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
With No~1 and No~2 alternators running in parallel and the KW loads equally shared, one alternator is drawing much higher current than the other.What does this indicate?()
A

The alternators are not generating the same voltages and should be adjusted on automatic voltage regulator rheostats

B

Alternator frequencies are different and should be adjusted on the governor speed controllers

C

Alternators are out of phase and should be tripped and paralleled again

D

One alternator has lost one of its phases


参考答案

参考解析
解析: 暂无解析
更多 “单选题With No~1 and No~2 alternators running in parallel and the KW loads equally shared, one alternator is drawing much higher current than the other.What does this indicate?()A The alternators are not generating the same voltages and should be adjusted on automatic voltage regulator rheostatsB Alternator frequencies are different and should be adjusted on the governor speed controllersC Alternators are out of phase and should be tripped and paralleled againD One alternator has lost one of its phases” 相关考题
考题 已知下列反应的平衡常数2Cu(S)+1/2O2(g)=Cu2O(s) K1 Cu2O(s)+1/2O2(g)=2CuO(s) K2 则可指出反应2Cu(S)+O2(g)= 2CuO(s)的K等于:() A、K1+K2B、K1-K2C、K1×K2D、K1/K2

考题 关于K1、K2、K3的叙述正确的是()A.K1+K2=K3B.K1-K2=K3C.K1÷K2=K3D.K1×K2=K3

考题 The road runs________the railway.A、parallel inB、parallel toC、parallel withD、parallel on

考题 Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as _______.A.actuationB.sensitivityC.compensationD.promptness

考题 堆是一个键值序列{k1,k2,……kn),对i=1,2…,|n/2|,满足(48)。A.ki<k2i+1<k2iB.ki≤k2i≤k2i+1C.ki≤k2i 且ki≤k2i+1(2i+1≤n)D.ki≤k2i或ki≤k2i+1(2i+1≤n)

考题 用DIMENSIONK(2,3)命令定义数组K,再对各数组元素赋值:K(1,1)=1,K(1,2)=2,K(1,3)=3, K(2,1)=4,K(2,2)=5,K(2,3)=6,然后执行命令?K(2),则显示结果是______。A..T.B.4C.2D..F.

考题 You are running parallel to the coast and estimate that the current is against you.In plotting a running fix using bearings from the same object on the coast,the greatest safety margin from inshore dangers will result if what speed is used to determine _______.A.Minimum speed estimateB.Maximum speed estimateC.Average speed estimateD.A running fix should not be used under these conditions

考题 You are running parallel to the coast and take a running fix using bearings of the same object.If you are making less speed than used for the running fix,in relation to the position indicated by the fix,you will be ______.A.Closer to the coastB.Farther from the coastC.On the track line ahead of the fixD.On the track line behind the fix

考题 能正确表达图4所示的电路开关逻辑的是()。 A.K1 or K2 or K3 B.K1 or K2 and K3 C.(K1 and K2)or K3 D.K1 and(K2 or K3)

考题 两电缆直径分别为D1和D2,且D1D2,节距比m相同,其绞入率各为K1和K2,则两电缆的绞入率()。A、K1K2B、K2K1C、K1=K2D、K1≠K2

考题 电流互感器串级连接时,两只互感器的变比分别为K1和K2,则串级后的变比K=()。A、K1K2B、K1/K2C、K1+K2D、K1-K2

考题 负反馈调节系统,当正向环节K1和反馈环节K2乘积为(),则可以Y=X/K2。A、K1*K2》1B、K1*K2《1C、K1*K2=1D、K1*K2=0

考题 在对峙反应A+B«C+D中加入催化剂(k1、k2分别为正、逆向反应速率常数),则()A、k1、k2都增大,k1/k2增大;B、k1增大,k2减小,k1/k2增大;C、k1、k2都增大,k1/k2不变;D、k1和k2都增大,k1/k2减小。

考题 可逆反应2NO2→N2O4+Q,50℃时平衡常数K1, 0℃时平衡常数K2,100℃时平衡常数K3,则K1,K2,K3之间的数量关系是()。A、 K1<K2 <K3B、 K1=K2=K3C、 K3>K2>K1D、 K2>K1>K3

