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
Line losses in a distribution circuit are kept to a minimum by （）.
A
adding rubber insulation conductors to the circuit
B
using higher current and lower voltage increasing the
C
number of thermal relays in the circuit
D
using higher voltage and lower current
参考答案
参考解析
解析：
暂无解析
更多 “单选题Line losses in a distribution circuit are kept to a minimum by （）.A adding rubber insulation conductors to the circuitB using higher current and lower voltage increasing theC number of thermal relays in the circuitD using higher voltage and lower current” 相关考题
考题
Copper losses are _____ losses in the primary and secondary windings of the transformer core.
A、inductiveB、capacitiveC、resistiveD、reactive
考题
When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is _____.A.laggingB.leadingC.maximumD.minimum
考题
The main difterence between a motor control circuit containing low voltage protection and low voltage release is that the latter contain
A.a magnetic operating coilB.normally open line contactsC.thermal-overload protectionD.a momentary-contact start button
考题
Please draw schematic of a common SRAM cell with 6 transistors,point out which nodes can store data and which node is word line control? （威盛笔试题circuit design-beijing-03.11.09）
考题
Please draw schematic of a common SRAM cell with 6 transistors,point outwhich nodes can store data and which node is word line control? （威盛笔试题circuit design-beijing-03.11.09）
考题
An alternator is being paralleled with one on the line At the instant the circuit breaker is close, the frequency of the incoming alternator will normallyA.increaseB.not changeC.decreaseD.be exactly 60 hertz
考题
Which two mechanisms control route distribution between PE routers in a 2547bis VPN?()
A. site idB. policiesC. circuit idD. extended communities
考题
For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of ______.A.three barrelsB.four barrelsC.six barrelsD.eight barrels
考题
On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the ______．A.minimum oxygen content lineB.critical displacement lineC.critical dilution lineD.upper threshold limit
考题
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor ______．A.when the line pull reaches the rated winch capacityB.after the line pull exceeds the rated winch capacityC.after a short build-up of torqueD.immediately
考题
Which of the following statements about teachers' instructions is NOT true?
A．Instructions should be simple and clear.
B．Instructions can be long and complicated for students to follow.
C．Teachers can use body language to assist students to understand.
D．Instructions should be kept to a minimum during activities.
考题
What happens when you enable QoS bandwidth detection? （）(Choose two.)A、Circuit speed is reduced by 2% for overhead.B、WAN speed can be configured to the LAN speed.C、Bandwidth is adjusted based on minimum and maximum settingsD、WAN bandwidth is detected based on acknowledgement of metapackets.
考题
Which two mechanisms control route distribution between PE routers in a 2547bis VPN?（）A、site idB、policiesC、circuit idD、extended communities
考题
（）is the most frequent activities in the logistics, but generally adds no value to a product, those operation should be kept to a minimum.A、TransportationB、Handling and carryingC、Marketing forecasts
考题
What is the minimum connection required for Call Home on an IBM System Storage DS8000?（）A、ISDN connectionB、Analog telephone lineC、Ethernet internet connectionD、Both an analog telephone line and an ethernet connection
考题
What happens when you enable QoS bandwidth detection? （）(Choose two.)A、Circuit speed is reduced by 2% for overhead.B、WAN speed can be configured to the LAN speed.C、Bandwidth is adjusted based on minimum and maximum settings.D、WAN bandwidth is detected based on acknowledgement of metapackets.
考题
单选题The downflooding angle for a ship is the minimum angle at which（）.A
the load line becomes submergedB
a non-watertight opening is at still water levelC
offset becomes excessiveD
reserve buoyancy is a maximum
考题
单选题If the resistance of a circuit is cut in half and the applied voltage is kept constant, the current flow will be （）.A
doubledB
quadrupledC
unchangedD
cut in half
考题
单选题（）is the most frequent activities in the logistics, but generally adds no value to a product, those operation should be kept to a minimum.A
TransportationB
Handling and carryingC
Marketing forecasts
考题
单选题If the electric motor driving an air compressor fails to start, the cause may be a （）.A
leaking unloaderB
tripped circuit breakerC
control line leakD
defective pop valve
考题
单选题If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.A
when the line pull reaches the rated winch capacityB
after the line pull exceeds the rated winch capacityC
after a short build-up of torqueD
immediately
考题
单选题The main difference between a motor control circuit containing low voltage protection and low voltage release is that the latter contains （）.A
a magnetic operating coilB
normally open line contactsC
thermal-overload protectionD
a momentary-contact start button
考题
单选题Why is it desirable to operate paralleled AC generators at the same power factor?（）A
Circulating currents are kept to a minimumB
Field excitation losses are kept to a minimumC
Generator rotors will have a lesser tendency to huntD
Because a power factor increase will decrease kilowatt output
考题
单选题For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of（）.A
three barrelsB
four barrelsC
six barrelsD
eight barrels
考题
单选题The static suction head of is the （）A
distance of the suction liquid level above the line of the pumpB
distance the suction liquid level is below the center line of the pumpC
force necessary to overcome frictional losses in the pump and pipingD
amount in inches of mercury the total suction head is below atmospheric pressure
考题
单选题A diesel generator has just been paralleled with an AC turbo-generator, but the load can not be properly divided.This could be caused by（）A
an incorrect diesel generator governor speed droop adjustmentB
a faulty reverse power relay within the main circuit breaker assemblyC
unsynchronized isochronous load distribution adjustmentsD
a different speed setting on each unit
考题
单选题Which of the following statements about teachers' instructions is NOT true?A
Instructions should be simple and clear.B
Instructions can be long and complicated for students to follow.C
Teachers can use body language to assist students to understand.D
Instructions should be kept to a minimum during activities.
热门标签
最新试卷