Short-circuit test on an induction motor cannot be used to determine___________?
A. windage losses
B. copper losses
C. transformation ratio
D. power scale of circle diagram
A. windage losses
B. copper losses
C. transformation ratio
D. power scale of circle diagram
A. slip ring induction motor
B. squirrel cage induction motor
C. both A. and (b)
D. none of the above
A. increases the load torque
B. decreases the starting torque
C. increases the starting torque
D. none of the above
A. stall after sometime
B. stall immediately
C. continue to run at lower speed without damage
D. get heated and subsequently get damaged
A. graphite
B. grease
C. mineral oil
D. molasses
A. motor takes five to seven times its full load current
B. it will pick-up very high speed and may go out of step
C. it will run in reverse direction
D. starting torque is very high
A. squirrel-cage induction motors only
B. slip ring induction motors only
C. both A. and (b)
D. none of the above