a) Any speed can be attained b) Speeds above normal speed can be attained c) Speeds below normal speed can be attained d) None of these Ans:(b)
a) Varying armature resistance b) Varying supply voltage c) Either (a) or (b) d) Varying field current Ans:(c)
a) Shunt motors b) Compound motors c) Series motors d) All of these Ans:(d)
a) Load current for which speed is zero b) Field current for which speed is maximum c) Load current for which speed is maximum d) Diverter current for which speed is maximum Ans:(c)
a) Armature b) Speed c) Magnetic field d) Both (a) and (c) Ans:(d)
a) Increase slightly b) Reduce slightly c) Remains constant d) None of these Ans:(b)
a) Field control method b) Voltage control method c) Armature control method d) None of these Ans:(c)
a) Steady speed b) Speeds above rated speed c) Speeds below rated speed d) Speeds above and below rated speed Ans:(b)