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
Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）
A
slightly less than the line frequency
B
the same as the line frequency
C
slightly greater than the line frequency
D
All of the above
参考答案
参考解析
解析：
暂无解析
更多 “单选题Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）A slightly less than the line frequencyB the same as the line frequencyC slightly greater than the line frequencyD All of the above” 相关考题
考题
The author quotes the example of our ancestors to show that education emerged __________.[A] when people had enough time[B] prior to better ways of finding food[C] when people on longer went hung[D] as a result of pressure on government
考题
You are attempting to parallel two AC.generators, and the synchroscope pointer revolving in the fast direction.This indicates that the frequency of the incoming machine is
A.higher than the bus equencyB.lower than the bus equencyC.the same as the bus frequency but out of phase with itD.same as the bus frequency and the circuit breaker may be closed at
考题
Which two are correct steps in taking a binary backup of MyISAM tables?()
A.Always stop the server prior to the backupB.Stop the server or lock the tables prior to the backupC.Stop the server or lock the databases prior to the backupD.Make a copy of the .frm, .myd, and the .myi filesE.Make a copy of the binary log and tablespace files
考题
You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. This indicates that the frequency of the incoming machine isA.higher than the bus frequencyB.lower than the bus frequencyC.file same as file bus frequency but out of phase with itD.the same as the bus frequency, and the circuit breaker may be closed at nay pointer position
考题
A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.A.can be reset to energize the circuitB.should open the circuit when overloadedC.will burn out when an over current flow developsD.should short the circuit when overloaded
考题
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
考题
A circuit breaker and a fuse have a basic similarity in that they both______.A.can be reset to energize the circuitB.should open the circuit when overloadedC.will burn out when an over current flow developsD.should short the circuit when overloaded
考题
When are fore and aft draft readings required to be entered in the unofficial logbook of a ship?A.Once a dayB.Once a weekC.Prior to getting underwayD.Only when entering waters of different density
考题
When loading a tanker，you should ______．A.load only one tank at a timeB.keep the seamen on watch on standby in the mess roomC.keep a strain on the loading hosesD.close valves by closing them down，reopening one or two turns，and re-closing
考题
Pollution regulations require that each scupper in an enclosed deck area have a ______．A.Wooden plugB.Soft rubber plugC.Two-piece soft patchD.Mechanical means of closing
考题
In which two situations should you run the command sync group?（） (Choose two.)A、when you enable Unified FailoverB、when you create an ActiveN groupC、when you synchronize the sticky tableD、when you require synchronization of the 3G Cache objects
考题
Which two are correct steps in taking a binary backup of MyISAM tables?（）A、Always stop the server prior to the backupB、Stop the server or lock the tables prior to the backupC、Stop the server or lock the databases prior to the backupD、Make a copy of the .frm, .myd, and the .myi filesE、Make a copy of the binary log and tablespace files
考题
When comparing java.io.BufferedWriter to java.io.FileWriter， which capability exists as a method in only one of the two？（） A、 closing the streamB、 flushing the streamC、 writing to the streamD、 marking a location in the streamE、 writing a line separator to the stream
考题
康明斯发电车调整控制箱内的超速保护板中，发动机怠速时三个指示灯情况为（）A、STOPCRANK亮、PARALLELING亮、OVERSPEED亮B、STOPCRANK亮、PARALLELING灭、OVERSPEED灭C、STOPCRANK灭、PARALLELING灭、OVERSPEED亮D、STOPCRANK亮、PARALLELING亮、OVERSPEED灭
考题
Which two of these elements need to be configured prior to enabling SSH？（）A、hostnameB、loopback addressC、default gatewayD、domain nameE、SSH peer address
考题
At which of the following times should the administrator refer to the HCL?（）A、Prior to purchasing hardwareB、Before installationC、When installing driversD、After installation
考题
单选题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
考题
多选题Which two of these elements need to be configured prior to enabling SSH？ （）AhostnameBloopback addressCdefault gatewayDdomain nameESSH peer address
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
多选题Which two are correct steps in taking a binary backup of MyISAM tables?（）AAlways stop the server prior to the backupBStop the server or lock the tables prior to the backupCStop the server or lock the databases prior to the backupDMake a copy of the .frm, .myd, and the .myi filesEMake a copy of the binary log and tablespace files
考题
单选题When the heat load begins to increase, the needle valve of an expansion valve will（）A
move in an opening directionB
move in a closing directionC
either open or closeD
not move at all
考题
单选题When two AC generators are being paralleled, the breaker should be closed with the synchroscope pointer mating in the （）A
slow direction, just before the 12 o'clock positionB
fast direction, just after the 12 o'clock positionC
fast direction, just before the 12 o'clock positionD
slow direction, just after the 12 o'clock position
考题
单选题The operation of paralleling two alternators requires the voltages to be （）and also in phase.A
zeroB
eliminatedC
differentD
equal
考题
单选题A circuit breaker and a fuse have a basic similarity in that they both （）.A
can be reset to energize the circuitB
should open the circuit when overloadedC
will burn out when an over current flow developsD
All of the above
考题
单选题You are attempting to parallel two AC generators, and the syncope pointer is revolving in the fast directionThis indicates that the frequency of the incoming machine is （）.A
higher than the bus frequencyB
lower than the bus frequencyC
the same as the bus frequency but out of phase with itD
the same as the bus frequency and the circuit breaker may be closed at any pointer position
考题
单选题When comparing java.io.BufferedWriter to java.io.FileWriter， which capability exists as a method in only one of the two？（）A
closing the streamB
flushing the streamC
writing to the streamD
marking a location in the streamE
writing a line separator to the stream
考题
单选题When paralleling two AC generators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be （）A
slightly less than the oncoming generator frequencyB
the same as the bus frequencyC
slightly greater than the bus frequencyD
the same as the bus voltage
热门标签
最新试卷
