单项选择题
On commonly used ships,if two A√Cgenerators are operated in parallel, the load is distributed evenly by （）.
A.varying the D-Cexciter voltage B.varying the reluctance of the air gap C.regulating the speed of prime mover D.shorting out part of the armature windings
单项选择题 Moisture in a D-Cmotor would cause （）.
单项选择题 Prior to any overhaul work on electric equipment, it is important to ensure the circuits are （）.
单项选择题 （） control system is one in which the control action is independent of the output.