考题 已知AgI的Ksp=K1,〔Ag(CN)2〕-的K稳=K2,则下列反应的平衡常数为()A.gI(S)+2CN-------〔Ag(CN)2〕-+I-A、K1·K2B、K1/K2C、K2/K1D、K1+K2

考题 卷积f1(k+5)*f2(k-3)等于()。A、f1(k)*f2(k)B、f1(k)*f2(k-8)C、f1(k)*f2(k+8)D、f1(k+3)*f2(k-3)

考题 An administrator is planning a cluster running applications in 3 separate resource groups. RGA - Database 1 RGB - Web Server RGC - Database 2 Database 1 and Database 2 must be online before the Web Server. All resource groups have a Startup Policyof Online on Home Node Only. Which of the following will ensure that the resource groups are processed in the correct order?()A、Set the Serial Acquisition OrderB、Set the Parallel Acquisition OrderC、Configure Online on the Same Node DependencyD、Configure Online on Different Nodes Dependency

考题 对反应式(1)A+B=2C和(2)(1/2)A+(1/2)B=C,在相同条件下存在关系()A、ΔrGΘm(1)=2ΔrGΘm(2);KΘ(1)=KΘ(2)B、ΔrGΘm(1)=22ΔrGΘm(2);{KΘ(1)=KΘ(2)}2C、ΔrGΘm(1)=2ΔrGΘm(2);{KΘ(1)=KΘ(2)}2D、ΔrGΘm(1=)2ΔrGΘm(2);KΘ(1)=KΘ(2)

考题 两个并联的比例环节的放大系数为K1和K2,则等效框图的放大系数K=()。A、K1K2B、K1+K2C、K1/(1+K1K2)D、K1-K2

考题 单选题The load between two steam-driven alternators operating in parallel may be adjusted by varying ()A the speed of the alternatorsB the field strength of the machinesC the power factor of the alternatorsD steam supply to the prime movers

考题 单选题To parallel an incoming machine to a running machine therefore it is necessary to ensure firstly that ().A two frequencies must be brought into phaseB the incoming machine accepts a small amount of loadC the running machine must be unloadD both voltages are equal

考题 单选题Diesel engines driving alternators operating in parallel must maintain set frequency regardless of load changesThe governor characteristic used to accomplish this is known as ()A actuationB sensitivityC compensationD thrust shaft

考题 单选题设β1,β2是线性方程组Ax=b的两个不同的解,α1、α2是导出组Ax=0的基础解系,k1、k2是任意常数,则Ax=b的通解是(  )。A (β1-β2)/2+k1α1+k2(α1-α2)B α1+k1(β1-β2)+k2(α1-α2)C (β1+β2)/2+k1α1+k2(α1-α2)D (β1+β2)/2+k1α1+k2(β1-β2)

考题 单选题You are running parallel to the coast and take a running fix using bearings of the same object.If you are making less speed than used for the running fix,in relation to the position indicated by the fix,you will be().A Closer to the coastB Farther from the coastC On the track line ahead of the fixD On the track line behind the fix

考题 单选题You are running parallel to the coast and estimate that the current is against you.In plotting a running fix using bearings from the same object on the coast,the greatest safety margin from inshore dangers will result if what speed is used to determine().A Minimum speed estimateB Maximum speed estimateC Average speed estimateD A running fix should not be used under these conditions

考题 单选题已知n元非齐次线性方程组Ax=B,秩r(A)=n-2,α1,α2,α3为其线性无关的解向量,k1,k2为任意常数,则Ax=B的通解为(  )。[2014年真题]A x=k1(α1-α2)+k2(α1+α3)+α1B x=k1(α1-α3)+k2(α2+α3)+α1C x=k1(α2-α1)+k2(α2-α3)+α1D x=k1(α2-α3)+k2(α1+α2)+α1

考题 单选题A spring line is a().A mooring line made of spring lay wire ropeB mooring line running diagonally to the keelC mooring line parallel to the keelD wire rope used for securing an anchor buoy