being pushed ahead by a tugboat.Which statement is TRUE concerning lights on the barges（）.A
Each vessel should show sidelightsB
Each vessel should show at least one white lightC
The barges should be lighted as separate unitsD
The barges should be lighted as one vessel
考题
单选题（） is a machine by which electrical energy is transformed into mechanical energy.A
An alternatorB
An electric motorC
A diesel engineD
A main switchboard
考题
单选题（）is not a part of the main switchboard.A
BusbarB
Load panel of main generatorC
Paralleling panelD
Shore connection box
考题
单选题（）is power supplied by main switchboard directly not through sub-board.A
Deck machineryB
Little power loadC
Some important loadD
stationary submersible pump
考题
单选题When turning the engine with turning gear, you should keep the indicator cocks （）.A
attached to the indicatorsB
openedC
closedD
broken
考题
单选题Emergency generator is installed on board mainly to （）A
connect to the busbar when the load increasingB
supply power specially to charging panelC
be put into operation during the ship arriving at or leaving portD
ensure the power supply to critical equipment after the main switchboard out of power
考题
单选题An alternator switchboard has a synchroscope and synchronizing lamps, if the synchroscope is broken, which of the steps listed is the most essential before an alternator can be paralleled with the bus （）A
The breaker should be closed when one synchronizing lamp is dark and the other is brightB
The breaker should be closed when both synchronizing lamps are brightC
The frequency meter should be used to determine that the incoming alternator frequency is slightly higher than the busD
A portable phase sequence indicator must be used to verify the information from the lamps
考题
单选题Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.A
Orsat apparatusB
flame safety lampC
Halide torchD
combustible gas indicator
考题
单选题The purpose of a main switchboard circuit breakers reverse-power trip is to （）.A
prevent main circuit overloadB
protect the circuit breaker blowout coilC
prevent alternator motorizationD
prevent low voltage tripout
考题
单选题A ground in an electrical circuit outside the engine room （）.A
cannot be detected tinder normal conditionsB
is of no consequence to engineering personnelC
is indicated at the branch circuit breaker panelD
is indicated by the ground detecting lamps on the main switchboard
考题
单选题To （） , the power is supplied by main switchboard directly not though sub-board.A
save network costB
improve the reliability of supplying power to important loadC
prevent sequence reverseD
increase the power factor of important load
考题
单选题（） is (are) not power supplied by main switchboard directly.A
Steering gear and windlassB
Navigation light and radio power panelC
Navigation device power boxD
Daily fresh water pump
考题
单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
The expansion tank should be topped offB
The thermostatic water regulating valves should be manually openedC
The fuel filters should be changedD
The engine should be turned over slowly with the indicator cocks open
考题
单选题After each reading of an oxygen indicator，the instrument should be purged with（）.A
CO2B
fresh airC
the tested compartment's airD
water
热门标签
最新试卷
