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单选题
（）are supplied by main switchboard directly.
A
Suez Canal searchlight, air compressor and air conditioning compressor
B
Air compressor, boiler blower and refrigeration plant
C
Boiler blower, Suez Canal searchlight and refrigeration plant
D
Suez canal searchlight, air compressor and boiler blower
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更多 “单选题（）are supplied by main switchboard directly.A Suez Canal searchlight, air compressor and air conditioning compressorB Air compressor, boiler blower and refrigeration plantC Boiler blower, Suez Canal searchlight and refrigeration plantD Suez canal searchlight, air compressor and boiler blower” 相关考题
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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
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The upper piston rings m large, slow-speed, two-stroke/cycle diesel engines are most effectively lubricated by oil ____.A.fed from mechanical lubricatorsB.thrown off from the main bearingsC.supplied from wick fed drip lubricatorsD.flow from a centrifugal or banjo oiler
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Lubrication for the main reduction gears used with diesel engines is usually supplied byA.oil from the main engine sumpB.an independent lube oil systemC.the stern bearing head tankD.the stem bearing sump tank
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For _______the power is supplied by main switchboard directly not through sub-boardA.saving network costB.improving the reliability of supplying power to important loadC.preventing sequence reversingD.increasing the power Factor of important load
考题
When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined（）。A、It is supplied by the CSU/DSU.B、It is supplied by the far end router.C、It is determined by the clock rate command.D、It is supplied by the Layer 1 bit stream timing.
考题
单选题（）is not installed on the emergency switchboard.A
Ammeter and changeover switchB
Speed governor deviceC
SynchroscopeD
Wattmeter
考题
单选题（）is not installed on the emergency switchboard.A
AmmeterB
VoltmeterC
WattmeterD
Synchroscope
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An indicator on the main switchboard should show （） the emergency battery is in service or not.A
thatB
whenC
ifD
whether
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A switchboard, for a AC electrical distribution system, will be provided with which of the following components （）.A
Frequency meterB
AmmeterC
VoltmeterD
All of the above
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Which of the following is true of the heating system of the Johnstown campus?A
The heat is supplied by human bodies only.B
The heat is supplied by both human bodies and other heat-emitting objects.C
The heat is supplied by both human bodies and conventional fuel.D
The heat is supplied by human bodies, other heat-emitting objects, and conventional fuel.
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（）is not installed on the emergency switchboard.A
Control panelB
Paralleling panelC
Load panelD
Busbar
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When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined?（）A
It is supplied by the CSU/DSU.B
It is supplied by the far end router.C
It is determined by the clock rate command.D
It is supplied by the Layer 1 bit stream timing.
考题
单选题When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）A
lag behind the increased fuel supplied to the engineB
enter the engine along with the increase in the fuelC
enter the engine before the increased fuel supplyD
leave the turbocharger as a negative pulse
考题
单选题A switchboard for an AC electrical system requires the use of which of the following devices（）.A
Frequency meterB
OhmmeterC
Induction voltage regulatorD
Current transformer governor
考题
单选题The crank chamber oil （）.A
can be recoveredB
is only supplied to cylindersC
only feeds the main bearingD
is a kind of detergent
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