Category: Industrial Drives

A. D.C. motor
B. Squirrel cage induction motor
C. Wound rotor induction motor
D. Synchronous motor

A. Unsuitable for heavy duty starting
B. Torque varies as armature current
C. Torque-armature current is a straight line
D. Torque is zero for zero armature current

A. Starting torque
B. Conditions of environment
C. Limitation on starting current
D. Speed control range and its nature
E. All of the above

A. Frame
B. Rearing
C. Stator winding
D. Rotor winding

A. Star-delta
B. Resistance starting
C. Auto-transformer
D. None of the above

A. horsepower rating increases but r.p.m. decreases
B. horsepower rating decreases but r.p.m. increases
C. horsepower rating and operating speed increases
D. horsepower rating and operating speed decreases

A. slop speed operation
B. high starting torque
C. low windage losses
D. all of the above

A. auto-transformer
B. star-delta
C. slip ring
D. any of the above

A. Starting voltage is reduced
B. Starting current is reduced
C. Both A. and B.
D. None of the above

A. Lower cost
B. Better efficiency
C. High power factor
D. All of the above