题目内容

()是一种理想的摩擦状态。

A. 干摩擦
B. 边界摩擦
C. 混合摩擦
D. 流体摩擦

查看答案
更多问题

WhentwoACgeneratorsarebeingparalleled,thebreakershouldbeclosedwiththesynchroscopepointermatinginthe()

A. "slow"direction,justbeforethe12o'clockposition
B. "fast"direction,justafterthe12o'clockposition
C. "fast"direction,justbeforethe12o'clockposition
D. "slow"direction,justafterthe12o'clockposition

直流电机中,电刷位于()上。

A. 定子
B. 转子
C. 电枢
D. 外壳

Toprotecttherotorofamotordisassembledformaintenanceoroverhaul,itshouldbe()

A. suspendedbywireslingsinonecomeroftheshop
B. wrappedinseverallayersofheavypaperorcarboard
C. supportedbyflatwoodblocksontheworkbench
D. returnedtotheframeassoonasthebearingsareremoved

Electricalpowerisexpressedin()

A. ohms
B. volts
C. amps
D. watts

答案查题题库