Category: Synchronous Motors

A. the increased load has to take more current
B. the rotor by shifting its phase backward causes motor to take more current
C. the back e.m.f. decreases causing an increase in motor current
D. the rotor strengthens the rotating field casuing more motor current

A. small induction motor
B. D.C. series motor
C. D.C. shunt motor
D. double winding A.C./D.C. motor

A. alternator type machines
B. induction type machines
C. salient pole type machines
D. smooth cylindrical type machines

A. d.c. shunt motor
B. d.c. series motor
C. d.c. compound motor
D. induction motor
E. synchronous motor

A. high excitation only
B. low excitation only
C. both high and low excitation
D. none of the above

A. High field current
B. Low short circuit ratio
C. High core losses
D. Low field current

A. pull-up torque
B. pull-in torque
C. pull-out torque
D. none of the above

A. stop
B. run as induction motor
C. function as static condenser
D. burn with dense smoke

A. become more
B. become less
C. remain constant
D. none of the above

A. zero or 0.8 leading
B. unity or 0.8 lagging
C. unity or 0.8 leading
D. unity or zero